Regarding the $('body').append() piece of html code, writing it on the page can trigger an event, but writing it in a js file will not_html/css

$('body').prepend('<div id='nav' class='navbar'><div class='navbar-content'><a href='/' class='element'><span class='icon-grid-view'></span> 后台管理 <sup>1.0 Beta</sup></a> <span class='element-divider'></span> <a class='pull-menu' href='#'></a><div class='no-tablet-portrait'><div class='element place-right'><a class='dropdown-toggle' href='#'><span id='spanUser'>刁静?2</span><span class='icon-user-2'></span></a><ul class='dropdown-menu place-right' data-role='dropdown'><li><a href='#'>密码修改</a></li></ul></div><span class='element-divider place-right'></span></div></div></div>');

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For the same piece of code, if I write this js directly on the page, it is absolutely fine. But if I write it in a js file (this js file was introduced later than the UI framework js), this code only renders the style, but the event has no effect at all.

For example, in the picture, after clicking on the user, a drop-down menu will pop up.
If js is written in the page, click "↓" and the "Change Password" menu will pop up
But if js is written in a separate js file, and then import this js file, click "↓" and nothing will happen reflect.

What could be causing this?

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This depends on the loading order of js files

This js file was introduced later than the UI framework js)

In this way, you will miss the initialization event in the framework code

this js files were introduced later than the UI framework js)

In this way, you miss the initialization event in the framework code

I don’t understand it at all

    <link href="css/UI.css" rel="stylesheet" />    <script src="js/UI.js"></script><body></body><script type="text/javascript">$("body").append()</script>

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Now you can write it like this, and then I will change the

Regarding the $('body').append() piece of html code, writing it on the page can trigger an event, but writing it in a js file will not_html/css_WEB-ITnose

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