Svelte Configuration For Snowpack without Jest

The official svelte configuration (app-scripts-svelte) includes jest by default. Unfortunately, jest is using packages which have been depricated. This is the same config, but modified to remove the need for jest.

Note on using Typescript

The easiest way is probably to use the snowpack-template-svelte-ts git repo, which includes this package, and does the below configuration.

npx degit vaishnavsm/snowpack-template-svelte-ts svelte-ts-app

Generally, in order to use typescript properly with Svelte,

1. Install the typescript and svelte-preprocess packages as dev dependencies

    yarn add --dev svelte-preprocess typescript
    npm i -D svelte-preprocess typescript
   

2. Add a file called svelte.config.js and export a preprocess property as an instance of svelte-preprocess.

    const preprocess = require('svelte-preprocess')
   
    module.exports = {
      preprocess: preprocess()
    }