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How to detect idle time in JavaScript elegantly?

Is it possible to detect " idle " time in JavaScript? My primary use case probably would be to pre-fetch or preload content. ...
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How can I know which radio button is selected via jQuery?

... alert($('input[name=radioName]:checked', '#myForm').val()); }); <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <form id="myForm"> <input type="radio" name="radioName" value="1" /> 1 <br /> <input type="radio" na...
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Declaring abstract method in TypeScript

... abstract makeSound(input : string) : string; move(meters) { alert(this.name + " moved " + meters + "m."); } } class Snake extends Animal { constructor(name: string) { super(name); } makeSound(input : string) : string { return "sssss"+input; } move() { ...
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How to send multiple data fields via Ajax? [closed]

...here: http://api.jquery.com/jQuery.ajax/ So if that doesn't work, I would alert those variables to make sure they have values. share | improve this answer | follow ...
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Python's json module, converts int dictionary keys to strings

...ect properties are converted to String. var a= {1: 'a'}; for (k in a) alert(typeof k); // 'string' This can lead to some curious-seeming behaviours: a[999999999999999999999]= 'a'; // this even works on Array alert(a[1000000000000000000000]); // 'a' alert(a['999999999999999999999']); // fail ...
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Prevent any form of page refresh using jQuery/Javascript

... #1 can be implemented via window.onbeforeunload. For example: <script type="text/javascript"> window.onbeforeunload = function() { return "Dude, are you sure you want to leave? Think of the kittens!"; } </script> The user will be prompted with the message, and ...
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Difference between val() and text()

...me="vehicle" value="Bike" id="chk_byk" class="ss">bike<br> <script type="text/javascript"> $(document).ready(function () { $("#btn_submit").click(function () { alert($("#chk_byk").val()); }); }); </script> where ...
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AngularJS - pass function to directive

...st color1="color1" update-fn="updateFn"></test> </div> <script> angular.module('dr', []) .controller("testCtrl", function($scope) { $scope.updateFn = function(msg) { alert(msg); } }) .directive('test', function() { return { scope:...
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Object.watch() for all browsers?

... developer.mozilla.org/en/JavaScript/Reference/Global_Objects/… – Eli Grey Dec 27 '11 at 8:00 ...
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Detecting value change of input[type=text] in jQuery

...tener like this: $("#myTextBox").on("change paste keyup", function() { alert($(this).val()); }); share | improve this answer | follow | ...