Answers for "strig contains javascriipt"

javascript string contains

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

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

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