code: async function loadAsyncBatch () {
    const res = await io.load({
      hello: { text: 'assets/hello.txt' },
      color: { json: 'assets/color.json' },
      pex: { image: 'assets/pex.png' },
      data: { binary: 'assets/data.bin' }
    })
    state.asyncBatch.text = res.hello
    state.asyncBatch.json = res.color
    state.asyncBatch.image = res.pex
    state.asyncBatch.binary = res.data
  }
docs: async batch