js 捕获全局错误 exception
window.onerror = handleError
function handleError(msg,url,l) {
var txt="There was an error on this page.\n" ;
txt+="Error: " + msg + "\n" ;
txt+="URL: " + url + "\n" ;
txt+="Line: " + l + "\n" ;
txt+="Click OK to continue.\n\n" ;
alert(txt);
return true;
}
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