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winFocus is a lightweight jQuery plugin which allows to fire events when the browser window / tab gets or loses focus.

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Documentation

jQuery.winFocus

This cross-browser solution will better help you make callbacks whenever a Browser Window (Current Tab) loses or gains focus. It also seeks to tackle such issues as: duplicate calls, delaying trigger on page load, and Browser Window losing focus due to selection of another App (such as opening Calculator).


#Example Uses

Most Basic Use:

//	isVisible param in callback is TRUE or FALSE based on whether the Browser Window(Current Tab) has focus $.winFocus(function(event, isVisible) { 	console.log("Combo\t\t", isVisible); }); 

Delay Start:

//	passing `false` through will cause the callback to wait until first `blur` $.winFocus(function(event, isVisible) { 	console.log("Combo\t\t", isVisible); }, false); 

Using 2 Callbacks

When using 2 callbacks, the first becomes lost focus, whereas the second becomes gained focus

$.winFocus(function(event) { 	console.log("Blur\t\t", event); }, function(event) { 	console.log("Focus\t\t", event); }); 

Object Callbacks:

Callbacks blur, focus, and blurFocus can be passed in an object. All 3 can be passed at once, if you desire such, but blurFocus is the only one with a isVisible parameter.

$.winFocus({ 	//	will only fire when current tab loses focus 	blur: function(event) { 		console.log("Blur"); 	}, 	//	will only fire when current tab gains focus 	focus: function(event) { 		console.log("Focus"); 	}, 	//	will fire whenever current tab's focus changes 	blurFocus: function(event, isVisible) { 		console.log("Combo\t\t", isVisible); 	} }); 

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