check if string includes code example

Example 1: check if string contains javascript

var str = "Hello world, welcome to the universe.";

var n = str.includes("world");

Example 2: check if word is in string javascript

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

Example 3: javascript string contains

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

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

Example 4: javascript string contains function

s = "Hello world";
console.log(s.includes("world"));