17 February 2015

Confirmation alert on before closing browser tab using Javascript

Today i'm going to tell you one small and basic javascript snippet for alert confirmation on browser closing time. i recently used whats app web that time before closing my session that asks me confirmation alert navigation. like that more sites are using this kind of confirm navigation on before closing browser tab, and it is mostly coming in form submission time, without filling the full form people trying to close or refreshing tab that time this kind of alert navigation will come. so let see the code for that suing javascript.

DOWNLOAD LIVE DEMO

Like the above image you may get some where while you surfing any where on internet. that is running by javascript.

JAVASCRIPT

<script>
window.onbeforeunload = function (example) {
   example = example || window.event;
   // For IE and Firefox prior to version 4
   if (example) {
      example.returnValue = 'Are you sure you want to close the Tab?';
   }
   // For Safari
   return 'Are you sure you want to close the Tab?';
};
</script>