6/5/2023 0 Comments Javascript string contains![]() ![]() The method is case-sensitive and returns a boolean: a true value denotes. ![]() ‘amtrack’. The includes() method is a searching algorithm used to find a substring within a string or to find elements within an. You can check if a JavaScript string contains a substring using the includes() method. ![]() Read: How to remove a property from a Javascript Object You can also pass an optional second parameter to indicate where to start searching. This method returns an integer with the position of the substring, and if it does not find the substring, it returns -1. ‘AMTRACK’.includes(‘M’, 1) // true Using the indexOf () methodīefore the release of the official method includes(), another way to check if a string contains a substring was to use the method indexOf(). str2 'car' I want to check if str2 is in str. str 'car, bycicle, bus' and I have another string. You can optionally pass a second parameter to indicate where to start looking for the substring: I want to check is some text is in a string for instance i have a string. Read: How to delete values from an array in Javascript ‘HI WORLD’.toLowerCase().includes(‘world’) // true – javascript string lowercase Note that the method includes()is case sensitive, so if you want to search for an independent string if it is uppercase or lowercase, you can do the following: ‘Hi world’.includes(‘world’) // true – javascript includes string method The method includes()is the official way to check if a string is contained within another string. In JavaScript there are several ways to check whether a string contains a word or a substring. Checking if a string contains a word is a common task in any programming language. ![]()
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