how to slice a string nodejs code example

Example 1: js string slicing

const str = 'The quick brown fox jumps over the lazy dog.';

console.log(str.slice(31));
// expected output: "the lazy dog."

console.log(str.slice(4, 19));
// expected output: "quick brown fox"

Example 2: slice string javascript if has @

let email = '[email protected]'
let localPart = email.slice(0,email.indexOf('@'));