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How to use for and while loops in JavaScript

Learn how to use 'for' and 'while' loops to make light work of repetitive tasks.

Traversing the DOM

Learn the most important methods to traverse the DOM with ease.

What’s the difference between null and undefined data types?

Discover the subtle differences between these data types.

Array basics and must-know array operations

Learn how to create, evaluate and manipulate arrays.

const, let or var: Which should I use?

Learn the differences between 'const', 'let' and 'var' and when to use them.

Create a live time display from different world cities

Create a ticking clock display for world cities using HTML, CSS and vanilla JS

Functions in JavaScript

How to write and call functions in Javascript.

Accessing the DOM with Javascript

Learn how to effectively access the DOM using the .getElement and query selector methods.

Editing a HTML class attribute list using JavaScript

How to edit the contents of a HTML class attribute list using JavaScript.