Javascript 在Angular中,如何在使用async/Wait时处理承诺拒绝
在Angular中,如果我使用promise,代码将是Javascript 在Angular中,如何在使用async/Wait时处理承诺拒绝,javascript,angularjs,async-await,ecmascript-2017,Javascript,Angularjs,Async Await,Ecmascript 2017,在Angular中,如果我使用promise,代码将是 let promise = this.$resource('www.example.com.au/request.json').get().$promise promise.then(data => { //promise solved }, () => { //promise rejected }) 当涉及异步/等待时 代码变为 async getData() { let data = await th
let promise = this.$resource('www.example.com.au/request.json').get().$promise
promise.then(data => {
//promise solved
}, () => {
//promise rejected
})
当涉及异步/等待时
代码变为
async getData() {
let data = await this.$resource('www.example.com.au/request.json').get().$promise
this.localData = {...data}
}
但这只是为了实现承诺。如果承诺被拒绝,我该怎么办?谢谢如果承诺被拒绝,将抛出错误。使用
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
}
}
如果承诺被拒绝,将抛出一个错误。使用
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
}
}