Javascript

Difference between localStorage, sessionStorage and cookies

localStorage, sessionStorage and cookies are all client storage solutions which store data as key/value pairs in the browser. localStorage and sessionStorage both extend Storage. There is no difference between them except for the intended “non-persistence” of sessionStorage. sessionStorage maintains a separate storage area for each given origin that’s available for the duration of the page …

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Inheritance in Javascript

Inheritance is a concept which says you can create a class from another class if you would like to use its properties. A parent cantalk and caneat, so can the child because child “is a” subclass of Parent. While most programming languages have the concept of classes, in javascript its all about objects inheriting from other …

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Different ways of setting a value to a Javascript object

Different ways of setting a value to a Javascript object //create an object var myVar = {}; //1. set value using dot myVar.key = “myvalue”; //2. set value using square brackets myVar[“key2”] = “myValue2″ //3. set value using defineProperty Object.defineProperty(myVar,”key3”,{ value : “myValue3” }); Setting values using the dot syntax or square brackets is pretty easy …

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Important Javascript Code snippets

To Generate UUID function generateUUID() { var d = new Date().getTime(); var uuid = ‘xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx’.replace(/[xy]/g, function(c) { var r = (d + Math.random() * 16) % 16 | 0; d = Math.floor(d / 16); return (c == ‘x’ ? r : (r & 0x3 | 0x8)).toString(16); }); return uuid; } Sample output : 48808c28-24e0-4081-be13-2c27948bfa27 Extract …

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