showing results for - "js ask before close"
Nola
04 May 2016
1  window.onbeforeunload = function() {
2        return "";
3  }
Florian
02 Mar 2019
1<script>
2window.onbeforeunload = function (e) {
3    e = e || window.event;
4
5    // For IE and Firefox prior to version 4
6    if (e) {
7        e.returnValue = 'Sure?';
8    }
9
10    // For Safari
11    return 'Sure?';
12};
13</script>
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