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copied!<pre class="lang-js prettyprint-override"><code>str = str.replace(/abc/g, ''); </code></pre> <p>In response to comment:</p> <pre class="lang-js prettyprint-override"><code>var find = 'abc'; var re = new RegExp(find, 'g'); str = str.replace(re, ''); </code></pre> <p>In response to <a href="https://stackoverflow.com/users/49153/click-upvote">Click Upvote</a>'s comment, you could simplify it even more:</p> <pre class="lang-js prettyprint-override"><code>function replaceAll(str, find, replace) { return str.replace(new RegExp(find, 'g'), replace); } </code></pre> <p><strong>Note:</strong> Regular expressions contain special (meta) characters, and as such it is dangerous to blindly pass an argument in the <code>find</code> function above without pre-processing it to escape those characters. This is covered in the <a href="https://developer.mozilla.org/en-US/" rel="noreferrer">Mozilla Developer Network</a>'s <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#Using_Special_Characters" rel="noreferrer">JavaScript Guide on Regular Expressions</a>, where they present the following utility function:</p> <pre class="lang-js prettyprint-override"><code>function escapeRegExp(str) { return str.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1"); } </code></pre> <p>So in order to make the <code>replaceAll()</code> function above safer, it could be modified to the following if you also include <code>escapeRegExp</code>:</p> <pre class="lang-js prettyprint-override"><code>function replaceAll(str, find, replace) { return str.replace(new RegExp(escapeRegExp(find), 'g'), replace); } </code></pre>

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