Storage.clear()

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

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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