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T3011: Declared part is not used in the template ​

Cause ​

A part is declared in the contract, but no element in the template has that class, so the contract promises something the component does not do.

Example ​

xml
<contract>
{ "name": "Card", "role": "group", "parts": ["root", "icon"] }
</contract>
<template><div class="root"></div></template>

What you see ​

text
ERROR  T3011  app/components/Card.tess:2:54
  Part "icon" is declared in the contract, but no element in the template has class="icon".
  Add class="icon" to an element, or remove "icon" from parts.
  Run `tessera explain T3011` for details.

Fix ​

Add an element with that class, or remove the part.

All errors and warnings