javascript - The same page, but accessed through different domain names, displays different js content

Question

The content displayed after viewing the source code under the two domain names is the same, but the content of the same js is different.

Answer 1

It can be controlled by taking template variables. Once the host information is stored in the session, it can be judged by this lai

Answer 2

<script src="a.js" id='js1'></script>
//方式1 （改变src的连接）
window.onload=function(){
    var js1=document.getElementById('js1');
    if(window.location.href.indexOf('a.com')!==-1){
        js1.setAttribute('src','a.js')
    }
    else{
        js1.setAttribute('src','b.js')
    }
}
//方式2 （添加script的标签）
window.onload=function(){
    var js1=document.createElement('script');
    if(window.location.href.indexOf('a.com')!==-1){
        js1.setAttribute('src','a.js')
    }
    else{
        js1.setAttribute('src','b.js')
    }
    document.body.appendChild(js1);
}

Answer 3

Write a public js code on the page: Determine the accessed domain name: a.com or b.com/ According to different accessed domain names---Dynamicly create different js files and import them into the directory and then introduce them into the dom
var jsFile = document.createElement("script");

    jsFile .src = "a.js";///或 b.js
    document.head.insertBefore(jsFile , document.head.childNodes[0]);//根据自己的页面需要 放到什么位置