Share sessionStorage.js

// Removed IE support in this demo for the sake of simplicity
(function() {
	if (!sessionStorage.length) {
		// Ask other tabs for session storage
		localStorage.setItem('getSessionStorage', Date.now());
	};
	// Core
	window.addEventListener('storage', function(event) {
		if (event.key == 'getSessionStorage') {
			// Some tab asked for the sessionStorage -> send it
			localStorage.setItem('sessionStorage', JSON.stringify(sessionStorage));
			localStorage.removeItem('sessionStorage');
		} else if (event.key == 'sessionStorage' && !sessionStorage.length) {
			// sessionStorage is empty -> fill it
			var data = JSON.parse(event.newValue),
					value;
			for (key in data) {
				sessionStorage.setItem(key, data[key]);
			}
		}
	});
})();