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Detailed explanation of the method of loading jquery.js in JS
- php中世界最好的语言Original
- 2018-05-12 14:01:231845browse
This time I will bring you a detailed explanation of the method of loading jquery.js in JS. What are the precautions for loading jquery.js in JS. 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. I searched a lot of methods on the Internet but they are not very practical. Since I have left 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); The 1.html code is as follows:
<html> <head> <script type="text/javascript" src="1.js"></script> </head> <body> <input type="button" id="bt" value="Click" /> </body> </html>If you want to test, you need to add jquery.js. This can be downloaded by yourself.The effect of clicking the button after running is as shown below :
Here are some methods from the Internet:
1. Direct document.write<script language="javascript">
document.write("<script src='test.js'><\/script>");
</script> 2. Dynamically change the src attribute of an existing script
<script src='' id="s1"></script> <script language="javascript"> s1.src="test.js" </script>3. Dynamically create script elements
<script>
var oHead = document.getElementsByTagName('HEAD').item(0);
var oScript= document.createElement("script");
oScript.type = "text/javascript";
oScript.src="test.js";
oHead.appendChild( oScript);
</script> I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other php Chinese websites related articles! Recommended reading:
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