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| var noop = function(){}; | |
| var errorHandler = { | |
| callback: null, | |
| init: function (callback) { | |
| errorHandler.callback = callback || noop; | |
| window.onerror = errorHandler.script; | |
| window.addEventListener('error', errorHandler.source, true); | |
| window.addEventListener('unhandledrejection', errorHandler.promise, true); | |
| }, | |
| // 记录普通错误 | |
| script: function (message, source, lineno, colno) { | |
| var stack = source + ':' + lineno + ':' + colno; | |
| errorHandler.callback('script', message, stack); | |
| }, | |
| // 记录资源加载错误 | |
| source: function (e) { | |
| e.preventDefault(); | |
| var target = e.target || e.srcElement; | |
| var isElementTarget = target instanceof HTMLScriptElement || target instanceof HTMLLinkElement || target instanceof HTMLImageElement; | |
| // 不是资源加载错误时，直接返回 | |
| if (!isElementTarget) { | |
| return false; | |
| } | |
| var url = target.src || target.href; | |
| errorHandler.callback('source', 'Unable to load resources', url); | |
| }, | |
| // 记录promise错误 | |
| promise: function (e) { | |
| e.preventDefault(); | |
| var error = e.reason || {}; | |
| errorHandler.callback('promise', error.message, error.stack); | |
| } | |
| }; |
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