最佳答案
如何拒绝由async
/await
函数返回的承诺?
例如最初:
foo(id: string): Promise<A> {
return new Promise((resolve, reject) => {
someAsyncPromise().then((value)=>resolve(200)).catch((err)=>reject(400))
});
}
翻译成async
/await
:
async foo(id: string): Promise<A> {
try{
await someAsyncPromise();
return 200;
} catch(error) {//here goes if someAsyncPromise() rejected}
return 400; //this will result in a resolved promise.
});
}
那么,在这种情况下,我如何正确地拒绝这个承诺呢?