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This example
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script> <div id="test"></div> <script> $(document).ready(() => { $('#test').load('doesntmatter'); }); </script> seemed to me like it is identical to the examples for the ajax load function. As the code snippet can tell you, it actually errors out with
Uncaught TypeError: $(...).load is not a function What am I doing wrong?
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ajax is not a function" error occurs when loading the slim version of jQuery and trying to use the ajax function. The ajax function is excluded from the slim jQuery version. To solve the error load the regular jQuery version on your page.
The jQuery load() method is a simple, but powerful AJAX method. The load() method loads data from a server and puts the returned data into the selected element. Syntax: $(selector).
Basically, the most reliable way to check if jQuery has been loaded is to check typeof jQuery — it will return "function" if jQuery was already loaded on the page, or "undefined" if jQuery hasn't been loaded yet.
You may experience the “jQuery is not defined error” when jQuery is included but not loaded. Make sure that it's loaded by finding the script source and pasting the URL in a new browser or tab. The snippet of text you should look for to find the URL to test.
https://code.jquery.com/jquery-3.2.1.slim.min.js is the slim edition of jquery, which does not include ajax. slim is the default version included in an Express server. Use the full version of jquery at https://code.jquery.com/jquery-3.2.1.min.js
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