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 · 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 …

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 …

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.

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

Checking for a substring is a simple but essential task in JavaScript. The key takeaways are: The .includes() method is the modern, recommended best practice. It is clear, readable, and …

Sep 12, 2025 · JavaScript string includes () method checks whether one string may be found within another string, returning true or false as appropriate.

Having taught JavaScript for over 15 years, I‘ve seen my students struggle with string manipulation more often than not. However, with the advent of modern methods like …

Jul 23, 2025 · Here are the different methods to check whether a string contains a substring in JavaScript. 1. Using includes () Method. The includes () method is the most simple and …