Ciąg JavaScript zawiera
var string = "foo",
substring = "oo";
console.log(string.includes(substring));
Cautious Crane
var string = "foo",
substring = "oo";
console.log(string.includes(substring));const string = "foo";
const substring = "oo";
console.log(string.includes(substring));s = "Hello world";
console.log(s.includes("world"));var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
alert("Not again");
}
//use indexOf (it returns position of substring or -1 if not found)'Bandeira do Brasil'.includes('brasil'); // returns false
'Bandeira do Brasil'.includes('Brasil'); // returns trueconst pets = ['cat', 'dog', 'bat'];
console.log(pets.includes('cat'));
// output: true