油猴子 插入js 非文件頭加載 這樣可以動態配置加載啥

https://www.cnblogs.com/morang/p/dynamicloadjscssiframe.html
ajax全局事件

    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('加載成功')});