<script src="bootstrap-3.3.7/docs/assets/js/ie10-viewport-bug-workaround.js"></script>
<script data-main="js/main.js" src="js/lib/require.min.js"></script>
<script type="text/javascript">
window.onbeforeunload = function (e) {
var message = "";
e = e || window.event;
if (e) {
e.returnValue = message;
}
return message;
};
</script>
you can use window.onbeforeunload .
example:
window.onbeforeunload = function (e) {
e = e || window.event;
// IE8Firefox 4
if (e) {
e.returnValue = '';
}
// Chrome, Safari, Firefox 4+, Opera 12+ , IE 9+
return '';
};
Note: Chrome failure may be a version problem. Attach the change information starting from v51: Remove custom messages in onbeforeunload dialogs . It mentions "A window's onbeforeunload property no longer supports a custom string.." That is, custom strings are no longer supported.
is honored to be invited to answer.
I tried your own code and there are hints: chrome version 67.0.3396.87 (official version) will pop up, and this code already contains compatibility;
your own chrome is not good or other people's? Take a look at the version and whether the pop-up box is disabled: https://zhidao.baidu.com/ques.
chrome browser bug. It can be triggered as long as you open the console. Otherwise, it won't trigger.
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