Empty component 'computed' throws error.

[taylorzane]

An empty component computed property causes svelte compiler to add an unnecessary recompute call without actually adding the recompute function.

Version: 1.13.6

Smallest failing example:

<script>
  export default {
    computed: {} 
  }
</script>

Error: recompute is not defined.

Seems like the error is going on here: src/generators/dom/index.js#L305-L309

In order to resolve this issue I see one of two options:

1. Check to see if computed is an empty object.
   • I think I'd prefer this more since I (personally) like to scaffold a component before adding in the computed properties.
2. Throw a warning at build time that an empty object for computed is invalid.

I'll be happy to submit a PR, I just wanted to figure out the best course of action.

[Conduitry]

I think allowing an empty computed object is reasonable. It looks like replacing the templateProperties.computed condition you mentioned with computations.length should fix this.

[taylorzane]

Great, I'll take care of that.