swannodette

key is pretty much crucial for state perservation in React. As of React 0.13 it can't do the following things:

• Clone state

<Comp key={1} /><Comp key={1} />

• Preserve component state across different parents:

jimmywarting

Exposed headers

Service	SSL	status	Response Type	Allowed methods	Allowed headers

optimalisatie

// Performance tests such as Google Lighthouse often complain about below the fold images while lazy loading 
// techniques may introduce a flash effect for images on bigger screens
// This snippet shows a solution to instantly display images as if loaded using src="" while maintaining 
// the lazy loading benefit on smaller screens.

// Tip: a second and potentially better technique is to rewrite lazy loaded images to regular src="" images in a Service Worker.

// this snippet depends on in-view (5kb)
// @link https://github.com/camwiegert/in-view/