if a string contains a substring javascript code example

Example 1: check for substring javascript

const string = "javascript";
const substring = "script";

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

Example 2: javascript string includes

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

Example 3: How to check whether a string contains a substring in JavaScript?

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