JQuery What is core.js (in jQuery 3.3.1) : <p>I just downloaded the latest version of jQuery via <code>npm install jquery</code> and it includes three uncompressed files namely:</p>

<pre><code>dist/core.js
dist/jquery.js
dist/jquery.slim.js
</code></pre>

<p><strong>I'm wondering what the core.js file is</strong> and couldn't find anything documented about it.  A google search on <strong>core.js</strong> and <strong>jquery core.js</strong> don't return relevant answers.</p>

<p>Also, I don't see any core.min.js.  So what is it?  Would I ever use it?  </p>

<p>NOTE: It uses define() which requires an AMD loader (see <a href="https://requirejs.org/docs/whyamd.html#definition" rel="noreferrer">https://requirejs.org/docs/whyamd.html#definition</a>
) so it can't just be included straight into an html file.</p>

<p>One jQuery CDN is at <a href="https://code.jquery.com" rel="noreferrer">https://code.jquery.com</a>, but it doesn't include core.js (from what I saw).</p>

<p>Looking at the code it only defines a small number of functions some of which are:</p>

<pre><code>extend, each, map, slice, first, last, eq, end
</code></pre>

<p>It looks like these are <strong>also</strong> defined in jquery.js and jquery.slim.js.</p>

<p>The jQuery documentation for <strong>core</strong> at <a href="https://api.jquery.com/category/core/" rel="noreferrer">https://api.jquery.com/category/core/</a> doesn't match what is in the core.js file.</p>
