In Angular, how to handle promise reject when using async/await

问题

In Angular, if I use promise, the code would be

let promise = this.$resource('www.example.com.au/request.json').get().$promise
promise.then(data => {
    //promise solved
}, () => {
   //promise rejected
})

when it comes to async/await the code becomes

async getData() {
    let data = await this.$resource('www.example.com.au/request.json').get().$promise
    this.localData = {...data}
}

but this is only for promise solved. if it is promise rejected, what should I do? thanks

回答1:

If the promise is rejected, an error will be thrown. Use try...catch:

async getData() {
  try {
    let data = await this.$resource('www.example.com.au/request.json').get().$promise
    this.localData = {...data};
  } catch(error) {
    // promise rejected
  }
}

来源：https://stackoverflow.com/questions/41028702/in-angular-how-to-handle-promise-reject-when-using-async-await