JavaScript

Fix: Uncaught ReferenceError: $ is not defined

This is a guide on how to fix a common error that occurs whenever the JQuery library hasn’t been loaded properly.

Calculating the mean / average in JavaScript.

This is a tutorial on how to calculate the mean / average of a JavaScript array.

JavaScript: Detect user activity / inactivity.

This is a short guide on how to detect user activity or inactivity using JavaScript.

JavaScript: Capitalize the first letter in a string.

This is a guide on how to capitalize the first letter in a JavaScript string.

JavaScript: Add a CSS class to an element.

This is a tutorial on how to add a CSS class to a HTML element using JavaScript.