javascript if a string contains code example

Example 1: javascript string contains

var string = "foo",
    substring = "oo";

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

Example 2: javascript includes

const pets = ['cat', 'dog', 'bat'];

console.log(pets.includes('cat'));
// output: true

Example 3: javascript string contains

var string = "foo",
var substring = "oo";

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