Question

Iam looking for the user to enter 3 characters and they should be letters and not numbers and special characters

 if(txt1.match('[A-Za-z]{3}')){}

Is the above if condition is correct ?

Answer 1

You can use the i regex flag to make the matching case insensitive and simplify the regex. Also, without ^ and $, any string containing three consecutive letters will match. You need to add ^ and $ to match the beginning and end of the string respectively. Finally, if you don’t need to capture the text matched, you should use the test() method of the regular expression object to get a simple Boolean value:

if ( /^[a-z]{3}$/i.test(txt1) ) {}