web前端|js教程
动态加载js
web前端-js教程
1.直接document.write
document.write();
2.动态改变已有script的src属性
s1.src=test.js
3.动态创建script元素
var s2 = document.createElement(script);
s2.src=test.js
document.body.insertAdjacentElement(BeforeBegin,s2);
function loadJs(file){
var scriptTag = document.getElementById(‘loadScript’);
var head = document.getElementsByTagName(‘head’).item(0)
if(scriptTag) head.removeChild(scriptTag);
script = document.createElement(‘script’);
script.src = file;
script.type = ‘text/javascript’;
script.id = ‘loadScript’;
head.appendChild(script)
}
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