Mention "import type" in TypeScript FAQ (#5243)

* Mention "import type" in TypeScript FAQ

* Update site/content/faq/500-what-about-typescript-support.md

Co-authored-by: Christian Kaisermann <christian@kaisermann.me>
pull/5249/head
Ben McCann 4 years ago committed by GitHub
parent a62d736215
commit cf57050f49
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

@ -10,3 +10,11 @@ To declare the type of a reactive variable in a Svelte template, you should use
let x: number; let x: number;
$: x = count + 1; $: x = count + 1;
``` ```
To import a type or interface make sure to use [TypeScript's `type` modifier](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-8.html#type-only-imports-and-export):
```
import type { SomeInterface } from './SomeFile';
```
You must use the `type` modifier because `svelte-preprocess` doesn't know whether an import is a type or a value — it only transpiles one file at a time without knowledge of the other files and therefore can't safely erase imports which only contain types without this modifier present.

Loading…
Cancel
Save