Ajax-hook 原理解析 注入js

wendux/Ajax-hook
Ajax-hook 原理解析
Js 拦截全局ajax请求
js实用方法记录-js动态加载css、js脚本文件
js 拦截全局 ajax 请求
JavaScript、ES5和ES6的介绍和区别

    function dynamicLoadJs(url, callback) {
        var head = document.getElementsByTagName('head')[0];
        var script = document.createElement('script');
        script.type = 'text/javascript';
        script.src = url;
        if(typeof(callback)=='function'){
            script.onload = script.onreadystatechange = function () {
                if (!this.readyState || this.readyState === "loaded" || this.readyState === "complete"){
                    callback();
                    script.onload = script.onreadystatechange = null;
                }
            };
        }
        head.appendChild(script);
    };dynamicLoadJs('https://unpkg.com/ajax-hook/dist/ajaxhook.min.js',function(){alert('加载成功')});