contains function js code example

Example 1: javascript string contains function

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

Example 2: javascript string includes

'Blue Whale'.includes('blue')  // returns false

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);