W3Schools maintains a complete JavaScript reference, including all HTML and browser objects. The reference contains examples for all properties, methods and events, and is continuously updated …

JavaScript (JS) [a] is a programming language and core technology of the Web, alongside HTML and CSS. It was created by Brendan Eich in 1995. [6] As of 2025, the overwhelming majority of websites …

Jul 8, 2025 · Equality comparisons and sameness JavaScript provides three different value-comparison operations: === — strict equality (triple equals) == — loose equality (double equals) Object.is() …

Jul 8, 2025 · Functions are one of the fundamental building blocks in JavaScript. A function in JavaScript is similar to a procedure—a set of statements that performs a task or calculates a value, but for a …

W3Schools offers free online tutorials and references on web development languages such as HTML, CSS, JavaScript, PHP, SQL, and JQuery.

Jun 13, 2018 · I have a few questions about setting a variable equal to another variable in JavaScript. Let's say we create an object, a and set b = a.

Jul 15, 2025 · In JavaScript, we can access an array element as in other programming languages like C, C++, Java, etc. Also, there is a method called splice () in JavaScript, by which an array can be …

Feb 3, 2014 · I have two JS functions. One calls the other. Within the calling function, I'd like to call the other, wait for that function to finish, then continue on. So, for example/pseudo code: function

A JavaScript Set is a collection of unique values. Each value can only occur once in a Set. The values can be of any type, primitive values or objects.

Dec 16, 2025 · Using CSS custom properties (variables) Custom properties (sometimes referred to as CSS variables or cascading variables) are entities defined by CSS authors that represent specific …