This is the demo page that shows all of gaia web components.
Enable web component support
To view the result on desktop, open your Firefox Browser and enable dom.webcomponents.enabled preference in about:config.
To view the result on FirefoxOS device, connect your device and open WebIDE in desktop, choose preference table from option menu to enable dom.webcomponents.enabled preference on device.
Track components status
You can check Is Gaia Components Ready page to track current gaia web components status.