Answers for "how to use contains in javascript"

check for substring javascript

const string = "javascript";
const substring = "script";

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

javascript string contains

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

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

string contains in javascript

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

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

javascript string contains function

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

javascript string contains

var email = "[email protected]";
if(email.includes("@")){
  console.log("Email is valid");
}
else{
  console.log("Email is not valid");
}
// includes return boolean, if your string found => true else => false

js string contains

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