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?

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 …

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. But how does it work exactly? In this article, I will walk you through a few code examples of the …

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

A fundamental operation in text processing is to check if a string contains a smaller piece of text, known as a substring. This is essential for searching, filtering, and validating data.

This JavaScript tutorial explains how to use the string method called includes () with syntax and examples. In JavaScript, includes () is a string method that determines whether a substring is found …

Learn how to use the JavaScript String includes () method to check if a string contains a specified substring. Explore syntax, examples, and practical applications.