convert an string to a array in javascript?

Question

I'm trying to convert a string to an array in javascript?

 var strng = "[a,b]"

Expected output:

 var arry = ["a","b"]

Answer 1

Work for all string like "[a,b]" or "[a,b,c,d]"

var strng = "[a,b]";
console.log(strng.replace(/\[|]/g, "").split(","));

Answer 2

Try this:

var strng = "[a,b]";
let arr = strng.slice(1,-1).split(",");
console.log(arr);