Does this.setState return promise in react

Question

I made my componentWillMount() async. Now I can using await with the setState.

Here is the sample code:

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Answer 1

You can promisify this.setState so that you can use the React API as a promise. This is how I got it to work:

class LyricsGrid extends Component {

  setAsyncState = (newState) =>
    new Promise((resolve) => this.setState(newState, resolve));

Later, I call this.setAsyncState using the standard Promise API:

this.setAsyncState({ lyricsCorpus, matrix, count })
  .then(foo1)
  .then(foo2)
  .catch(err => console.error(err))