Custom Renderer

[PaulBGD]

Currently there's no way to use a custom renderer (see react renders for rendering to canvas, native, terminal, etc.)

[Rich-Harris]

There's nothing to stop an external package from implementing a custom renderer that follows the Svelte component spec (such as it is) – in fact I'm currently in the process of creating svelte-ssr which is basically exactly that. The question is the extent to which the core compiler is extensible enough to allow custom renderers to do their thing without reimplementing a lot of the tricky stuff.

With svelte-ssr I'm finding that it's just different enough that it deserves to be completely separate from the main compiler. I don't know how far that applies to those other examples. There are also cases where you might just want to hook into the compiler to add first class support for Redux/MobX/GraphQL/whatever.

For now I think it's early enough that we're better off thinking of those things as separate packages and learning which bits make sense to be plugins/hooks/whatever, and which truly belong in core.

[PaulBGD]

Oh definitely I think that these things should be separate packages. I should have been more clear, I was referring to the core compiler being extensible enough (without requiring copying large amounts of code) to allow custom renderers (which I don't think it currently is).

[Rich-Harris]

Will close this issue as it's a little vague; we should tackle specific cases as they arise