JS记录错误日志/捕捉错误
//onerror提供异常信息,文件路径和发生错误代码的行数的三个参数。
window.onerror = function(e,url,index){ var msg = e.message || e|| "未知错误"; alert("错误信息:"+msg+",错误路径:"+ul+",行数:"+index); }
var logger = (function(){ var loghost = 'http://127.0.0.1/log.gif?'; var log = function(err){ var img = new Image(0,0); var _url =[]; _url.push('name'+'='+encodeURIComponent(err.name)); _url.push('message'+'='+encodeURIComponent(err.message)); _url.push('location'+'='+encodeURIComponent(err.location)); if(err.line) _url.push('line'+'='+encodeURIComponent(err.line)); if(err.func) _url.push('func'+'='+encodeURIComponent(err.func)); var url = _url.join('&'); img.src = loghost+url; console.log(img.src); } return {log:log}; })(); function trapError(msg, URI, ln) { // wrap our unknown error condition in an object var error = new Error(msg); error.location = URI; // add custom property error.line = ln; logger.log(error); warnUser(); return true; // stop the yellow triangle } window.onerror = trapError; function foo() { try { riskyOperation(); } catch (err) { // add custom property err.location = location.href; err.func = 'foo'; logger.log(err); warnUser(); } } function warnUser() { alert("An error has occurred while processing this page. Our engineers have been alerted!"); // do something } foo();