if contains nodejs code example

Example 1: string contains in javascript

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

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

Example 2: .includes( string

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

Example 3: typescript string contains

const test = 'Hello World';
if (test.includes('World')) { 
  // Found world
}