The includes() method returns true if a string contains a specified string. Otherwise it returns false . The includes() method is case sensitive.
Read moreHow do you test a substring case insensitive?
To do case insensitive search, you can use regular expressions and the String#match() function , or you can convert both the string and substring to lower case using the String#toLowerCase() function.16 May 2019
Read moreHow do you make a case insensitive in JavaScript?
The most basic way to do case insensitive string comparison in JavaScript is using either the toLowerCase() or toUpperCase() method to make sure both strings are either all lowercase or all uppercase .
Read moreIs includes JavaScript case-sensitive?
Note: The includes() method is case sensitive i.e, it will treat the Uppercase characters and Lowercase characters differently.
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