how to lowercase string 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: javascript lowercase string

var str = "ExaMple";
var res = str.toLowerCase();
output res -> "example"

Example 3: js tolowercase use

string.toLowerCase(2)

Example 4: tolowercase js

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