Javascript – Webbjocke

Web encryption and hashing in javascript with the crypto api

webbjocke — Wed, 28 Feb 2018 17:13:44 +0000

A while ago it was announced that a crypto api will be released for javascript. Meaning it will be possible to do real encrypting and decrypting, and generating hashes directly in the web browser. Now it’s actually possible! It should be noted though that even if the api is a candidate recommendation, the browser support..

How to better check data types in javascript

webbjocke — Sat, 20 Aug 2016 19:31:20 +0000

To check what data type something has in javascript is not always the easiest. The language itself provides an operator called typeof for that which works in a straightforward way. Typeof returns a string of what a values data type is, so for an object “object" is returned and for a string “string". However javascripts..

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ECMAScript 5's array metods

webbjocke — Fri, 12 Aug 2016 18:13:21 +0000

It was a great many years ago ECMAScript 5 came out to javascript now, and brought not only lots of exciting news, but also a great deal of new array methods. Methods that does everything from looping through, changing, filtering and extracting values from them. Below is a list over all the array methods that..

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RequestAnimationFrame for better animations in javascript

webbjocke — Sun, 24 Apr 2016 20:12:15 +0000

RequestAnimationFrame is a function in javascript which is used to create animations directly in the browser. Javascript has been used for doing animations for a long time, and it's pretty awesome what things really can be done with the language. For simpler stuff though as animated hover effects when someone hovers their mouse cursor over..

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Localstorage instead of cookies in javascript

webbjocke — Sat, 26 Dec 2015 14:00:22 +0000

When this article is written localstorage in javascript isn't anything new. It's been available since html5 rolled out on the web, and is simply a way of storing user data between page views. Cookies in javascript As most people know, nothing in javascript is saved when a user reloads a page or navigates to another...

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How switch works in javascript

webbjocke — Fri, 28 Aug 2015 17:18:04 +0000

Switch is a statement in javascript that's used to control the data flow in programs. With other words to be able to decide what should happen from different cases or actions. Basically the same way one does with if and else, which most people probably are familiar with by now. They work in similar ways..

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Null and undefined in javascript

webbjocke — Wed, 12 Aug 2015 09:12:34 +0000

Null and undefined are two data types in javascript that are a bit special and different from each other. Most programming languages only have null, but in javascript there's also undefined which is similar to null, but not exactly the same. They both are a bit similar to the boolean false. All three are falsy..

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Dates and time in javascript with date

webbjocke — Sun, 05 Jul 2015 19:37:28 +0000

Introduction to time and date It's probably not a surprise that you can work with dates and times in javascript. There's an object built in for that which is used all the time in all sorts of projects. Often to be able to set a date for when something has happened or will happen. For..

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Arrays in javascript and their methods

webbjocke — Sat, 04 Jul 2015 23:52:38 +0000

An array in javascript is something that could be described as a list of values. Until now we've only talked about single values like strings and numbers that can be stored into variables. But sometimes you want to be able to store multiple values in the same place, like in a variable. For example if..

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Loops in javascript

webbjocke — Thu, 02 Jul 2015 20:29:57 +0000

Loops in javascript are something very useful and which are used all the time. They're not specific just for javascript, rather they can be found in almost all programming languages in the world. Loops are one of the most fundamental building blocks in programming, and some argument that all you really need to create a..

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