if text includes javascript code example

Example 1: if string javascript

if (typeof myVar === 'string') { /* code */ };

Example 2: .includes( string

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

Example 3: includes in javascript

var colors = ['yellow', 'red', 'pink'];
var string = 'yellow and red are pretty cool';

// outputs false
console.log(colors.include('blue');
// outputs true
console.log(string.includes('yellow');