Detect Page Start and Navigation Away in jQuery

Posted by Mr PHP on

This quick snippet of jQuery that will allow you to so do something before the user navigates away from a page or closes the browser or tab.

In this example I have mixed in some JavaScript Date functionality to give a timer of how long you were on the page.

// get the starting date
var start = new Date();
var timeStart = 0;

// capture the start time with a mouseover on the document body
		if (timeStart==0) {
			timeStart = start.getTime();

// bind a function to the window closing
$(window).bind("beforeunload", function(){
	alert("Leaving so soon? You were only here for "+timer()+" seconds."); 

// ask the user to confirm the window closing
window.onbeforeunload = function() {
	return "Leaving so soon? You were only here for "+timer()+" seconds."; 

// function to get the starting date
function timer() { 
	var end = new Date(); 
	var timeEnd = end.getTime();  

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