Method transform

packages/vite/src/node/server/pluginContainer.ts:1294–1304

(
    code: string,
    id: string,
    options?: {
      ssr?: boolean
      environment?: Environment
      inMap?: SourceDescription['map']
    },
  )

  }

  async transform(
    code: string,
    id: string,
    options?: {
      ssr?: boolean
      environment?: Environment
      inMap?: SourceDescription['map']
    },
  ): Promise<{ code: string; map: SourceMap | { mappings: '' } | null }> {
    return this._getPluginContainer(options).transform(code, id, options)
  }

  async close(): Promise<void> {
    // noop, close will be called for each environment