array contains or includes javascript code example

Example 1: javascript array contains

var colors = ["red", "blue", "green"];
var hasRed = colors.includes("red"); //true
var hasYellow = colors.includes("yellow"); //false

Example 2: JavaScript Array Methods includes()

const list = [1, 2, 3, 4, 5, 5, 23, 21, 1231, 2434, 443546456, 17];
console.log(list.includes(4));
// --> true