How to load jquery.js inside JS file

This time I will show you how to load jquery.js in a JS file, and what are theprecautionson how to load jquery.js in a JS file. The following is a practical case, let's take a look.

There is a requirement recently:

1. Only one JS file can be introduced into an html, and no JS code or other JS files can be introduced;

2. This JS Other JS files must be introduced into the file;

3. All JS functions are written in this JS file. These codes use jquery-related stuff, so the first thing that needs to be solved here is how to introduce jquery. js.

Searchedon the Internet and many methods were not very practical. Since I have been away from the WEB for many years, I finally asked a friend and got the following code:

1.js

// by firefoxmmx var script=document.createElement("script"); script.type="text/javascript"; script.src="jquery.js"; document.getElementsByTagName('head')[0].appendChild(script); setTimeout(function(){ $(document).ready(function(){ $("#bt").click(function(){ alert('Hello World'); }); }); },100);

1.html code is as follows:

Here are some methods from the Internet:

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