Remove Duplicates from Array in JavaScript

by Louis Lazaris / updated: May 21, 2020
Javascript

Add an Event Listener to Multiple Elements with JavaScript

by Louis Lazaris / updated: May 21, 2020
Javascript

List of All Countries (HTML Select, JavaScript, and JSON format)

by Louis Lazaris / updated: January 31, 2020
HTML, Javascript

Sticky Footer with CSS (Two Methods)

by Louis Lazaris / updated: January 10, 2020
CSS

Make a Div 100% Height of Browser Window (or Parent)

by Louis Lazaris / updated: May 21, 2020
CSS

Change Placeholder Styles for HTML Inputs with CSS

by Louis Lazaris / updated: November 30, 2019
CSS

CSS Drop Cap (Fancy Initial Letter)

by Louis Lazaris / updated: November 29, 2019

Submit Button with Pure CSS Loading Spinner

by Louis Lazaris / updated: November 26, 2019
CSS

Use JavaScript to Detect What Key the User Pressed

by Louis Lazaris / updated: December 2, 2019

Disable Right-Click (Context Menu) with JavaScript

by Louis Lazaris / updated: November 13, 2019
Javascript

Make a “Download This as HTML” Link

by Louis Lazaris / updated: November 13, 2019
HTML, Javascript

Smooth Animated Scrolling with JavaScript

by Louis Lazaris / updated: November 13, 2019
HTML, Javascript

A Textarea Element That Autoresizes

by Louis Lazaris / updated: November 13, 2019
HTML, Javascript

Highlighted Footnotes like Wikipedia with CSS

by Louis Lazaris / updated: November 13, 2019
CSS, HTML

Pure CSS Tooltips

by Louis Lazaris / updated: January 8, 2020
CSS, HTML