js contains or includes code example

Example 1: javascript includes

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

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

Example 2: string.contains javascript

var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
	alert("Not again");
}

Example 3: javascript string contains

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

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