The results of these two functions are different. Like includes(), the JavaScript indexOf() method determines whether a string contains another string. Check if String Contains Letters in JavaScript Using indexOf() The characters we are searching for are referred to as “word.” Here is an illustration of how to use the includes() method:- let example = "JavaScript String!" Ĭonsole.log("The word \"JavaScript\" is in the string.") Ĭonsole.log("The word \"JavaScript\" is not in the string.") The term “string” refers to the characters we will search through. The includes() method’s syntax is as follows:.
The contains() will return “false” if the given string does not include the characters you are searching for.
The method will return “true” if a specific set of characters are present in the string. The includes() method in JavaScript, which was added in ES6, check to see if a string contains the characters you supplied it. Check if String Contains Letters in JavaScript Using includes() These three ways will be covered in this tutorial’s discussion of how to determine whether a JavaScript string includes another string. There are three ways to determine whether a string of JavaScript comprises another character or series of characters:. To ensure that every username is appropriate for your game, you might want to check to see if it contains a word that is forbidden. Let’s take the example of creating an online game. In any computer language, determining if a string includes a substring is a common task. The most popular and intended way for determining whether a string contains a letter or group of characters is the includes() method.
Check if String Contains Letters in JavaScript | The includes() function, indexOf(), or a regular expression can all be used to determine whether a string of JavaScript contains a specific character or phrase.
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