add function

function add() {
  let request = db.transaction(["name"], "readwrite")
  .objectStore("name")
  .add({ name: "User created just for the test" });

  request.onsuccess = function(event) {
    self.postMessage('Successfully added user in db');
  };

  request.onerror = function(event) {
    self.postMessage('something went wrong here');
  }
}