Description The includes() method returns true if a string contains a specified string. Otherwise it returns false. The includes() method is case sensitive.

Nov 24, 2009 · Usually I would expect a String.contains () method, but there doesn't seem to be one. What is a reasonable way to check for this?

Jul 10, 2025 · The includes () method of String values performs a case-sensitive search to determine whether a given string may be found within this string, returning true or false as appropriate.

Oct 7, 2022 · The JavaScript includes() method was introduced with ES6, and it is the most common and modern way of checking if a string contains a specific character or a series of characters.

Dec 5, 2025 · Learn how to check if a string contains a specific value in JavaScript using includes (), indexOf (), and regex. Simple examples for beginners.

Feb 19, 2023 · This practical article walks you through 4 different ways to check whether a given string contains a substring or not. Without any further ado (like talking about the history of Javascript or …

In this tutorial, you will learn how to use the JavaScript String includes () method to check if a string contains a substring.

Feb 13, 2026 · Learn how to check if a string contains a substring in JavaScript using includes (), indexOf (), regex, and case-insensitive methods.

Jul 23, 2025 · The includes () method is the most simple and modern way to check if a string contains a specific substring. It returns true if the substring is found within the string, and false otherwise.

Jan 16, 2026 · The includes () method is used to check whether a string contains a specific value. It returns a boolean result based on whether the text is found or not. Returns true if the string contains …