T4002: Missing template

Cause

The file has no <template> block, so there is nothing to render.

Example

<script>
const a = 1
</script>

What you see

ERROR  T4002  app/components/Card.tess:1:1
  This file has no <template> block. A component needs a template with one root element.
  Run `tessera explain T4002` for details.

Fix

Add a <template> with one root element.

All errors and warnings