Slicing string in JavaScript

const str = 'Mozilla';

console.log(str.substring(1, 3));
// expected output: "oz"

console.log(str.substring(2));
// expected output: "zilla"

 

Ref. https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/String/substring

String.prototype.substring() - JavaScript | MDN