does .replace modify the string js code example

Example 1: how to use the replace method in javascript

let string = 'soandso, my name is soandso';

let replaced = string.replace(/soandso/gi, 'Dylan');

console.log(replaced); //Dylan, my name is Dylan

Example 2: replace() in javascript

replace(regexp, newSubstr)
replace(regexp, replacerFunction)

replace(substr, newSubstr)
replace(substr, replacerFunction)