如何仅捕获UnhandledPromiseRejectionWarning错误

Question

So I am using request with ES7 async/await. Getting 404 error is very common there. '

 try{
        status=await rp.delete(baseurl+`/images/${id}`);
        .
        .
        .

    }
    catch(e){
        // catch only UnhandledPromiseRejectionWarning error
    }

I want other errors in try block to be thrown as they are.

Answer 1

UnhandledPromiseRejectionWarning results from unhandled rejections. It's not a specific type of errors. It's a warning in the console that may result in exception in future Node versions.

Considering that current async function doesn't handle rejections in parent scope, and this code causes a rejection and UnhandledPromiseRejectionWarning :

status=await rp.delete(baseurl+`/images/${id}`);

e error in try..catch will be exactly the error that previously caused UnhandledPromiseRejectionWarning :

try {
    status=await rp.delete(baseurl+`/images/${id}`);
} catch(e){
    ...
}

I want other errors in try block to be thrown as they are.

If errors are thrown and not caught in parent scope, they will cause UnhandledPromiseRejectionWarning .