fix docs by wrapping emscripten module with custom webpack loader

Author: davidyuk

.gitignore

@@ -30,7 +30,3 @@ test/webpack/node_modules/
 test/webpack/dist/
 *.tgz
 package/
-em-pre_js_tracker.c
-libargon2_1_em-pre_js.a
-em-post_js_tracker.c
-libargon2_1_em-post_js.a

CMakeLists.txt

@@ -31,6 +31,3 @@ endif()
 add_executable(argon2 ${sources})
 
 set_target_properties(argon2 PROPERTIES OUTPUT_NAME ${OUTPUT_NAME})
-
-em_link_pre_js(argon2 lib/em-pre.js)
-em_link_post_js(argon2 lib/em-post.js)

lib/em-post.js

@@ -19,6 +19,11 @@ const getConfig = (inlineWasm) => ({
             test: /\.wasm$/,
             loader: inlineWasm ? 'base64-loader' : 'null-loader',
             type: 'javascript/auto',
+        }, {
+            test: /dist\/argon2\.js$/,
+            use: [{
+                loader: path.resolve('wrap-em.js'),
+            }]
         }],
     },
     externals: {

lib/em-pre.js

@@ -0,0 +1,16 @@
+module.exports = (em) => `
+module.exports = function (Module) {
+    Module = Module || {};
+    const module = undefined;
+
+${em}
+
+    Module.unloadRuntime = function() {
+        if (typeof self!=="undefined") delete self.Module;
+        Module = jsModule = wasmMemory = wasmTable = asm = buffer = HEAP8 = HEAPU8 =
+        HEAP16 = HEAPU16 = HEAP32 = HEAPU32 = HEAPF32 = HEAPF64 = undefined;
+        if (typeof module!=="undefined") delete module.exports;
+    };
+
+    return Module;
+}`;