1 /*
2 loadFile(data, callback): 动态加载js文件
3 data: 存放需要加载的js文件的url("url" || ["url", "url"])
4 callback: 加载完成回调函数
5 */
6 function loadFile(data, callback){
7 if(!data){return;}
8 let k, arr = [], el = document.body;
9 if(typeof(data) === 'string'){arr.push(data);}
10 else if(Array.isArray(data) === true){for(k in data){arr.push(data[k]);}}
11 else{return;}
12
13 let load = (url, suc, err)=>{
14 let script = document.createElement('script');
15 script.type = "text/javascript";//type = 'module';
16 script.src = url;
17 el.appendChild(script);
18 script.onload = function (e){if(typeof(suc) === "function"){suc(e);}}
19 script.onerror = function (e){if(typeof(err) === "function"){err(e);}}
20 }
21
22 let timeout = ()=>{
23 if(t === len){if(typeof(callback) === "function"){callback(t, len, arr);} return;}
24 setTimeout(timeout, 1000);
25 }
26
27 let len = arr.length, t = 0;
28 for(k in arr){load(arr[k], (e)=>{t++;});}
29 timeout();
30 }
31 //调用
32 loadFile("./main.js", (t, len, arr)=>{document.write(t+" "+len+" "+arr)});
33 loadFile(["./main.js", "./init.js"], (t, len, arr)=>{document.write(t+" "+len+" "+arr)});
