diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3df81d2f..eb1298a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,24 @@
 
+2.1.0 / 2016-06-22
+==================
+
+New functionality and features
+------------------------------
+
+  * New configuration parameter `:client_hints`
+  * Enhanced auto `width` values
+  * Enhanced `quality` values
+
+Other Changes
+-------------
+
+  * Use duck-typing to set/get attributes.
+  * Updated dependencies
+  * Add `client_hints`, `width`, `quality` tests
+  * Create spec-helper.coffee. Add `sharedExamples`.
+  * Fix assets compilation issue with Cloudinary GEM cloudinary/cloudinary_gem#203
+  * Remove map reference in `js` folder. Fixes cloudinary/cloudinary_gem#199
+
 2.0.9 / 2016-06-05
 ==================
 
diff --git a/Gruntfile.coffee b/Gruntfile.coffee
index 199e0ad6..5c4deb60 100644
--- a/Gruntfile.coffee
+++ b/Gruntfile.coffee
@@ -61,12 +61,22 @@ module.exports = (grunt)->
         reporters: ['dots']
         configFile: 'karma.coffee'
         browserDisconnectTolerance: 3
+        files: [
+          { pattern: 'test/docRoot/*', watched: false, included: false, served: true, nocache: false}
+          { pattern: 'test/docRoot/css/*', watched: false, included: false, served: true, nocache: false}
+          { pattern: 'bower_components/bootstrap/dist/css/*', watched: false, included: false, served: true, nocache: false}
+          { pattern: 'bower_components/bootstrap/dist/js/*', watched: false, included: false, served: true, nocache: false}
+          { pattern: 'bower_components/blueimp-file-upload/js/*', watched: false, included: false, served: true, nocache: false}
+          { pattern: 'bower_components/jquery.ui/ui/*', watched: false, included: false, served: true, nocache: false}
+        ]
+
       'cloudinary-core':
         files:
           src:
             [
               "bower_components/lodash/lodash.js"
               "<%= karmaCommon %>"
+              "test/spec/responsive-core-spec.js"
             ]
 
 
@@ -74,6 +84,7 @@ module.exports = (grunt)->
         files:
           src: [
               "<%= karmaCommon %>"
+              "test/spec/responsive-shrinkwrap-spec.js"
             ]
 
       'cloudinary-jquery':
@@ -81,6 +92,7 @@ module.exports = (grunt)->
           src: [
               "bower_components/jquery/dist/jquery.js"
               "<%= karmaCommon %>"
+              "test/spec/responsive-jquery-spec.js"
             ]
 
       'cloudinary-jquery-file-upload':
@@ -152,12 +164,12 @@ module.exports = (grunt)->
         files: for repo in repos
           dest = if /shrinkwrap/.test(repo) then "cloudinary-core" else repo
           {'cwd': 'build','src': ["#{repo}.js", "#{repo}.min.js", "#{repo}.min.js.map"], 'dest': "../pkg/pkg-#{dest}/", 'expand': true}
-      doc:
-        files: for repo in repos when !/shrinkwrap/.test(repo)
-          expand: true
-          cwd: "doc/pkg-#{repo}/"
-          src: ["**"]
-          dest: "../pkg/pkg-#{repo}/"
+#      doc:
+#        files: for repo in repos when !/shrinkwrap/.test(repo)
+#          expand: true
+#          cwd: "doc/pkg-#{repo}/"
+#          src: ["**"]
+#          dest: "../pkg/pkg-#{repo}/"
 
     version:
       options:
@@ -282,7 +294,7 @@ module.exports = (grunt)->
   grunt.loadNpmTasks('grunt-version')
 
   grunt.registerTask('default', ['concat', 'coffee'])
-  grunt.registerTask('compile', ['clean:build', 'clean:js', 'concat', 'coffee', 'copy:backward-compatible', 'copy:dist'])
+  grunt.registerTask('compile', ['clean:build', 'clean:js', 'concat', 'coffee', 'copy:backward-compatible'])
   grunt.registerTask('build', ['clean', 'concat', 'coffee', 'copy:backward-compatible', 'jsdoc'])
   grunt.registerTask('lodash', (name, target)->
     lodashCalls = grunt.file.read('src/util/lodash.coffee').match(/_\.\w+/g)
diff --git a/Gruntfile.js b/Gruntfile.js
index 141dd641..91c25c7c 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -60,21 +60,60 @@
         options: {
           reporters: ['dots'],
           configFile: 'karma.coffee',
-          browserDisconnectTolerance: 3
+          browserDisconnectTolerance: 3,
+          files: [
+            {
+              pattern: 'test/docRoot/*',
+              watched: false,
+              included: false,
+              served: true,
+              nocache: false
+            }, {
+              pattern: 'test/docRoot/css/*',
+              watched: false,
+              included: false,
+              served: true,
+              nocache: false
+            }, {
+              pattern: 'bower_components/bootstrap/dist/css/*',
+              watched: false,
+              included: false,
+              served: true,
+              nocache: false
+            }, {
+              pattern: 'bower_components/bootstrap/dist/js/*',
+              watched: false,
+              included: false,
+              served: true,
+              nocache: false
+            }, {
+              pattern: 'bower_components/blueimp-file-upload/js/*',
+              watched: false,
+              included: false,
+              served: true,
+              nocache: false
+            }, {
+              pattern: 'bower_components/jquery.ui/ui/*',
+              watched: false,
+              included: false,
+              served: true,
+              nocache: false
+            }
+          ]
         },
         'cloudinary-core': {
           files: {
-            src: ["bower_components/lodash/lodash.js", "<%= karmaCommon %>"]
+            src: ["bower_components/lodash/lodash.js", "<%= karmaCommon %>", "test/spec/responsive-core-spec.js"]
           }
         },
         'cloudinary-core-shrinkwrap': {
           files: {
-            src: ["<%= karmaCommon %>"]
+            src: ["<%= karmaCommon %>", "test/spec/responsive-shrinkwrap-spec.js"]
           }
         },
         'cloudinary-jquery': {
           files: {
-            src: ["bower_components/jquery/dist/jquery.js", "<%= karmaCommon %>"]
+            src: ["bower_components/jquery/dist/jquery.js", "<%= karmaCommon %>", "test/spec/responsive-jquery-spec.js"]
           }
         },
         'cloudinary-jquery-file-upload': {
@@ -151,24 +190,6 @@
             }
             return results;
           })()
-        },
-        doc: {
-          files: (function() {
-            var i, len, results;
-            results = [];
-            for (i = 0, len = repos.length; i < len; i++) {
-              repo = repos[i];
-              if (!/shrinkwrap/.test(repo)) {
-                results.push({
-                  expand: true,
-                  cwd: "doc/pkg-" + repo + "/",
-                  src: ["**"],
-                  dest: "../pkg/pkg-" + repo + "/"
-                });
-              }
-            }
-            return results;
-          })()
         }
       },
       version: {
@@ -240,7 +261,7 @@
     grunt.loadNpmTasks('grunt-karma');
     grunt.loadNpmTasks('grunt-version');
     grunt.registerTask('default', ['concat', 'coffee']);
-    grunt.registerTask('compile', ['clean:build', 'clean:js', 'concat', 'coffee', 'copy:backward-compatible', 'copy:dist']);
+    grunt.registerTask('compile', ['clean:build', 'clean:js', 'concat', 'coffee', 'copy:backward-compatible']);
     grunt.registerTask('build', ['clean', 'concat', 'coffee', 'copy:backward-compatible', 'jsdoc']);
     return grunt.registerTask('lodash', function(name, target) {
       var func, i, include, len, lodashCalls;
diff --git a/bower.json b/bower.json
index 826542be..fcb298e4 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "cloudinary",
-  "version": "2.0.9",
+  "version": "2.1.0",
   "title": "Cloudinary jQuery Plugin",
   "authors": [
     {
diff --git a/js/jquery.cloudinary.js b/js/jquery.cloudinary.js
index 4c1fec41..bab6f030 100644
--- a/js/jquery.cloudinary.js
+++ b/js/jquery.cloudinary.js
@@ -1,6 +1,6 @@
 
 /**
- * Cloudinary's JavaScript library - Version 2.0.9
+ * Cloudinary's JavaScript library - Version 2.1.0
  * Copyright Cloudinary
  * see https://github.com/cloudinary/cloudinary_js
  *
@@ -2391,6 +2391,12 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
       return element;
     };
 
+    HtmlTag.isResponsive = function(tag, responsiveClass) {
+      var dataSrc;
+      dataSrc = Util.getData(tag, 'src-cache') || Util.getData(tag, 'src');
+      return Util.hasClass(tag, responsiveClass) && /\bw_auto\b/.exec(dataSrc);
+    };
+
     return HtmlTag;
 
   })();
@@ -2839,9 +2845,9 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
 
   })(TextLayer);
   Cloudinary = (function() {
-    var AKAMAI_SHARED_CDN, CF_SHARED_CDN, DEFAULT_POSTER_OPTIONS, DEFAULT_VIDEO_SOURCE_TYPES, OLD_AKAMAI_SHARED_CDN, SHARED_CDN, VERSION, absolutize, applyBreakpoints, cdnSubdomainNumber, closestAbove, cloudinaryUrlPrefix, defaultBreakpoints, finalizeResourceType, parentWidth;
+    var AKAMAI_SHARED_CDN, CF_SHARED_CDN, DEFAULT_POSTER_OPTIONS, DEFAULT_VIDEO_SOURCE_TYPES, OLD_AKAMAI_SHARED_CDN, SHARED_CDN, VERSION, absolutize, applyBreakpoints, cdnSubdomainNumber, closestAbove, cloudinaryUrlPrefix, defaultBreakpoints, finalizeResourceType, findContainerWidth, maxWidth, updateDpr;
 
-    VERSION = "2.0.9";
+    VERSION = "2.1.0";
 
     CF_SHARED_CDN = "d3jpl91pxevbkh.cloudfront.net";
 
@@ -3360,11 +3366,11 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
      * @ignore
      */
 
-    Cloudinary.prototype.calc_breakpoint = function(element, width) {
+    Cloudinary.prototype.calc_breakpoint = function(element, width, steps) {
       var breakpoints, point;
       breakpoints = Util.getData(element, 'breakpoints') || Util.getData(element, 'stoppoints') || this.config('breakpoints') || this.config('stoppoints') || defaultBreakpoints;
       if (Util.isFunction(breakpoints)) {
-        return breakpoints(width);
+        return breakpoints(width, steps);
       } else {
         if (Util.isString(breakpoints)) {
           breakpoints = ((function() {
@@ -3419,8 +3425,11 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
       return dprString;
     };
 
-    defaultBreakpoints = function(width) {
-      return 100 * Math.ceil(width / 100);
+    defaultBreakpoints = function(width, steps) {
+      if (steps == null) {
+        steps = 100;
+      }
+      return steps * Math.ceil(width / steps);
     };
 
     closestAbove = function(list, value) {
@@ -3515,17 +3524,17 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
       return this;
     };
 
-    applyBreakpoints = function(tag, width, options) {
+    applyBreakpoints = function(tag, width, steps, options) {
       var ref, ref1, ref2, responsive_use_breakpoints;
       responsive_use_breakpoints = (ref = (ref1 = (ref2 = options['responsive_use_breakpoints']) != null ? ref2 : options['responsive_use_stoppoints']) != null ? ref1 : this.config('responsive_use_breakpoints')) != null ? ref : this.config('responsive_use_stoppoints');
       if ((!responsive_use_breakpoints) || (responsive_use_breakpoints === 'resize' && !options.resizing)) {
         return width;
       } else {
-        return this.calc_breakpoint(tag, width);
+        return this.calc_breakpoint(tag, width, steps);
       }
     };
 
-    parentWidth = function(element) {
+    findContainerWidth = function(element) {
       var containerWidth, style;
       containerWidth = 0;
       while (((element = element != null ? element.parentNode : void 0) instanceof Element) && !containerWidth) {
@@ -3537,6 +3546,20 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
       return containerWidth;
     };
 
+    updateDpr = function(dataSrc, roundDpr) {
+      return dataSrc.replace(/\bdpr_(1\.0|auto)\b/g, 'dpr_' + this.device_pixel_ratio(roundDpr));
+    };
+
+    maxWidth = function(requiredWidth, tag) {
+      var imageWidth;
+      imageWidth = Util.getData(tag, 'width') || 0;
+      if (requiredWidth > imageWidth) {
+        imageWidth = requiredWidth;
+        Util.setData(tag, 'width', requiredWidth);
+      }
+      return requiredWidth;
+    };
+
 
     /**
     * Update hidpi (dpr_auto) and responsive (w_auto) fields according to the current container size and the device pixel ratio.
@@ -3554,10 +3577,16 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
      */
 
     Cloudinary.prototype.cloudinary_update = function(elements, options) {
-      var client_hints, containerWidth, dataSrc, imageWidth, j, len, ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, requestedWidth, responsive, responsiveClass, roundDpr, setUrl, tag;
+      var client_hints, containerWidth, dataSrc, j, len, match, ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, requiredWidth, responsive, responsiveClass, roundDpr, setUrl, tag;
       if (options == null) {
         options = {};
       }
+      client_hints = (ref = (ref1 = options.client_hints) != null ? ref1 : this.config('client_hints')) != null ? ref : false;
+      client_hints = client_hints || (typeof document !== "undefined" && document !== null ? document.querySelector('meta[http-equiv="Accept-CH"]') : void 0);
+      if (client_hints) {
+        return;
+      }
+      responsive = (ref2 = (ref3 = options.responsive) != null ? ref3 : this.config('responsive')) != null ? ref2 : false;
       elements = (function() {
         switch (false) {
           case !Util.isArray(elements):
@@ -3570,32 +3599,33 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
             return [elements];
         }
       })();
-      responsiveClass = (ref = (ref1 = this.responsiveConfig['responsive_class']) != null ? ref1 : options['responsive_class']) != null ? ref : this.config('responsive_class');
-      roundDpr = (ref2 = options['round_dpr']) != null ? ref2 : this.config('round_dpr');
+      responsiveClass = (ref4 = (ref5 = this.responsiveConfig['responsive_class']) != null ? ref5 : options['responsive_class']) != null ? ref4 : this.config('responsive_class');
+      roundDpr = (ref6 = options['round_dpr']) != null ? ref6 : this.config('round_dpr');
       for (j = 0, len = elements.length; j < len; j++) {
         tag = elements[j];
-        if (!((ref3 = tag.tagName) != null ? ref3.match(/img/i) : void 0)) {
+        if (!((ref7 = tag.tagName) != null ? ref7.match(/img/i) : void 0)) {
           continue;
         }
         setUrl = true;
-        client_hints = (ref4 = (ref5 = options.client_hints) != null ? ref5 : this.config('client_hints')) != null ? ref4 : false;
-        responsive = (ref6 = (ref7 = options.responsive) != null ? ref7 : this.config('responsive')) != null ? ref6 : false;
         if (responsive && !client_hints) {
           Util.addClass(tag, responsiveClass);
         }
         dataSrc = Util.getData(tag, 'src-cache') || Util.getData(tag, 'src');
         if (!Util.isEmpty(dataSrc)) {
-          dataSrc = dataSrc.replace(/\bdpr_(1\.0|auto)\b/g, 'dpr_' + this.device_pixel_ratio(roundDpr));
-          if (Util.hasClass(tag, responsiveClass) && /\bw_auto\b/.exec(dataSrc)) {
-            containerWidth = parentWidth(tag);
+          dataSrc = updateDpr.call(this, dataSrc, roundDpr);
+          if (HtmlTag.isResponsive(tag, responsiveClass)) {
+            containerWidth = findContainerWidth(tag);
             if (containerWidth !== 0) {
-              requestedWidth = applyBreakpoints.call(this, tag, containerWidth, options);
-              imageWidth = Util.getData(tag, 'width') || 0;
-              if (requestedWidth > imageWidth) {
-                imageWidth = requestedWidth;
-                Util.setData(tag, 'width', requestedWidth);
+              switch (false) {
+                case !/w_auto:breakpoints/.test(dataSrc):
+                  requiredWidth = maxWidth(containerWidth, tag);
+                  dataSrc = dataSrc.replace(/w_auto:breakpoints([_0-9]*)(:[0-9]+)?/, "w_auto:breakpoints$1:" + requiredWidth);
+                  break;
+                case !(match = /w_auto(:(\d+))?/.exec(dataSrc)):
+                  requiredWidth = applyBreakpoints.call(this, tag, containerWidth, match[2], options);
+                  requiredWidth = maxWidth(requiredWidth, tag);
+                  dataSrc = dataSrc.replace(/w_auto[^,\/]*/g, "w_" + requiredWidth);
               }
-              dataSrc = dataSrc.replace(/\bw_auto\b/g, 'w_' + imageWidth);
               Util.removeAttribute(tag, 'width');
               if (!options.responsive_preserve_height) {
                 Util.removeAttribute(tag, 'height');
@@ -4033,7 +4063,7 @@ var extend = function(child, parent) { for (var key in parent) { if (hasProp.cal
     TextLayer: TextLayer,
     SubtitlesLayer: SubtitlesLayer,
     Cloudinary: Cloudinary,
-    VERSION: "2.0.9",
+    VERSION: "2.1.0",
     CloudinaryJQuery: CloudinaryJQuery
   };
   return cloudinary;
diff --git a/karma.cloudinary-core.coffee b/karma.cloudinary-core.coffee
index f0e2a173..05ddbebd 100644
--- a/karma.cloudinary-core.coffee
+++ b/karma.cloudinary-core.coffee
@@ -5,7 +5,7 @@ module.exports = (config) ->
   config.set
 
     # base path that will be used to resolve all patterns (eg. files, exclude)
-    basePath: ''
+#    basePath: '.'
 
 
     # frameworks to use
@@ -23,6 +23,9 @@ module.exports = (config) ->
       'test/spec/tagspec.js'
       'test/spec/videourlspec.js'
       'test/spec/chaining-spec.js'
+      'test/spec/responsive-core-spec.js'
+      { pattern: 'test/docRoot/responsive-core-test.html', watched: false, included: false, served: true, nocache: false}
+      { pattern: 'bower_components/bootstrap/dist/css/*', watched: false, included: false, served: true, nocache: false}
     ]
 
     # preprocess matching files before serving them to the browser
diff --git a/karma.cloudinary-jquery-file-upload.coffee b/karma.cloudinary-jquery-file-upload.coffee
index aa90e3cc..1a4a7211 100644
--- a/karma.cloudinary-jquery-file-upload.coffee
+++ b/karma.cloudinary-jquery-file-upload.coffee
@@ -22,6 +22,7 @@ module.exports = (config) ->
       'bower_components/blueimp-file-upload/js/jquery.iframe-transport.js'
       'bower_components/blueimp-file-upload/js/jquery.fileupload-image.js'
       'build/cloudinary-jquery-file-upload.js'
+      'test/spec/spec-helper.js'
       'test/spec/cloudinary-spec.js'
       'test/spec/cloudinary-jquery-spec.js'
       'test/spec/cloudinary-jquery-upload-spec.js'
@@ -29,6 +30,8 @@ module.exports = (config) ->
       'test/spec/tagspec.js'
       'test/spec/videourlspec.js'
       'test/spec/chaining-spec.js'
+      'test/spec/responsive-jquery-spec.js'
+      {pattern: 'test/docRoot/responsive-jquery-test.html', watched: false, included: false, served: true, nocache: false}
     ]
 
 
diff --git a/karma.cloudinary-jquery.coffee b/karma.cloudinary-jquery.coffee
index dad161f5..763e935e 100644
--- a/karma.cloudinary-jquery.coffee
+++ b/karma.cloudinary-jquery.coffee
@@ -17,12 +17,15 @@ module.exports = (config) ->
     files: [
       'bower_components/jquery/dist/jquery.js'
       'build/cloudinary-jquery.js'
+      'test/spec/spec-helper.js'
       'test/spec/cloudinary-spec.js'
       'test/spec/cloudinary-jquery-spec.js'
       'test/spec/transformation-spec.js'
       'test/spec/tagspec.js'
       'test/spec/videourlspec.js'
       'test/spec/chaining-spec.js'
+      'test/spec/responsive-jquery-spec.js'
+      {pattern: 'test/docRoot/responsive-jquery-test.html', watched: false, included: false, served: true, nocache: false}
     ]
 
 
diff --git a/karma.coffee b/karma.coffee
index 894dec12..24d11248 100644
--- a/karma.coffee
+++ b/karma.coffee
@@ -51,7 +51,7 @@ module.exports = (config) ->
 
 # start these browsers
 # available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
-    browsers: ['Chrome' , 'Firefox', 'Safari']
+    browsers: ['Chrome' , 'Firefox', 'Safari', 'PhantomJS']
 
 
 # Continuous Integration mode
diff --git a/package.json b/package.json
index 97d1f7a1..8df58a19 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cloudinary_js",
-  "version": "2.0.9",
+  "version": "2.1.0",
   "description": "Cloudinary streamlines your web application’s image manipulation needs. Cloudinary's cloud-based servers automate image uploading, resizing, cropping, optimizing, sprite generation and more. Cloudinary's jQuery plugin allows direct uploading from the browser to the cloud and dynamic cloud-based image transformations and effects.",
   "main": "js/jquery.cloudinary.js",
   "directories": {
diff --git a/src/cloudinary.coffee b/src/cloudinary.coffee
index b5036421..76418b9f 100644
--- a/src/cloudinary.coffee
+++ b/src/cloudinary.coffee
@@ -1,5 +1,5 @@
 class Cloudinary
-  VERSION = "2.0.9"
+  VERSION = "2.1.0"
   CF_SHARED_CDN = "d3jpl91pxevbkh.cloudfront.net"
   OLD_AKAMAI_SHARED_CDN = "cloudinary-a.akamaihd.net"
   AKAMAI_SHARED_CDN = "res.cloudinary.com"
@@ -392,10 +392,10 @@ class Cloudinary
    * @private
    * @ignore
   ###
-  calc_breakpoint: (element, width) ->
+  calc_breakpoint: (element, width, steps) ->
     breakpoints = Util.getData(element, 'breakpoints') or Util.getData(element, 'stoppoints') or @config('breakpoints') or @config('stoppoints') or defaultBreakpoints
     if Util.isFunction breakpoints
-      breakpoints(width)
+      breakpoints(width, steps)
     else
       if Util.isString breakpoints
         breakpoints = (parseInt(point) for point in breakpoints.split(',')).sort((a, b) -> a - b)
@@ -423,8 +423,8 @@ class Cloudinary
       dprString += '.0'
     dprString
 
-  defaultBreakpoints = (width) ->
-    100 * Math.ceil(width / 100)
+  defaultBreakpoints = (width, steps = 100) ->
+    steps * Math.ceil(width / steps)
 
   closestAbove = (list, value) ->
     i = list.length - 2
@@ -505,20 +505,30 @@ class Cloudinary
     @cloudinary_update( images, options)
     this
 
-  applyBreakpoints = (tag, width, options)->
+  applyBreakpoints = (tag, width, steps, options)->
     responsive_use_breakpoints = options['responsive_use_breakpoints'] ? options['responsive_use_stoppoints'] ? @config('responsive_use_breakpoints') ? @config('responsive_use_stoppoints')
     if (!responsive_use_breakpoints) || (responsive_use_breakpoints == 'resize' and !options.resizing)
       width
     else
-      @calc_breakpoint(tag, width)
+      @calc_breakpoint(tag, width, steps)
 
-  parentWidth = (element) ->
+  findContainerWidth = (element) ->
     containerWidth = 0
     while ((element = element?.parentNode) instanceof Element) and !containerWidth
       style = window.getComputedStyle(element);
       containerWidth = Util.width(element) unless /^inline/.test(style.display)
     containerWidth
 
+  updateDpr = (dataSrc, roundDpr) ->
+    dataSrc.replace(/\bdpr_(1\.0|auto)\b/g, 'dpr_' + @device_pixel_ratio(roundDpr))
+
+  maxWidth = (requiredWidth, tag) ->
+    imageWidth = Util.getData(tag, 'width') or 0
+    if requiredWidth > imageWidth
+      imageWidth = requiredWidth
+      Util.setData(tag, 'width', requiredWidth)
+    requiredWidth
+
   ###*
   * Update hidpi (dpr_auto) and responsive (w_auto) fields according to the current container size and the device pixel ratio.
   * Only images marked with the cld-responsive class have w_auto updated.
@@ -534,6 +544,12 @@ class Cloudinary
   *   Should only be used if the transformation supports different aspect ratios.
   ###
   cloudinary_update: (elements, options = {}) ->
+    client_hints = options.client_hints ? @config('client_hints') ? false
+    client_hints = client_hints || document?.querySelector('meta[http-equiv="Accept-CH"]')
+    return if client_hints
+
+    responsive = options.responsive ? @config('responsive') ? false
+
     elements = switch
       when Util.isArray(elements)
         elements
@@ -549,26 +565,24 @@ class Cloudinary
 
     for tag in elements when tag.tagName?.match(/img/i)
       setUrl = true
-      client_hints = options.client_hints ? @config('client_hints') ? false
-      responsive = options.responsive ? @config('responsive') ? false
+
       if responsive && !client_hints
         Util.addClass(tag, responsiveClass)
       dataSrc = Util.getData(tag, 'src-cache') or Util.getData(tag, 'src')
       unless Util.isEmpty(dataSrc)
         # Update dpr according to the device's devicePixelRatio
-        dataSrc = dataSrc.replace(/\bdpr_(1\.0|auto)\b/g, 'dpr_' + @device_pixel_ratio(roundDpr))
-        if Util.hasClass(tag, responsiveClass) and /\bw_auto\b/.exec(dataSrc)
-          containerWidth = parentWidth(tag)
+        dataSrc = updateDpr.call(this, dataSrc, roundDpr)
+        if HtmlTag.isResponsive(tag, responsiveClass)
+          containerWidth = findContainerWidth(tag)
           if containerWidth != 0
-            requestedWidth = applyBreakpoints.call(this, tag, containerWidth, options)
-
-            imageWidth = Util.getData(tag, 'width') or 0
-            if requestedWidth > imageWidth
-              imageWidth = requestedWidth
-              Util.setData(tag, 'width', requestedWidth)
-
-#            tag.style.setProperty("max-width", requestedWidth)
-            dataSrc = dataSrc.replace(/\bw_auto\b/g, 'w_' + imageWidth)
+            switch
+              when /w_auto:breakpoints/.test(dataSrc)
+                requiredWidth = maxWidth(containerWidth, tag)
+                dataSrc = dataSrc.replace( /w_auto:breakpoints([_0-9]*)(:[0-9]+)?/, "w_auto:breakpoints$1:#{requiredWidth}")
+              when match = /w_auto(:(\d+))?/.exec(dataSrc)
+                requiredWidth = applyBreakpoints.call(this, tag, containerWidth, match[2] , options)
+                requiredWidth = maxWidth(requiredWidth, tag)
+                dataSrc = dataSrc.replace( /w_auto[^,\/]*/g, "w_#{requiredWidth}")
 
             Util.removeAttribute(tag, 'width')
             Util.removeAttribute(tag, 'height') unless options.responsive_preserve_height
diff --git a/src/tags/htmltag.coffee b/src/tags/htmltag.coffee
index 9b48154d..e1543823 100644
--- a/src/tags/htmltag.coffee
+++ b/src/tags/htmltag.coffee
@@ -162,3 +162,7 @@ class HtmlTag
     element = document.createElement(@name)
     element[name] = value for name, value of @attributes()
     element
+
+  @isResponsive: (tag, responsiveClass)->
+    dataSrc = Util.getData(tag, 'src-cache') or Util.getData(tag, 'src')
+    Util.hasClass(tag, responsiveClass) and /\bw_auto\b/.exec(dataSrc)
\ No newline at end of file
diff --git a/test/docRoot/responsive-core-test.html b/test/docRoot/responsive-core-test.html
index 97fba3bf..aa44c357 100644
--- a/test/docRoot/responsive-core-test.html
+++ b/test/docRoot/responsive-core-test.html
@@ -7,6 +7,7 @@
     <link href="css/logo-nav.css" rel="stylesheet">
     <script type="text/javascript" src="../../bower_components/lodash/lodash.js"></script>
     <script src="../../build/cloudinary-core.js"></script>
+    <title>Responsive Test</title>
 </head>
 
 <body>
@@ -22,7 +23,7 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
                 <li role="presentation" class="active"><a href="#home" aria-controls="home" role="tab"
                                                           data-toggle="tab">Home</a></li>
                 <li role="presentation"><a href="#profile" aria-controls="profile" role="tab" data-toggle="tab">
-                    <img id="image1" data-src="http://res.cloudinary.com/demo/image/upload/w_auto/smiling_man.jpg"
+                    <img id="image1" data-src="http://res.cloudinary.com/demo/image/upload/c_scale,w_auto/smiling_man.jpg"
                          class="cld-responsive"></a></li>
                 <li role="presentation"><a href="#messages" aria-controls="messages" role="tab" data-toggle="tab">
                     <img id="image2" data-src="http://res.cloudinary.com/demo/image/upload/w_auto/sample.jpg"
@@ -35,10 +36,10 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
             <!-- Tab panes -->
             <div class="tab-content">
                 <div role="tabpanel" class="tab-pane active" id="home">
-                    <a href="#"><img id="tabImage2" data-src="http://res.cloudinary.com/demo/image/upload/w_auto,c_scale/sample.jpg"
+                    <a href="#"><img id="tabImage2" data-src="http://demo-res.cloudinary.com/image/upload/c_scale,w_auto:breakpoints/sample.jpg"
                                                                             class="cld-responsive">
                 </a>
-                    <img id="tabImage3" data-src="http://res.cloudinary.com/demo/image/upload/w_auto,c_scale,e_sepia/sample.jpg"
+                    <img id="tabImage3" data-src="http://res.cloudinary.com/demo/image/upload/c_scale,e_sepia,w_auto/sample.jpg"
                                                                             class="cld-responsive">
                 </div>
                 <div role="tabpanel" class="tab-pane" id="profile">...</div>
@@ -54,6 +55,8 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
         window.onload = function(){
             var cl = cloudinary.Cloudinary.new( {cloud_name: "demo"});
             cl.responsive();
+            var event = new Event('karma-ready');
+            window.dispatchEvent(event);
         };
     </script>
 </div>
diff --git a/test/docRoot/responsive-jquery-test.html b/test/docRoot/responsive-jquery-test.html
index 544f0928..4e7d5bbc 100644
--- a/test/docRoot/responsive-jquery-test.html
+++ b/test/docRoot/responsive-jquery-test.html
@@ -30,7 +30,7 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
                 <li role="presentation" class="active"><a href="#home" aria-controls="home" role="tab"
                                                           data-toggle="tab">Home</a></li>
                 <li role="presentation"><a href="#profile" aria-controls="profile" role="tab" data-toggle="tab">
-                    <img id="image1" data-src="http://res.cloudinary.com/demo/image/upload/w_auto/smiling_man.jpg"
+                    <img id="image1" data-src="http://res.cloudinary.com/demo/image/upload/c_scale,w_auto/smiling_man.jpg"
                          class="cld-responsive"></a></li>
                 <li role="presentation"><a href="#messages" aria-controls="messages" role="tab" data-toggle="tab">
                     <img id="image2" data-src="http://res.cloudinary.com/demo/image/upload/w_auto/sample.jpg"
@@ -43,11 +43,12 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
             <!-- Tab panes -->
             <div class="tab-content">
                 <div role="tabpanel" class="tab-pane active" id="home">
-                    <a href="#" ><img id="tabImage2" data-src="http://res.cloudinary.com/demo/image/upload/w_auto,c_scale/sample.jpg"
+                    <a href="#" ><img id="tabImage2" data-src="http://demo-res.cloudinary.com/image/upload/c_scale,w_auto:breakpoints/sample.jpg"
                                                                             class="cld-responsive">
-                </a></div>
-                <img id="tabImage3" data-src="http://res.cloudinary.com/demo/image/upload/w_auto,c_scale,e_sepia/sample.jpg"
+                </a>
+                    <img id="tabImage3" data-src="http://res.cloudinary.com/demo/image/upload/c_scale,e_sepia,w_auto/sample.jpg"
                      class="cld-responsive">
+                </div>
                 <div role="tabpanel" class="tab-pane" id="profile">...</div>
                 <div role="tabpanel" class="tab-pane" id="messages">...</div>
                 <div role="tabpanel" class="tab-pane" id="settings">...</div>
@@ -59,8 +60,11 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
 
     <script type="text/javascript">
         $(function () {
+            $.cloudinary.config( {cloud_name: "demo"});
             $.cloudinary.responsive();
-        })
+            var event = new Event('karma-ready');
+            window.dispatchEvent(event);
+        });
     </script>
 </div>
 </body>
diff --git a/test/docRoot/responsive-jquery-upload-test.html b/test/docRoot/responsive-jquery-upload-test.html
index aaee29ee..541ec984 100644
--- a/test/docRoot/responsive-jquery-upload-test.html
+++ b/test/docRoot/responsive-jquery-upload-test.html
@@ -1,18 +1,18 @@
 <html>
 <head>
-    <link rel="stylesheet" href="bower_components/bootstrap/dist/css/bootstrap.css">
-    <link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap-theme.min.css">
+    <link rel="stylesheet" href="../../bower_components/bootstrap/dist/css/bootstrap.css">
+    <!--<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap-theme.min.css">-->
 
     <!-- Custom CSS -->
     <link href="css/logo-nav.css" rel="stylesheet">
-    <script src="bower_components/jquery/dist/jquery.js"></script>
+    <script src="../../bower_components/jquery/dist/jquery.js"></script>
     <script type="text/javascript" src="../../bower_components/jquery.ui/ui/widget.js"></script>
 
     <script type="text/javascript" src="../../bower_components/blueimp-file-upload/js/jquery.fileupload.js"></script>
     <script type="text/javascript" src="../../bower_components/blueimp-file-upload/js/jquery.iframe-transport.js"></script>
     <script type="text/javascript" src="../../bower_components/blueimp-file-upload/js/jquery.fileupload-process.js"></script>
     <script type="text/javascript" src="../../bower_components/blueimp-file-upload/js/jquery.fileupload-image.js"></script>
-    <script src="bower_components/bootstrap/dist/js/bootstrap.js"></script>
+    <script src="../../bower_components/bootstrap/dist/js/bootstrap.js"></script>
     <!--<script src="js/main.js"></script>-->
     <script src="../../build/cloudinary-jquery-file-upload.js"></script>
 </head>
@@ -30,7 +30,7 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
                 <li role="presentation" class="active"><a href="#home" aria-controls="home" role="tab"
                                                           data-toggle="tab">Home</a></li>
                 <li role="presentation"><a href="#profile" aria-controls="profile" role="tab" data-toggle="tab">
-                    <img id="image1" data-src="http://res.cloudinary.com/demo/image/upload/w_auto/smiling_man.jpg"
+                    <img id="image1" data-src="http://res.cloudinary.com/demo/image/upload/c_scale,w_auto/smiling_man.jpg"
                          class="cld-responsive"></a></li>
                 <li role="presentation"><a href="#messages" aria-controls="messages" role="tab" data-toggle="tab">
                     <img id="image2" data-src="http://res.cloudinary.com/demo/image/upload/w_auto/sample.jpg"
@@ -42,7 +42,13 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
 
             <!-- Tab panes -->
             <div class="tab-content">
-                <div role="tabpanel" class="tab-pane active" id="home">...</div>
+                <div role="tabpanel" class="tab-pane active" id="home">
+                    <a href="#" ><img id="tabImage2" data-src="http://demo-res.cloudinary.com/image/upload/c_scale,w_auto:breakpoints/sample.jpg"
+                                                                            class="cld-responsive">
+                </a>
+                    <img id="tabImage3" data-src="http://res.cloudinary.com/demo/image/upload/c_scale,e_sepia,w_auto/sample.jpg"
+                     class="cld-responsive">
+                </div>
                 <div role="tabpanel" class="tab-pane" id="profile">...</div>
                 <div role="tabpanel" class="tab-pane" id="messages">...</div>
                 <div role="tabpanel" class="tab-pane" id="settings">...</div>
@@ -54,8 +60,11 @@ <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
 
     <script type="text/javascript">
         $(function () {
+            $.cloudinary.config( {cloud_name: "demo"});
             $.cloudinary.responsive();
-        })
+            var event = new Event('karma-ready');
+            window.dispatchEvent(event);
+        });
     </script>
 </div>
 </body>
diff --git a/test/docRoot/responsive-shrinkwrap-test.html b/test/docRoot/responsive-shrinkwrap-test.html
new file mode 100644
index 00000000..35d898be
--- /dev/null
+++ b/test/docRoot/responsive-shrinkwrap-test.html
@@ -0,0 +1,62 @@
+<html>
+<head>
+    <link rel="stylesheet" href="../../bower_components/bootstrap/dist/css/bootstrap.css">
+    <link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap-theme.min.css">
+
+    <!-- Custom CSS -->
+    <link href="css/logo-nav.css" rel="stylesheet">
+    <script src="../../build/cloudinary-core-shrinkwrap.js"></script>
+    <title>Responsive Test</title>
+</head>
+
+<body>
+
+<div class="container">
+    <h1>Bootstrap &amp; Cloudinary Responsive Images</h1>
+    <hr>
+    <div class="row">
+        <div>
+
+            <!-- Nav tabs -->
+            <ul class="nav nav-tabs" role="tablist">
+                <li role="presentation" class="active"><a href="#home" aria-controls="home" role="tab"
+                                                          data-toggle="tab">Home</a></li>
+                <li role="presentation"><a href="#profile" aria-controls="profile" role="tab" data-toggle="tab">
+                    <img id="image1" data-src="http://res.cloudinary.com/demo/image/upload/c_scale,w_auto/smiling_man.jpg"
+                         class="cld-responsive"></a></li>
+                <li role="presentation"><a href="#messages" aria-controls="messages" role="tab" data-toggle="tab">
+                    <img id="image2" data-src="http://res.cloudinary.com/demo/image/upload/w_auto/sample.jpg"
+                         class="cld-responsive">
+                </a></li>
+                <li role="presentation"><a href="#settings" aria-controls="settings" role="tab" data-toggle="tab">Settings</a>
+                </li>
+            </ul>
+
+            <!-- Tab panes -->
+            <div class="tab-content">
+                <div role="tabpanel" class="tab-pane active" id="home">
+                    <a href="#"><img id="tabImage2" data-src="http://demo-res.cloudinary.com/image/upload/c_scale,w_auto:breakpoints/sample.jpg"
+                                                                            class="cld-responsive">
+                </a>
+                    <img id="tabImage3" data-src="http://res.cloudinary.com/demo/image/upload/c_scale,e_sepia,w_auto/sample.jpg"
+                                                                            class="cld-responsive">
+                </div>
+                <div role="tabpanel" class="tab-pane" id="profile">...</div>
+                <div role="tabpanel" class="tab-pane" id="messages">...</div>
+                <div role="tabpanel" class="tab-pane" id="settings">...</div>
+            </div>
+
+        </div>
+    </div>
+
+
+    <script type="text/javascript">
+        window.onload = function(){
+            var cl = cloudinary.Cloudinary.new( {cloud_name: "demo"});
+            cl.responsive();
+            var event = new Event('karma-ready');
+            window.dispatchEvent(event);
+        };
+    </script>
+</div>
+</body>
diff --git a/test/docRoot/spec-runner-with-jquery.html b/test/docRoot/spec-runner-with-jquery.html
index 0cf28c93..8623b421 100644
--- a/test/docRoot/spec-runner-with-jquery.html
+++ b/test/docRoot/spec-runner-with-jquery.html
@@ -21,7 +21,7 @@
     <script type="text/javascript" src="../spec/videourlspec.js"></script>
     <script type="text/javascript" src="../spec/tagspec.js"></script>
     <script type="text/javascript" src="../spec/chaining-spec.js"></script>
-
+    <script type="text/javascript" src="../spec/responsive-jquery-spec.js"></script>
 
 </head>
 
diff --git a/test/spec/responsive-core-spec.coffee b/test/spec/responsive-core-spec.coffee
index 1f303134..b7ce270c 100644
--- a/test/spec/responsive-core-spec.coffee
+++ b/test/spec/responsive-core-spec.coffee
@@ -1,5 +1,8 @@
-describe 'cloudinary', ()->
-  defaultConfig = cloud_name: 'demo'
+sharedExamples 'client side responsive', ->
+  if navigator.userAgent.toLowerCase().indexOf('phantom') > -1
+    console.warn("Skipping responsive tests in PhantomJS")
+    return
+  defaultConfig = cloud_name: 'sdk-test'
   cl = null
   describe "responsive", ()->
     fixtureContainer = undefined
@@ -10,12 +13,13 @@ describe 'cloudinary', ()->
     beforeAll (done)->
       # Open a new window with test HTML. A dynamic title is required in order to open a *new* window each time even if
       # previous window was not closed.
-      testWindow = window.open( "responsive-core-test.html","Cloudinary test #{(new Date()).toLocaleString()}", "width=500, height=500")
-
-      testWindow.addEventListener 'load', ()=>
+      testURL = "responsive-core-test.html"
+      testURL = "/base/test/docRoot/#{testURL}" if typeof __karma__ != "undefined"
+      testWindow = window.open(testURL, "Cloudinary test #{(new Date()).toLocaleString()}", "width=500, height=500")
+      testWindow.addEventListener 'karma-ready', ()=>
           testDocument = testWindow.document
           image1 = testDocument.getElementById('image1')
-          expect(image1.getAttribute('src')).toBeDefined()
+          expect(image1).toBeDefined()
           done()
         , false
 
@@ -23,7 +27,7 @@ describe 'cloudinary', ()->
       testWindow.close()
 
     beforeEach ()->
-      cl = new cloudinary.Cloudinary(cloud_name: 'demo')
+      cl = new cloudinary.Cloudinary(defaultConfig)
       fixtureContainer = document.createElement('div')
       fixtureContainer.id="fixture";
       document.body.appendChild(fixtureContainer)
@@ -46,7 +50,7 @@ describe 'cloudinary', ()->
       aContainer = document.createElement('a')
       divContainer.appendChild( aContainer)
       img = cl.image('sample.jpg',
-        width: 'auto:breakpoints'
+        width: 'auto'
         dpr: 'auto'
         crop: 'scale'
         responsive: true
@@ -94,17 +98,17 @@ describe 'cloudinary', ()->
       expect(img.getAttribute('src')).toBeFalsy()
       expect(cloudinary.Util.hasClass(img, 'cld-responsive')).toBeTruthy()
       cl.responsive()
-      expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
+      expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
       container.style.width = "211px"
-      expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
+      expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
       triggerResize window
       window.setTimeout ()->
           # wait(200)
-          expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
+          expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
           container.style.width = "101px"
           window.setTimeout ()->
               # wait(200)
-              expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
+              expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
               done()
             , 200
         , 200
@@ -113,7 +117,8 @@ describe 'cloudinary', ()->
       image1 = testDocument.getElementById('image1')
       src = image1.getAttribute('src')
       expect(src).toBeDefined()
-      currentWidth = src.match(/w_(\d+)/)[1]
+      expect(src).not.toBe('')
+      currentWidth = src.match(/w_(auto:)?(breakpoints[_\d]*:)?(\d+)/)[3]
       handler = ()->
         src = image1.getAttribute('src')
         expect(src).toBeDefined()
@@ -127,4 +132,13 @@ describe 'cloudinary', ()->
       it "should set the class used for responsive functionality", ->
         img = cl.image( "sample", responsive: true, responsive_class: "cl-foobar")
         expect(cloudinary.Util.hasClass(img, "cl-foobar")).toBeTruthy()
-      
\ No newline at end of file
+
+describe 'Client side responsive', ->
+  describe 'client_hints', ->
+    describe 'false', ->
+      itBehavesLike 'client side responsive'
+    describe 'true', ->
+      beforeEach ->
+        cl.config().client_hints = true
+      itBehavesLike 'client side responsive'
+
diff --git a/test/spec/responsive-core-spec.js b/test/spec/responsive-core-spec.js
index 6ab97a92..ccb9700e 100644
--- a/test/spec/responsive-core-spec.js
+++ b/test/spec/responsive-core-spec.js
@@ -1,7 +1,11 @@
-describe('cloudinary', function() {
+sharedExamples('client side responsive', function() {
   var cl, defaultConfig;
+  if (navigator.userAgent.toLowerCase().indexOf('phantom') > -1) {
+    console.warn("Skipping responsive tests in PhantomJS");
+    return;
+  }
   defaultConfig = {
-    cloud_name: 'demo'
+    cloud_name: 'sdk-test'
   };
   cl = null;
   return describe("responsive", function() {
@@ -11,13 +15,18 @@ describe('cloudinary', function() {
     container = void 0;
     testWindow = null;
     beforeAll(function(done) {
-      testWindow = window.open("responsive-core-test.html", "Cloudinary test " + ((new Date()).toLocaleString()), "width=500, height=500");
-      return testWindow.addEventListener('load', (function(_this) {
+      var testURL;
+      testURL = "responsive-core-test.html";
+      if (typeof __karma__ !== "undefined") {
+        testURL = "/base/test/docRoot/" + testURL;
+      }
+      testWindow = window.open(testURL, "Cloudinary test " + ((new Date()).toLocaleString()), "width=500, height=500");
+      return testWindow.addEventListener('karma-ready', (function(_this) {
         return function() {
           var image1;
           testDocument = testWindow.document;
           image1 = testDocument.getElementById('image1');
-          expect(image1.getAttribute('src')).toBeDefined();
+          expect(image1).toBeDefined();
           return done();
         };
       })(this), false);
@@ -26,9 +35,7 @@ describe('cloudinary', function() {
       return testWindow.close();
     });
     beforeEach(function() {
-      cl = new cloudinary.Cloudinary({
-        cloud_name: 'demo'
-      });
+      cl = new cloudinary.Cloudinary(defaultConfig);
       fixtureContainer = document.createElement('div');
       fixtureContainer.id = "fixture";
       return document.body.appendChild(fixtureContainer);
@@ -53,7 +60,7 @@ describe('cloudinary', function() {
       aContainer = document.createElement('a');
       divContainer.appendChild(aContainer);
       img = cl.image('sample.jpg', {
-        width: 'auto:breakpoints',
+        width: 'auto',
         dpr: 'auto',
         crop: 'scale',
         responsive: true
@@ -99,15 +106,15 @@ describe('cloudinary', function() {
       expect(img.getAttribute('src')).toBeFalsy();
       expect(cloudinary.Util.hasClass(img, 'cld-responsive')).toBeTruthy();
       cl.responsive();
-      expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
+      expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
       container.style.width = "211px";
-      expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
+      expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
       triggerResize(window);
       return window.setTimeout(function() {
-        expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
+        expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
         container.style.width = "101px";
         return window.setTimeout(function() {
-          expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
+          expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
           return done();
         }, 200);
       }, 200);
@@ -117,7 +124,8 @@ describe('cloudinary', function() {
       image1 = testDocument.getElementById('image1');
       src = image1.getAttribute('src');
       expect(src).toBeDefined();
-      currentWidth = src.match(/w_(\d+)/)[1];
+      expect(src).not.toBe('');
+      currentWidth = src.match(/w_(auto:)?(breakpoints[_\d]*:)?(\d+)/)[3];
       handler = function() {
         var newWidth;
         src = image1.getAttribute('src');
@@ -142,4 +150,18 @@ describe('cloudinary', function() {
   });
 });
 
+describe('Client side responsive', function() {
+  return describe('client_hints', function() {
+    describe('false', function() {
+      return itBehavesLike('client side responsive');
+    });
+    return describe('true', function() {
+      beforeEach(function() {
+        return cl.config().client_hints = true;
+      });
+      return itBehavesLike('client side responsive');
+    });
+  });
+});
+
 //# sourceMappingURL=responsive-core-spec.js.map
diff --git a/test/spec/responsive-core-spec.js.map b/test/spec/responsive-core-spec.js.map
index e76ad0cb..eff9ae70 100644
--- a/test/spec/responsive-core-spec.js.map
+++ b/test/spec/responsive-core-spec.js.map
@@ -6,5 +6,5 @@
     "responsive-core-spec.coffee"
   ],
   "names": [],
-  "mappings": 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 }
\ No newline at end of file
diff --git a/test/spec/responsive-jquery-spec.coffee b/test/spec/responsive-jquery-spec.coffee
index a04c3b1a..c318c99b 100644
--- a/test/spec/responsive-jquery-spec.coffee
+++ b/test/spec/responsive-jquery-spec.coffee
@@ -1,5 +1,8 @@
-describe 'Cloudinary', ()->
-  defaultConfig = cloud_name: 'demo'
+sharedExamples 'client side responsive', ->
+  if navigator.userAgent.toLowerCase().indexOf('phantom') > -1
+    console.warn("Skipping responsive tests in PhantomJS")
+    return
+  defaultConfig = cloud_name: 'sdk-test'
   cl =null
   describe "responsive", ()->
     fixtureContainer = undefined
@@ -9,12 +12,14 @@ describe 'Cloudinary', ()->
     beforeAll (done)->
       # Open a new window with test HTML. A dynamic title is required in order to open a *new* window each time even if
       # previous window was not closed.
-      testWindow = window.open( "responsive-jquery-test.html","Cloudinary test #{(new Date()).toLocaleString()}", "width=500, height=500")
+      testURL = "responsive-jquery-test.html"
+      testURL = "/base/test/docRoot/#{testURL}" if typeof __karma__ != "undefined"
+      testWindow = window.open( testURL,"Cloudinary test #{(new Date()).toLocaleString()}", "width=500, height=500")
 
-      testWindow.addEventListener 'load', ()=>
+      testWindow.addEventListener 'karma-ready', ()=>
           testDocument = testWindow.document
           image1 = testDocument.getElementById('image1')
-          expect(image1.getAttribute('src')).toBeDefined()
+          expect(image1).toBeDefined()
           done()
         , false
 
@@ -90,17 +95,17 @@ describe 'Cloudinary', ()->
       img.appendTo(container)
       expect(img.attr('src')).toBeFalsy()
       cl.responsive()
-      expect(img.attr('src')).toEqual window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
+      expect(img.attr('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
       container.css 'width', 211
-      expect(img.attr('src')).toEqual window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
+      expect(img.attr('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
       $(window).resize()
       window.setTimeout (->
         # wait(200)
-        expect(img.attr('src')).toEqual window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
+        expect(img.attr('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
         container.css 'width', 101
         window.setTimeout (->
           # wait(200)
-          expect(img.attr('src')).toEqual window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
+          expect(img.attr('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
           done()
         ), 200
       ), 200
@@ -109,12 +114,27 @@ describe 'Cloudinary', ()->
       image1 = testDocument.getElementById('image1')
       src = image1.getAttribute('src')
       expect(src).toBeDefined()
-      currentWidth = src.match(/w_(\d+)/)[1]
+      currentWidth = src.match(/w_(auto:)?(breakpoints[_\d]*:)?(\d+)/)[3]
       handler = ()->
         src = image1.getAttribute('src')
+        expect(src).toBeDefined()
         newWidth = src.match(/w_(\d+)/)[1]
         expect(newWidth).toEqual currentWidth
         done()
       testWindow.addEventListener 'resize', handler
       testWindow.resizeBy(200,0)
 
+    describe "responsive_class", ->
+      it "should set the class used for responsive functionality", ->
+        img = cl.image( "sample", responsive: true, responsive_class: "cl-foobar")
+        expect(cloudinary.Util.hasClass(img, "cl-foobar")).toBeTruthy()
+
+describe 'Client side responsive', ->
+  describe 'client_hints', ->
+    describe 'false', ->
+      itBehavesLike 'client side responsive'
+    describe 'true', ->
+      beforeEach ->
+        cl.config().client_hints = true
+      itBehavesLike 'client side responsive'
+
diff --git a/test/spec/responsive-jquery-spec.js b/test/spec/responsive-jquery-spec.js
index dc4b2a4e..21b16824 100644
--- a/test/spec/responsive-jquery-spec.js
+++ b/test/spec/responsive-jquery-spec.js
@@ -1,7 +1,11 @@
-describe('Cloudinary', function() {
+sharedExamples('client side responsive', function() {
   var cl, defaultConfig;
+  if (navigator.userAgent.toLowerCase().indexOf('phantom') > -1) {
+    console.warn("Skipping responsive tests in PhantomJS");
+    return;
+  }
   defaultConfig = {
-    cloud_name: 'demo'
+    cloud_name: 'sdk-test'
   };
   cl = null;
   return describe("responsive", function() {
@@ -11,13 +15,18 @@ describe('Cloudinary', function() {
     container = void 0;
     testWindow = null;
     beforeAll(function(done) {
-      testWindow = window.open("responsive-jquery-test.html", "Cloudinary test " + ((new Date()).toLocaleString()), "width=500, height=500");
-      return testWindow.addEventListener('load', (function(_this) {
+      var testURL;
+      testURL = "responsive-jquery-test.html";
+      if (typeof __karma__ !== "undefined") {
+        testURL = "/base/test/docRoot/" + testURL;
+      }
+      testWindow = window.open(testURL, "Cloudinary test " + ((new Date()).toLocaleString()), "width=500, height=500");
+      return testWindow.addEventListener('karma-ready', (function(_this) {
         return function() {
           var image1;
           testDocument = testWindow.document;
           image1 = testDocument.getElementById('image1');
-          expect(image1.getAttribute('src')).toBeDefined();
+          expect(image1).toBeDefined();
           return done();
         };
       })(this), false);
@@ -94,28 +103,29 @@ describe('Cloudinary', function() {
       img.appendTo(container);
       expect(img.attr('src')).toBeFalsy();
       cl.responsive();
-      expect(img.attr('src')).toEqual(window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
+      expect(img.attr('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
       container.css('width', 211);
-      expect(img.attr('src')).toEqual(window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
+      expect(img.attr('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
       $(window).resize();
       return window.setTimeout((function() {
-        expect(img.attr('src')).toEqual(window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
+        expect(img.attr('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
         container.css('width', 101);
         return window.setTimeout((function() {
-          expect(img.attr('src')).toEqual(window.location.protocol + '//res.cloudinary.com/demo/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
+          expect(img.attr('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
           return done();
         }), 200);
       }), 200);
     });
-    return it("should not resize images with fixed width containers", function(done) {
+    it("should not resize images with fixed width containers", function(done) {
       var currentWidth, handler, image1, src;
       image1 = testDocument.getElementById('image1');
       src = image1.getAttribute('src');
       expect(src).toBeDefined();
-      currentWidth = src.match(/w_(\d+)/)[1];
+      currentWidth = src.match(/w_(auto:)?(breakpoints[_\d]*:)?(\d+)/)[3];
       handler = function() {
         var newWidth;
         src = image1.getAttribute('src');
+        expect(src).toBeDefined();
         newWidth = src.match(/w_(\d+)/)[1];
         expect(newWidth).toEqual(currentWidth);
         return done();
@@ -123,6 +133,30 @@ describe('Cloudinary', function() {
       testWindow.addEventListener('resize', handler);
       return testWindow.resizeBy(200, 0);
     });
+    return describe("responsive_class", function() {
+      return it("should set the class used for responsive functionality", function() {
+        var img;
+        img = cl.image("sample", {
+          responsive: true,
+          responsive_class: "cl-foobar"
+        });
+        return expect(cloudinary.Util.hasClass(img, "cl-foobar")).toBeTruthy();
+      });
+    });
+  });
+});
+
+describe('Client side responsive', function() {
+  return describe('client_hints', function() {
+    describe('false', function() {
+      return itBehavesLike('client side responsive');
+    });
+    return describe('true', function() {
+      beforeEach(function() {
+        return cl.config().client_hints = true;
+      });
+      return itBehavesLike('client side responsive');
+    });
   });
 });
 
diff --git a/test/spec/responsive-jquery-spec.js.map b/test/spec/responsive-jquery-spec.js.map
index 0919eac4..f8c3369d 100644
--- a/test/spec/responsive-jquery-spec.js.map
+++ b/test/spec/responsive-jquery-spec.js.map
@@ -6,5 +6,5 @@
     "responsive-jquery-spec.coffee"
   ],
   "names": [],
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\ No newline at end of file
diff --git a/test/spec/responsive-shrinkwrap-spec.coffee b/test/spec/responsive-shrinkwrap-spec.coffee
new file mode 100644
index 00000000..904b48f1
--- /dev/null
+++ b/test/spec/responsive-shrinkwrap-spec.coffee
@@ -0,0 +1,144 @@
+sharedExamples 'client side responsive', ->
+  if navigator.userAgent.toLowerCase().indexOf('phantom') > -1
+    console.warn("Skipping responsive tests in PhantomJS")
+    return
+  defaultConfig = cloud_name: 'sdk-test'
+  cl = null
+  describe "responsive", ()->
+    fixtureContainer = undefined
+    testDocument = null
+    container = undefined
+    testWindow = null
+
+    beforeAll (done)->
+      # Open a new window with test HTML. A dynamic title is required in order to open a *new* window each time even if
+      # previous window was not closed.
+      testURL = "responsive-shrinkwrap-test.html"
+      testURL = "/base/test/docRoot/#{testURL}" if typeof __karma__ != "undefined"
+      testWindow = window.open(testURL, "Cloudinary test #{(new Date()).toLocaleString()}", "width=500, height=500")
+      testWindow.addEventListener 'karma-ready', ()=>
+          testDocument = testWindow.document
+          image1 = testDocument.getElementById('image1')
+          expect(image1).toBeDefined()
+          done()
+        , false
+
+    afterAll ()->
+      testWindow.close()
+
+    beforeEach ()->
+      cl = new cloudinary.Cloudinary(defaultConfig)
+      fixtureContainer = document.createElement('div')
+      fixtureContainer.id="fixture";
+      document.body.appendChild(fixtureContainer)
+
+    afterEach ()->
+      fixtureContainer.remove()
+
+    triggerResize = (window)->
+      evt = window.document.createEvent('UIEvents')
+      evt.initUIEvent 'resize', true, false, window, 0
+      window.dispatchEvent evt
+
+    it 'should traverse up the DOM to find a parent that has clientWidth', ->
+      aContainer = undefined
+      divContainer = undefined
+      img = undefined
+      divContainer = document.createElement('div')
+      divContainer.style.width = 101
+      fixtureContainer.appendChild(divContainer)
+      aContainer = document.createElement('a')
+      divContainer.appendChild( aContainer)
+      img = cl.image('sample.jpg',
+        width: 'auto'
+        dpr: 'auto'
+        crop: 'scale'
+        responsive: true
+      )
+      aContainer.appendChild(img)
+      cl.responsive()
+      expect(img.getAttribute('src')).not.toEqual undefined
+
+    it 'should compute breakpoints correctly', ()->
+      el = document.createElement('img')
+      fixtureContainer.appendChild(el)
+      expect(cl.calc_breakpoint(el, 1)).toEqual 100
+      expect(cl.calc_breakpoint(el, 10)).toEqual 100
+      expect(cl.calc_breakpoint(el, 110)).toEqual 200
+      cl.config('breakpoints', [
+        50
+        150
+      ])
+      expect(cl.calc_breakpoint(el, 1)).toEqual 50
+      expect(cl.calc_breakpoint(el, 100)).toEqual 150
+      expect(cl.calc_breakpoint(el, 180)).toEqual 150
+
+      cl.config 'breakpoints', (width) ->
+        width / 2
+
+      expect(cl.calc_breakpoint(el, 100)).toEqual 50
+
+      el.setAttribute( 'data-breakpoints', '70,140')
+      expect(cl.calc_breakpoint(el, 1)).toEqual 70
+      expect(cl.calc_breakpoint(el, 100)).toEqual 140
+
+    it 'should correctly resize responsive images', (done) ->
+      container = undefined
+      img = undefined
+      dpr = cl.device_pixel_ratio()
+      container = document.createElement('div')
+      container.style.width = "101px"
+      fixtureContainer.appendChild(container)
+      img = cl.image('sample.jpg',
+          width: 'auto'
+          dpr: 'auto'
+          crop: 'scale'
+          responsive: true)
+      container.appendChild(img)
+      expect(img.getAttribute('src')).toBeFalsy()
+      expect(cloudinary.Util.hasClass(img, 'cld-responsive')).toBeTruthy()
+      cl.responsive()
+      expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
+      container.style.width = "211px"
+      expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg'
+      triggerResize window
+      window.setTimeout ()->
+          # wait(200)
+          expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
+          container.style.width = "101px"
+          window.setTimeout ()->
+              # wait(200)
+              expect(img.getAttribute('src')).toEqual window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg'
+              done()
+            , 200
+        , 200
+
+    it "should not resize images with fixed width containers", (done)->
+      image1 = testDocument.getElementById('image1')
+      src = image1.getAttribute('src')
+      expect(src).toBeDefined()
+      expect(src).not.toBe('')
+      currentWidth = src.match(/w_(auto:)?(breakpoints[_\d]*:)?(\d+)/)[3]
+      handler = ()->
+        src = image1.getAttribute('src')
+        expect(src).toBeDefined()
+        newWidth = src.match(/w_(\d+)/)[1]
+        expect(newWidth).toEqual currentWidth
+        done()
+      testWindow.addEventListener 'resize', handler
+      testWindow.resizeBy(200,0)
+
+    describe "responsive_class", ->
+      it "should set the class used for responsive functionality", ->
+        img = cl.image( "sample", responsive: true, responsive_class: "cl-foobar")
+        expect(cloudinary.Util.hasClass(img, "cl-foobar")).toBeTruthy()
+
+describe 'Client side responsive', ->
+  describe 'client_hints', ->
+    describe 'false', ->
+      itBehavesLike 'client side responsive'
+    describe 'true', ->
+      beforeEach ->
+        cl.config().client_hints = true
+      itBehavesLike 'client side responsive'
+
diff --git a/test/spec/responsive-shrinkwrap-spec.js b/test/spec/responsive-shrinkwrap-spec.js
new file mode 100644
index 00000000..46457378
--- /dev/null
+++ b/test/spec/responsive-shrinkwrap-spec.js
@@ -0,0 +1,167 @@
+sharedExamples('client side responsive', function() {
+  var cl, defaultConfig;
+  if (navigator.userAgent.toLowerCase().indexOf('phantom') > -1) {
+    console.warn("Skipping responsive tests in PhantomJS");
+    return;
+  }
+  defaultConfig = {
+    cloud_name: 'sdk-test'
+  };
+  cl = null;
+  return describe("responsive", function() {
+    var container, fixtureContainer, testDocument, testWindow, triggerResize;
+    fixtureContainer = void 0;
+    testDocument = null;
+    container = void 0;
+    testWindow = null;
+    beforeAll(function(done) {
+      var testURL;
+      testURL = "responsive-shrinkwrap-test.html";
+      if (typeof __karma__ !== "undefined") {
+        testURL = "/base/test/docRoot/" + testURL;
+      }
+      testWindow = window.open(testURL, "Cloudinary test " + ((new Date()).toLocaleString()), "width=500, height=500");
+      return testWindow.addEventListener('karma-ready', (function(_this) {
+        return function() {
+          var image1;
+          testDocument = testWindow.document;
+          image1 = testDocument.getElementById('image1');
+          expect(image1).toBeDefined();
+          return done();
+        };
+      })(this), false);
+    });
+    afterAll(function() {
+      return testWindow.close();
+    });
+    beforeEach(function() {
+      cl = new cloudinary.Cloudinary(defaultConfig);
+      fixtureContainer = document.createElement('div');
+      fixtureContainer.id = "fixture";
+      return document.body.appendChild(fixtureContainer);
+    });
+    afterEach(function() {
+      return fixtureContainer.remove();
+    });
+    triggerResize = function(window) {
+      var evt;
+      evt = window.document.createEvent('UIEvents');
+      evt.initUIEvent('resize', true, false, window, 0);
+      return window.dispatchEvent(evt);
+    };
+    it('should traverse up the DOM to find a parent that has clientWidth', function() {
+      var aContainer, divContainer, img;
+      aContainer = void 0;
+      divContainer = void 0;
+      img = void 0;
+      divContainer = document.createElement('div');
+      divContainer.style.width = 101;
+      fixtureContainer.appendChild(divContainer);
+      aContainer = document.createElement('a');
+      divContainer.appendChild(aContainer);
+      img = cl.image('sample.jpg', {
+        width: 'auto',
+        dpr: 'auto',
+        crop: 'scale',
+        responsive: true
+      });
+      aContainer.appendChild(img);
+      cl.responsive();
+      return expect(img.getAttribute('src')).not.toEqual(void 0);
+    });
+    it('should compute breakpoints correctly', function() {
+      var el;
+      el = document.createElement('img');
+      fixtureContainer.appendChild(el);
+      expect(cl.calc_breakpoint(el, 1)).toEqual(100);
+      expect(cl.calc_breakpoint(el, 10)).toEqual(100);
+      expect(cl.calc_breakpoint(el, 110)).toEqual(200);
+      cl.config('breakpoints', [50, 150]);
+      expect(cl.calc_breakpoint(el, 1)).toEqual(50);
+      expect(cl.calc_breakpoint(el, 100)).toEqual(150);
+      expect(cl.calc_breakpoint(el, 180)).toEqual(150);
+      cl.config('breakpoints', function(width) {
+        return width / 2;
+      });
+      expect(cl.calc_breakpoint(el, 100)).toEqual(50);
+      el.setAttribute('data-breakpoints', '70,140');
+      expect(cl.calc_breakpoint(el, 1)).toEqual(70);
+      return expect(cl.calc_breakpoint(el, 100)).toEqual(140);
+    });
+    it('should correctly resize responsive images', function(done) {
+      var dpr, img;
+      container = void 0;
+      img = void 0;
+      dpr = cl.device_pixel_ratio();
+      container = document.createElement('div');
+      container.style.width = "101px";
+      fixtureContainer.appendChild(container);
+      img = cl.image('sample.jpg', {
+        width: 'auto',
+        dpr: 'auto',
+        crop: 'scale',
+        responsive: true
+      });
+      container.appendChild(img);
+      expect(img.getAttribute('src')).toBeFalsy();
+      expect(cloudinary.Util.hasClass(img, 'cld-responsive')).toBeTruthy();
+      cl.responsive();
+      expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
+      container.style.width = "211px";
+      expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_200/sample.jpg');
+      triggerResize(window);
+      return window.setTimeout(function() {
+        expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
+        container.style.width = "101px";
+        return window.setTimeout(function() {
+          expect(img.getAttribute('src')).toEqual(window.location.protocol + '//res.cloudinary.com/sdk-test/image/upload/c_scale,dpr_' + dpr + ',w_300/sample.jpg');
+          return done();
+        }, 200);
+      }, 200);
+    });
+    it("should not resize images with fixed width containers", function(done) {
+      var currentWidth, handler, image1, src;
+      image1 = testDocument.getElementById('image1');
+      src = image1.getAttribute('src');
+      expect(src).toBeDefined();
+      expect(src).not.toBe('');
+      currentWidth = src.match(/w_(auto:)?(breakpoints[_\d]*:)?(\d+)/)[3];
+      handler = function() {
+        var newWidth;
+        src = image1.getAttribute('src');
+        expect(src).toBeDefined();
+        newWidth = src.match(/w_(\d+)/)[1];
+        expect(newWidth).toEqual(currentWidth);
+        return done();
+      };
+      testWindow.addEventListener('resize', handler);
+      return testWindow.resizeBy(200, 0);
+    });
+    return describe("responsive_class", function() {
+      return it("should set the class used for responsive functionality", function() {
+        var img;
+        img = cl.image("sample", {
+          responsive: true,
+          responsive_class: "cl-foobar"
+        });
+        return expect(cloudinary.Util.hasClass(img, "cl-foobar")).toBeTruthy();
+      });
+    });
+  });
+});
+
+describe('Client side responsive', function() {
+  return describe('client_hints', function() {
+    describe('false', function() {
+      return itBehavesLike('client side responsive');
+    });
+    return describe('true', function() {
+      beforeEach(function() {
+        return cl.config().client_hints = true;
+      });
+      return itBehavesLike('client side responsive');
+    });
+  });
+});
+
+//# sourceMappingURL=responsive-shrinkwrap-spec.js.map
diff --git a/test/spec/responsive-shrinkwrap-spec.js.map b/test/spec/responsive-shrinkwrap-spec.js.map
new file mode 100644
index 00000000..b7eca6ac
--- /dev/null
+++ b/test/spec/responsive-shrinkwrap-spec.js.map
@@ -0,0 +1,10 @@
+{
+  "version": 3,
+  "file": "responsive-shrinkwrap-spec.js",
+  "sourceRoot": "",
+  "sources": [
+    "responsive-shrinkwrap-spec.coffee"
+  ],
+  "names": [],
+  "mappings": 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+}
\ No newline at end of file
diff --git a/test/spec/tagspec.coffee b/test/spec/tagspec.coffee
index 39e6626c..f8e1ed31 100644
--- a/test/spec/tagspec.coffee
+++ b/test/spec/tagspec.coffee
@@ -33,7 +33,7 @@ sharedExamples "client_hints", (options)->
     expect(tag).toMatch( /<img.*>/)
     expect(tag).not.toMatch(/<.*class.*>/)
     expect(cloudinary.Util.getData(image, "src")).toBeFalsy()
-    expect(tag).toMatch( /src=["']http:\/\/res.cloudinary.com\/test\/image\/upload\/c_scale,dpr_auto,w_auto\/sample.jpg["']/)
+    expect(tag).toMatch( /src=["']http:\/\/res.cloudinary.com\/sdk-test\/image\/upload\/c_scale,dpr_auto,w_auto\/sample.jpg["']/)
   it "should override responsive", ->
     cl.config().responsive = true
     image = cl.image('sample.jpg', options)
@@ -41,7 +41,7 @@ sharedExamples "client_hints", (options)->
     expect(tag).toMatch( /<img.*>/)
     expect(tag).not.toMatch(/<.*class.*>/)
     expect(cloudinary.Util.getData(image, "src")).toBeFalsy()
-    expect(tag).toMatch( /src=["']http:\/\/res.cloudinary.com\/test\/image\/upload\/c_scale,dpr_auto,w_auto\/sample.jpg["']/)
+    expect(tag).toMatch( /src=["']http:\/\/res.cloudinary.com\/sdk-test\/image\/upload\/c_scale,dpr_auto,w_auto\/sample.jpg["']/)
 
 describe "Cloudinary.ImageTag", ->
   config =
@@ -55,24 +55,24 @@ describe "Cloudinary.ImageTag", ->
     expect(tag).toBe("<img src=\"#{DEFAULT_UPLOAD_PATH}image_id\">")
   describe ":client_hints", ->
     describe "as option", ->
-      includeContext "client_hints", {dpr: "auto", cloud_name: "test", width: "auto", crop: "scale", client_hints: true}
+      includeContext "client_hints", {dpr: "auto", cloud_name: "sdk-test", width: "auto", crop: "scale", client_hints: true}
     describe "as global configuration", ->
       beforeEach ->
         cl.config().client_hints = true
-      includeContext "client_hints", {dpr: "auto", cloud_name: "test", width: "auto", crop: "scale"}
+      includeContext "client_hints", {dpr: "auto", cloud_name: "sdk-test", width: "auto", crop: "scale"}
 
     describe "false", ->
       it "should use normal responsive behaviour", ->
         cl.config().responsive = true
-        image = cl.image('sample.jpg', {width: "auto", crop: "scale", cloud_name: "test", client_hints: false})
+        image = cl.image('sample.jpg', {width: "auto", crop: "scale", cloud_name: "sdk-test", client_hints: false})
         tag = image.outerHTML
         expect(tag).toMatch( /<img.*>/)
         expect(tag).toMatch( /class=["']cld-responsive["']/)
-        expect(cloudinary.Util.getData(image, "src-cache")).toMatch( /http:\/\/res.cloudinary.com\/test\/image\/upload\/c_scale,w_auto\/sample.jpg/)
+        expect(cloudinary.Util.getData(image, "src-cache")).toMatch( /http:\/\/res.cloudinary.com\/sdk-test\/image\/upload\/c_scale,w_auto\/sample.jpg/)
     describe "width", ->
       it "supports auto width", ->
-        tag = cl.image( 'sample.jpg', {crop: "scale", dpr: "auto", cloud_name: "test", width: "auto:breakpoints", client_hints: true}).outerHTML
-        expect(tag).toMatch( /src=["']http:\/\/res.cloudinary.com\/test\/image\/upload\/c_scale,dpr_auto,w_auto:breakpoints\/sample.jpg["']/)
+        tag = cl.image( 'sample.jpg', {crop: "scale", dpr: "auto", cloud_name: "sdk-test", width: "auto:breakpoints", client_hints: true}).outerHTML
+        expect(tag).toMatch( /src=["']http:\/\/res.cloudinary.com\/sdk-test\/image\/upload\/c_scale,dpr_auto,w_auto:breakpoints\/sample.jpg["']/)
     
 
 describe "Cloudinary.VideoTag", ->
diff --git a/test/spec/tagspec.js b/test/spec/tagspec.js
index b4f474d2..40f1ecde 100644
--- a/test/spec/tagspec.js
+++ b/test/spec/tagspec.js
@@ -57,7 +57,7 @@ sharedExamples("client_hints", function(options) {
     expect(tag).toMatch(/<img.*>/);
     expect(tag).not.toMatch(/<.*class.*>/);
     expect(cloudinary.Util.getData(image, "src")).toBeFalsy();
-    return expect(tag).toMatch(/src=["']http:\/\/res.cloudinary.com\/test\/image\/upload\/c_scale,dpr_auto,w_auto\/sample.jpg["']/);
+    return expect(tag).toMatch(/src=["']http:\/\/res.cloudinary.com\/sdk-test\/image\/upload\/c_scale,dpr_auto,w_auto\/sample.jpg["']/);
   });
   return it("should override responsive", function() {
     var image, tag;
@@ -67,7 +67,7 @@ sharedExamples("client_hints", function(options) {
     expect(tag).toMatch(/<img.*>/);
     expect(tag).not.toMatch(/<.*class.*>/);
     expect(cloudinary.Util.getData(image, "src")).toBeFalsy();
-    return expect(tag).toMatch(/src=["']http:\/\/res.cloudinary.com\/test\/image\/upload\/c_scale,dpr_auto,w_auto\/sample.jpg["']/);
+    return expect(tag).toMatch(/src=["']http:\/\/res.cloudinary.com\/sdk-test\/image\/upload\/c_scale,dpr_auto,w_auto\/sample.jpg["']/);
   });
 });
 
@@ -89,7 +89,7 @@ describe("Cloudinary.ImageTag", function() {
     describe("as option", function() {
       return includeContext("client_hints", {
         dpr: "auto",
-        cloud_name: "test",
+        cloud_name: "sdk-test",
         width: "auto",
         crop: "scale",
         client_hints: true
@@ -101,7 +101,7 @@ describe("Cloudinary.ImageTag", function() {
       });
       return includeContext("client_hints", {
         dpr: "auto",
-        cloud_name: "test",
+        cloud_name: "sdk-test",
         width: "auto",
         crop: "scale"
       });
@@ -113,13 +113,13 @@ describe("Cloudinary.ImageTag", function() {
         image = cl.image('sample.jpg', {
           width: "auto",
           crop: "scale",
-          cloud_name: "test",
+          cloud_name: "sdk-test",
           client_hints: false
         });
         tag = image.outerHTML;
         expect(tag).toMatch(/<img.*>/);
         expect(tag).toMatch(/class=["']cld-responsive["']/);
-        return expect(cloudinary.Util.getData(image, "src-cache")).toMatch(/http:\/\/res.cloudinary.com\/test\/image\/upload\/c_scale,w_auto\/sample.jpg/);
+        return expect(cloudinary.Util.getData(image, "src-cache")).toMatch(/http:\/\/res.cloudinary.com\/sdk-test\/image\/upload\/c_scale,w_auto\/sample.jpg/);
       });
     });
     return describe("width", function() {
@@ -128,11 +128,11 @@ describe("Cloudinary.ImageTag", function() {
         tag = cl.image('sample.jpg', {
           crop: "scale",
           dpr: "auto",
-          cloud_name: "test",
+          cloud_name: "sdk-test",
           width: "auto:breakpoints",
           client_hints: true
         }).outerHTML;
-        return expect(tag).toMatch(/src=["']http:\/\/res.cloudinary.com\/test\/image\/upload\/c_scale,dpr_auto,w_auto:breakpoints\/sample.jpg["']/);
+        return expect(tag).toMatch(/src=["']http:\/\/res.cloudinary.com\/sdk-test\/image\/upload\/c_scale,dpr_auto,w_auto:breakpoints\/sample.jpg["']/);
       });
     });
   });
diff --git a/test/spec/tagspec.js.map b/test/spec/tagspec.js.map
index 2793a3c0..688ef135 100644
--- a/test/spec/tagspec.js.map
+++ b/test/spec/tagspec.js.map
@@ -6,5 +6,5 @@
     "tagspec.coffee"
   ],
   "names": [],
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 }
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