To check for case insensitive values, use regular expression in JavaScript. Following is the code −
Example
var allNames = ['john','John','JOHN']; var makeRegularExpression = new RegExp(allNames.join( "|" ), "i"); var hasValue = makeRegularExpression.test("JOHN"); console.log("Is Present="+hasValue);
To run the above program, you need to use the following command −
node fileName.js.
Here, my file name is demo130.js.
Output
This will produce the following output −
PS C:\Users\Amit\JavaScript-code> node demo130.js Is Present=true