feat: export replace.createSearchRegExp function

Author: jedwards1211

README.md

@@ -65,3 +65,9 @@ a `RegExp` without the `g` (global) flag.
 ## Acknowledgements
 
 Thanks to Nathan Bubna for his [`case`](https://github.com/nbubna/Case) package, which powers `preserve-case`!
+
+### `replace.createSearchRegExp(query, [options])`
+
+Creates a `RegExp` that matches for any case of the given `query` string.
+Like the other functions, `options.caseTypes` defaults to all types built into
+the [`case`](https://github.com/nbubna/Case) package.

lib/index.js

@@ -39,13 +39,17 @@ function doReplace(str, query, replacement) {
 }
 
 function replace(str, query, replacement, options) {
-  var caseTypes = options && options.caseTypes || Case._.types
   if (typeof query === 'string') {
-    query = new RegExp(caseTypes.map(function (type) { return Case[type](query) }).join('|'))
+    query = replace.createSearchRegExp(query, options)
   }
   return doReplace(str, query, replacement)
 }
 
+replace.createSearchRegExp = function createSearchRegExp(query, options) {
+  var caseTypes = options && options.caseTypes || Case._.types
+  return new RegExp(caseTypes.map(function (type) { return Case[type](query) }).join('|'))
+}
+
 replace.all = function replaceAll(str, query, replacement, options) {
   var caseTypes = options && options.caseTypes || Case._.types
   if (query instanceof RegExp) {