# WunderGraph + Svelte Query + TS + Vite

This template should help get you started developing with Svelte Query and TypeScript in Vite using WunderGraph.

## Recommended IDE Setup

[VS Code](https://code.visualstudio.com/) + [Svelte](https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode).

## Using WunderGraph

```ts
// In lib/wundergraph
import { createSvelteClient } from '@wundergraph/svelte-query';
import { createClient } from '../../.wundergraph/generated/client';
import type { Operations } from '../../.wundergraph/generated/client';

const client = createClient();

const { createFileUpload, createMutation, createQuery, createSubscription, getAuth, getUser, queryKey } =
  createSvelteClient<Operations>(client);

export { createFileUpload, createMutation, createQuery, createSubscription, getAuth, getUser, queryKey };
```

```svelte
<script lang="ts">
    import { createQuery } from "../lib/wundergraph";

    const dragonsQuery = createQuery({
        operationName: "Dragons",
    });
</script>

<div class="results">
    {#if $dragonsQuery.isLoading}
        <p>Loading...</p>
    {:else if $dragonsQuery.error}
        <pre>Error: {JSON.stringify($dragonsQuery.error, null, 2)}</pre>
    {:else}
        <pre>{JSON.stringify($dragonsQuery.data, null, 2)}</pre>
    {/if}
</div>
```

## Need an official Svelte framework?

Check out [SvelteKit](https://github.com/sveltejs/kit#readme), which is also powered by Vite. Deploy anywhere with its serverless-first approach and adapt to various platforms, with out of the box support for TypeScript, SCSS, and Less, and easily-added support for mdsvex, GraphQL, PostCSS, Tailwind CSS, and more.

## Technical considerations

**Why use this over SvelteKit?**

- It brings its own routing solution which might not be preferable for some users.
- It is first and foremost a framework that just happens to use Vite under the hood, not a Vite app.

This template contains as little as possible to get started with Vite + TypeScript + Svelte, while taking into account the developer experience with regards to HMR and intellisense. It demonstrates capabilities on par with the other `create-vite` templates and is a good starting point for beginners dipping their toes into a Vite + Svelte project.

Should you later need the extended capabilities and extensibility provided by SvelteKit, the template has been structured similarly to SvelteKit so that it is easy to migrate.

**Why `global.d.ts` instead of `compilerOptions.types` inside `jsconfig.json` or `tsconfig.json`?**

Setting `compilerOptions.types` shuts out all other types not explicitly listed in the configuration. Using triple-slash references keeps the default TypeScript setting of accepting type information from the entire workspace, while also adding `svelte` and `vite/client` type information.

**Why include `.vscode/extensions.json`?**

Other templates indirectly recommend extensions via the README, but this file allows VS Code to prompt the user to install the recommended extension upon opening the project.

**Why enable `allowJs` in the TS template?**

While `allowJs: false` would indeed prevent the use of `.js` files in the project, it does not prevent the use of JavaScript syntax in `.svelte` files. In addition, it would force `checkJs: false`, bringing the worst of both worlds: not being able to guarantee the entire codebase is TypeScript, and also having worse typechecking for the existing JavaScript. In addition, there are valid use cases in which a mixed codebase may be relevant.

**Why is HMR not preserving my local component state?**

HMR state preservation comes with a number of gotchas! It has been disabled by default in both `svelte-hmr` and `@sveltejs/vite-plugin-svelte` due to its often surprising behavior. You can read the details [here](https://github.com/rixo/svelte-hmr#svelte-hmr).

If you have state that's important to retain within a component, consider creating an external store which would not be replaced by HMR.

```ts
// store.ts
// An extremely simple external store
import { writable } from 'svelte/store';
export default writable(0);
```

## Deploy to WunderGraph Cloud

[![Deploy to WunderGraph](https://wundergraph.com/button)](https://cloud.wundergraph.com/new/clone?templateName=vite-svelte)

You can deploy the `dist` folder to any static host provider (vercel, netlify, surge, now, etc.)
