front-end/jsconfig.json

{
  "compilerOptions": {
    "moduleResolution": "bundler",
    "target": "ESNext",
    "module": "ESNext",
    /**

     * svelte-preprocess cannot figure out whether you have

     * a value or a type, so tell TypeScript to enforce using

     * `import type` instead of `import` for Types.

     */
    "verbatimModuleSyntax": true,
    "isolatedModules": true,
    "resolveJsonModule": true,
    /**

     * To have warnings / errors of the Svelte compiler at the

     * correct position, enable source maps by default.

     */
    "sourceMap": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    /**

     * Typecheck JS in `.svelte` and `.js` files by default.

     * Disable this if you'd like to use dynamic types.

     */
    "checkJs": true
  },
  /**

   * Use global.d.ts instead of compilerOptions.types

   * to avoid limiting type declarations.

   */
  "include": ["src/**/*.d.ts", "src/**/*.js", "src/**/*.svelte"]
}