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ts-svelte-component-bug's Introduction

ts-svelte-component-bug

Repo that reproduces bug with TypeScript but for <svelte:component/>. The component should accept unioned typed props, but instead accepts intersected types.

Created for this issue: sveltejs/language-tools#1669

Steps to reproduce

  1. Create a component with TypeScript enabled, that exports a prop.
  2. Create a second component with the same prop name but different type.
  3. Pass the props and types to a <svelte:component/> in an {#each} block.

Expected

The <svelte:component/> accepts prop of type a | b

Actual

Error is raised because <svelte:component/> requires prop of type a & b

Type 'a | b' is not assignable to type 'a & b'.

Build succeeds, but frustrating because error cannot be ignored or dismissed because it's generated within the HTML component body.

How to run this repo

npm ci
npm run dev

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