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8 lines
302 B
8 lines
302 B
6 years ago
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window.addEventListener( "beforeunload", (event)=>{
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// Cancel the event as stated by the standard.
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event.preventDefault();
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// Chrome requires returnValue to be set.
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event.returnValue = 'This is invision, not the site. Are you sure?';
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return 'This is invision, not the site. Are you sure?';
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} );
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