Both String#includes() and String#indexOf() are case sensitive . Neither function supports regular expressions. 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.
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.
Read moreHow do you use Lodash lowercase?
Lodash – lowerCase method
Read moreHow do you check if a string contains a particular substring in JavaScript?
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.
Read more