如何测试window.onerror
处理程序?例如,如果我尝试throw 'Error2';
,则不会触发该事件。什么事件处理程序将对throw 'Error2';
做出反应,什么事件将触发window.onerror
?
comment for first answer
最佳答案
签入官方文档-https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onerror
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8'>
<meta http-equiv='X-UA-Compatible' content='IE=edge'>
<title>Page Title</title>
<meta name='viewport' content='width=device-width, initial-scale=1'>
<script>
window.onerror = function (msg, url, lineNo, columnNo, error) {
var string = msg.toLowerCase();
var substring = "script error";
if (string.indexOf(substring) > -1) {
alert('Script Error: See Browser Console for Detail');
} else {
var message = [
'Message: ' + msg,
'URL: ' + url,
'Line: ' + lineNo,
'Column: ' + columnNo,
'Error object: ' + JSON.stringify(error)
].join(' - ');
alert(message);
}
return false;
};
throw 'Error2';
</script>
</head>
<body>
</body>
</html>
关于javascript - 如何测试window.onerror处理程序,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/59320205/