The clear() method of the Storage interface clears all keys stored in a given Storage object.

None.

None (undefined).

The following function creates three data entries in local storage, and then deletes them by using clear().

function populateStorage() {
  localStorage.setItem("bgcolor", "red");
  localStorage.setItem("font", "Helvetica");
  localStorage.setItem("image", "miGato.png");

  localStorage.clear();
}

Using the Web Storage API