Convert a String to Lowercase and Uppercase with JavaScript

01/16/2022
Contents
In this article, you will learn how to convert a string to lowercase and uppercase with JavaScript.
Convert a string to lowercase
Use the toLowerCase() method to convert the string to lowercase.
Below is a sample.
let str = "Lorem ipsum dolor sit amet";
console.log(str.toLowerCase());
//result
//"lorem ipsum dolor sit amet"
Convert a string to uppercase
Use the toUpperCase() method to convert a string to uppercase.
Below is a sample.
let str = "Lorem ipsum dolor sit amet";
console.log(str.toUpperCase());
//result
//"LOREM IPSUM DOLOR SIT AMET"