Function writePackageJson

packages/vite/src/node/__tests__/config.spec.ts:1389–1397

(typeField: string | undefined)

      writtenConfig = fileName
    }
    const writePackageJson = (typeField: string | undefined) => {
      fs.writeFileSync(
        path.resolve(root, 'package.json'),
        JSON.stringify({
          name: '@vitejs/test-load-config-from-file',
          type: typeField,
        }),
      )
    }

    const canLoadConfig = async () => {
      const result = await loadConfigFromFile(