The downside to regex is that it can be slower to run depending on what rules you use. This is because “JavaScript” is in our “example” string.

If the specified string does not contain the characters for which you are looking, includes() will return “false.”

If the string contains certain characters, the method will return “true.” The JavaScript includes() method, introduced in ES6, determines whether a string contains the characters you have passed into the method. In this tutorial, we’re going to discuss methods you can use to check if a JavaScript string contains another string using these three approaches. There are three methods for checking if a JavaScript string contains another character or sequence of characters:

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Javascript includes string