use promise in react js code example

Example: react promises

componentWillMount() {
 var promise = new Promise( (resolve, reject) => {

  let name = 'Paul'

  if (name === 'Paul') {
   resolve("Promise resolved successfully");
  }
  else {
   reject(Error("Promise rejected"));
  }
 });

 let obj = {newName: ''};

 promise.then( result => {
  this.setState({name: result});
 }, function(error) {
  this.setState({name: error});
 });
}