JavaScript typeof - W3Schools
The typeof operator returns the data type of a JavaScript variable. In JavaScript, a primitive value is a single value with no properties or methods. JavaScript has 7 primitive data types: The typeof …
typeof - JavaScript | MDN
Jan 8, 2026 · The typeof operator returns a string indicating the type of the operand's value. An expression representing the object or primitive whose type is to be returned. The following table …
How to check the type of a variable or object in JavaScript
Jul 23, 2025 · The typeof operator in JavaScript allows you to determine the type of value or type of value that a variable contains . There is just one operand for the typeof operator (a unary operator), …
JavaScript Type Checking – How to Check Type in JS with typeof ()
Dec 9, 2022 · In this article, you will learn how to use the typeof operator, instances when you should not use typeof, and the best way to check type in JavaScript for such instances. In JavaScript, data …
JavaScript typeof
In this tutorial, you'll learn how to use the JavaScript typeof operator that returns a string representing the type of a value.
How to Use typeof in JavaScript | Beginner-Friendly Tutorial to Check ...
In this beginner-friendly tutorial, you’ll learn how to use the typeof operator in JavaScript to accurately identify the type of any variable or value.
How to Check Data Types in JavaScript Using Typeof
Apr 11, 2025 · The typeof operator in JavaScript checks and returns a string of the data type of a variable. It can return up to nine possible data types for JavaScript variables, including string, …
Understanding JavaScript's typeof Operator and Type Checking
Jun 24, 2025 · This article explores the typeof operator in detail—how it works, what it can and cannot do, and how to combine it with instanceof, Array.isArray(), and . constructor for more reliable type …
JavaScript - typeof Operator - Online Tutorials Library
In JavaScript, number type represents numeric values. JavaScript uses a floating-point representation for all numbers. The JavaScript typeof operator returns 'number' for all types of numbers such as …
JavaScript Typeof: Checking Variable and Value Types
Aug 25, 2024 · Explore how to use the JavaScript `typeof` operator to check variable and value types in your code, enhancing your programming efficiency and debugging skills.