QA不是万能的,用户的浏览环境非常复杂,很多情况无法靠测试用例去覆盖,所以最好建立一个前端错误日志,在真实用户端收集bug. try&catch是一个捕获前端错误的常见方法,比如: { //给所有脚本设置一个统一入口,比如设置一个init函数 init(); }catch(e){ //处理错误,将错误信息上报给服务器 } 像上面这样,所有脚本统一用init作为入口,一旦发生错误就会被try捕获,然后交给catch去处理. 这种做法虽然能够收集错误信息,但弊端是必须统一一个脚本入口,并且把入口放在…

当在firefox浏览器的a.htm页面中使用script标签加载某a.js出错时,如果放置window.onerror事件处理方法时,此方法获取到的错误信息都是固定的: {0:"Script error.",1:"file:///C:/Users/Administrator/Desktop/htm/js/debug.js",2:0} 而在ie下面却是 {0:"“dddddd”未定义",1:"file:///C:/Users/Admin…

详见: http://blog.yemou.net/article/query/info/tytfjhfascvhzxcytp75   window.onerror = function(sMessage,sUrl,sLine){}; onerror函数的三个参数用于确定错误确切的信息,代表的意思依次为:错误信息:发生错误的文件:发生错误的行号. 示例: <SCRIPT> window.onerror=fnErrorTrap; function fnErrorTrap(sMsg,sUrl,sL…

What the heck is "Script error"? Ben Vinegar/ May 17, 2016 If you’ve done any work with the JavaScript onerror event before, you’ve probably come across the following: "Script error." “Script error” is what browsers send to the onerror…

本文翻译youtube上的up主kudvenkat的javascript tutorial播放单 源地址在此: https://www.youtube.com/watch?v=PMsVM7rjupU&list=PL6n9fhu94yhUA99nOsJkKXBqokT3MBK0b 总的来说,在Javascript中我们用try/catch语句来获取错误.如果一个错误不是由try..catch语句块捕捉的话,那么则会发出一个onerror事件. 当一个错误如下例中一样出现后,我们想要将一个函数赋给w…

Event reference:      https://developer.mozilla.org/en-US/docs/Web/Events http://w3c.github.io/html/webappapis.html#events 原文: https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onerror An event handler for the error event. Error ev…

//[捕捉所有前端error] window.onerror = function (errormessage, url, line, column, error) { console.log("======================================================================") console.log("url:{0}".replace('{0}', url)) console.log("err…

var doc = document.body || document.documentElement; var _onerror = Onerror(''); var Onerror = function(url){ this.init(url); } Onerror.prototype.init = function(url){ this.url = url; this.system = this._system(); this.browser = this._browser(); this…

原文: http://stackoverflow.com/questions/19141195/how-can-we-listen-for-errors-that-do-not-trigger-window-onerror window.onerror is triggered whether it was a syntax or runtime error. This page from quirksmode has lists of what error events it will and…

原文:https://blog.sentry.io/2016/01/04/client-javascript-reporting-window-onerror.html onerror is a special browser event that fires whenever an uncaught JavaScript error has been thrown. It’s one of the easiest ways to log client-side errors and repor…