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How to dynamically introduce JS files

php中世界最好的语言
Release： 2018-05-23 14:43:03
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This time I will show you how to dynamically introduce JS files. What are theprecautions for dynamically introducing JS files? Here are practical cases, let’s take a look.

index.html
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test.js

alert("hello! I am test.js"); var str="1";
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dynamic.js

//第一种方式：直接document.write 但这样会把当前的页面全覆写掉 //document.write("