Contains Sub String in a String JavaScript

Contains Sub String in a String JavaScript

var charString = "Hyderabad is a beautiful city";

        var regExp = new RegExp("beauti");

        if (regExp.test(charString.toString()))

        {

            alert('True')

        }

              

        var regExp = new RegExp("beda");

        if (regExp.test(charString.toString())) {

            alert('True city')

        }

        else {

            alert('false');

        }