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Several methods of dynamically loading js_javascript skills

WBOY
WBOYOriginal
2016-05-16 19:25:021201browse

1. Direct document.write


2. Dynamically change the src attribute of the existing script



3. Dynamically create script elements




<script> <BR>document.write(<script src='test.js'><\/script>); <BR></script> <script></script><script> <BR>s1.src=test.js <BR></script> <script> <BR>var s2 = document.createElement(script); <BR>s2.src=test.js <BR>document.body.insertAdjacentElement(BeforeBegin,s2); <BR></script><script> <BR>function loadJs(file){ <BR>var scriptTag = document.getElementById('loadScript'); <BR>var head = document.getElementsByTagName('head').item(0) <BR>if(scriptTag) head.removeChild(scriptTag); <BR>script = document.createElement('script'); <BR>script.src = file; <BR>script.type = 'text/javascript'; <BR>script.id = 'loadScript'; <BR>head.appendChild(script) <BR>} <BR></script>
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