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

Jul 10, 2025 · Thrown if searchString is a regex. This method lets you determine whether or not a string includes another string. The includes() method is case sensitive. For example, the following …

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 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.

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.

Nov 5, 2021 · In JavaScript you can use the .includes() method to see if one string is found in another. Here is the basic syntax for the .includes() method. If the search-string is found then it will return true. …

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

As of February 2026, ECMAScript 2026 (ES2026) is the current or imminent standard (finalized mid-2026). The core String.prototype methods for substring detection — includes(), indexOf(), search(), …

Sep 22, 2025 · Use the includes () method to efficiently check if a string contains a specific substring with modern ES6 syntax.

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 …