str replace for javascript code example

Example 1: javascript replace string

var str = "JavaScript replace method test";
var res = str.replace("test", "success");  
//res = Javscript replace method success

Example 2: replace javascript

let randomtext = "Random text yo!"
let textRegex = /yo!/;
randomtext.replace(textRegex, "is here.");
console.log(randomtext.replace(textRegex, "is here."));
// Returns Random text is here.