contains function javascript code example

Example 1: javascript string contains

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

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

Example 2: javascript string contains function

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

Example 3: js string contains

'Bandeira do Brasil'.includes('brasil'); // retorna false

Example 4: js string contains

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

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

Example 5: javascript includes

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

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