Enable deferral of slow async components.

Any async component that takes longer than the given timeout will be deferred, and replaced with a placeholder in the stream. The component will eventually be rendered at the end of the stream in a block of Javascript that replaces the placeholder in the browser.

Setting this to falsy will disable deferral.

Provide a custom deferred placeholder rendering function.

Provide a custom function to render the substitution of a deferred stream.

Enable a delay during streaming.

This allows you to see the actual effect of streaming whilst developing locally.

Allow custom handling of tags.

Content can be injected before/after a opening or closing tag. Useful for injecting scripts to support custom elements.