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How-to articles, tricks, and solutions about JAVASCRIPT

Colors in JavaScript Console

The console.log() method outputs a message to the web console. Read the tutorial and learn the simplest method of putting a single or multiple styles to it.

css javascript color style string javascript object function

Form Validation Using JavaScript

Incorrect information leads to bad user interactions. So as to prevent this problem, read and learn how to validate forms with the help of JavaScript!

html javascript form validation

How and When to Write Comments in Javascript

There are 2 types of JavaScript comments: single-line and multi-line. See when to use them with examples, and also use comments to prevent execution when testing alternative code.

javascript comment rule

How Does the Access-Control-Allow-Origin Header Work

Read this tutorial and learn about how the Access-Control-Allow-Origin response header works. Also, read about CORS, the origin, and non-simple requests.

javascript json link http

How Get the Current Year in JavaScript

Read this tutorial and learn about the simplest and fastest method of getting the current year a four-digit number using the Date object in JavaScript.

javascript date javascript objects

How JavaScript Closures Work

In the following snippet, we are going to represent how JavaScript closures work. The easiest way of learning how to use them is investigating examples.

javascript closures closures in Java

How the Keyword “this” Works

In this tutorial, you can find information about the usage of the keyword “this” in JavaScript. Here, it works differently compared with other languages.

javascript JavaScript this javascript object this keyword javascript

How to Access the Correct “this” Inside a Callback

In the following tutorial, you can find the answer to one of the most common issues in JavaScript: how to access the correct “this” inside a callback.

javascript JavaScript this callback javascript

How to Add a Class to a Given Element

Read the tutorial and learn the two suggested methods of creating a JavaScript function that will add a class to the <div> element and solve your problem.

javascript element function

How to Add a Text on the HTML5 <canvas> Element

In this tutorial, you’ll find out how to add text on the HTML5 <canvas> element. For that, you need Javascript. Use the fillText() and strokeText() methods.

html javascript text HTML5 canvas