Window: storage event

The storage event of the Window interface fires when a storage area (localStorage) has been modified in the context of another document.

Log the sampleList item to the console when the storage event fires:

window.addEventListener('storage', () => {
  // When local storage changes, dump the list to
  // the console.
  console.log(JSON.parse(window.localStorage.getItem('sampleList')));
});

The same action can be achieved using the onstorage event handler property:

window.onstorage = () => {
  // When local storage changes, dump the list to
  // the console.
  console.log(JSON.parse(window.localStorage.getItem('sampleList')));
};

• Web Storage API
• Using the Web Storage API