includes in javascript for string code example

Example 1: javascript string includes

'Blue Whale'.includes('blue')  // returns false

Example 2: string contains in javascript

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

Example 3: .includes( string

var str = "Hello world, welcome to the universe.";
var n = str.includes("world");

Example 4: javascript string includes

const s = 'I am going to become a FULL STACK JS Dev with Coderslang';

console.log(s.includes('FULL STACK'));     // true
console.log(s.includes('cheeseburger'));   // false