Render Middleware

[thomashuston]

Right now, I've only baked in support for very straightforward ReactDOM renderToStaticMarkup in the react-percy-server-render package. It will automatically inject any CSS files into the head, but that's about it.

We may want to expose a way to modify the generated HTML before sending it to Percy, though. For example, when using styled-components for styling, ReactDOM will render in references to class names, but the CSS styles themselves need to be flushed and injected into the head. Middleware might be a nice way to make this possible without cluttering up the core react-percy code too much with edge cases.

[thomashuston]

This issue is no longer relevant now that we client side render snapshots. Libraries like styled components should work just fine out of the box now.