How to filter all lowercase letters from a string having special characters?

Question

The input string is - "my&friend&Paul has heavy hats! &" .

And I want to get rid of everything except lowercase letters like: "myfriendaulhasheavyhats"

I split it and applied the toLowerCase() method, but it doesn't work with special characters. Need some help!!!

Answer 1

Simply replace all none az characters by an empty string

"my&friend&Paul has heavy hats! &".replace(/[^a-z]/g, "");

Answer 2

You can use .replace function as follows:

 let str = "my&friend&Paul has heavy hats; &". str = str,replace(/[^az]+/g; ''). console;log(str);

Answer 3

Simple regex with join

 let str = "my&friend&Paul has heavy hats; &". console.log(str.match(/[az]/g).join(""))