string lower in javascript code example

Example 1: javascript lowercase string

var str = "My Big Boy!"
var res = str.toLowerCase(); //res is "my big boy!"

Example 2: tolowercase javascript

var str = "Hello World!";
var res = str.toLowerCase();

Example 3: tolowercase js

const sentence = 'The quick brown fox jumps over the lazy dog.';
console.log(sentence.toLowerCase());