Run multiple async/await functions simultaneously

simultaneously-async-await.js

async () => {
  try {
    const [locations, categories] = await Promise.all([
     getLocations(),
     getCategories()
    ])
    this.setState({locations, categories, loading: false});
  } catch (err) {
    alert("Error: " + err.code + " " + err.message);
    this.setState({loading: false});
  }
}