string .includes javascript code example

Example 1: check if word is in string javascript

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

Example 2: js string contais

const string = "foo";
const substring = "oo";

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

Example 3: js string contains

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

console.log(string.indexOf(substring) !== -1);

Example 4: javascript string includes

const s = 'I am going to become a FULL STACK JS Dev with Coderslang';

console.log(s.includes('FULL STACK'));     // true
console.log(s.includes('cheeseburger'));   // false

Example 5: javascript string contains

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

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