JS 实现需要时加载js和css文件_html/css_WEB-ITnose
当我做前端开发时，我们会经常遇到这样的情况：我可能需要引入一些包做一些特殊的事情，可是这个包在部分的情况是用不到的。所以我们就希望在需要的时候再加载这个包。下面提供一个比较好的方法，用来动态加载这个js 和css文件
function $import(path,type,title){ var s,i; if(!type) type=path.substr(path.lastIndexOf(".")+1); if(type=="js"){ var ss=document.getElementsByTagName("script"); for(i=0;i<ss.length;i++){ if(ss[i].src && ss[i].src.indexOf(path)!=-1 || ss[i].title==title)return ss[i]; } s=document.createElement("script"); s.type="text/javascript"; s.src=path; if(title) s.title=title; }else if(type=="css"){ var ls=document.getElementsByTagName("link"); for(i=0;i<ls.length;i++){ if(ls[i].href && ls[i].href.indexOf(path)!=-1 || ls[i].title==title)return ls[i]; } s=document.createElement("link"); s.rel="stylesheet"; s.type="text/css"; s.href=path; if(title) s.title=title; s.disabled=false; } else return; var head=document.getElementsByTagName("head")[0]; head.appendChild(s); return s; }你只需要在调这个方法时，传入文件路径和文件类型（js， css）。这样就会在
标签里加包的导入
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