As for the async feature to make a "reject" by timeout?

Question

As for the async feature to make a "reject" by timeout?

Hi all. Live example using promis:

const func = () => {
 return new Promise((resolve, reject)=>{
 let key = setTimeout(reject, 30000, 'timeout Promise');
 // Some action asynchronously for the result of the promis
removeTimeout(key);
resolve(data);
});
};

Now suppose eating takaya same situation, but the description goes through the async function
How you can implement similar in design async?

reyna.Greenholt asked August 19th 19 at 22:40

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More answers about "As for the async feature to make a "reject" by timeout?"

1 answer

reyna.Greenholt answered on · Accepted Answer · 2019-08-19T22:42:29.360Z

reyna.Greenholt answered on August 19th 19 at 22:42

Solution

He found himself rewriting in async style:

conf func = async function () {
 try {
setTimeout((message)=>{
 throw new Error(message);
 } , 30000, 'timeout Promise');
 // our asynchronous request using await 
 return result;
 } catch (e) {
 // something running
 return await Promise.reject(e);
 // Alternative variant of Dimitri:
 throw e;
 } 
};

func().tnen(console.log).catch(console.error);

return await - the excess just return
to serietitel the result of the async function throw enough
in the same way if not intercepted reject from await - this is equivalent to throw
throw inside a timeout would work on a different thread of execution (different iteration of the event loop) and therefore thrown out in the overall trace, try-catch does not intercept it

PS can you take my Libu x-promise and use the timeout
https://github.com/bingo347/x-promise/wiki/.timeout() - kara commented on August 19th 19 at 22:45

: thank you on account of exit through a throw, checked, Yes indeed you can do it, only when I test this option, I did
(async function test(){
setTimeout(()=>{
throw new Error('TEST ERROR');
}, 1000);
})().then(resp=>{console.log('then: ', resp)}).catch(resp=>{console.error('catch: ', resp)});
which led to the wrong result that I expected at this potamanov on https://developer.mozilla.org/en-US/docs/Web/JavaS... reject the idea, but Yes, catch enough to raise the error above using throw
For the link to the code thanks. wonder, I will say however, that Sachs I prefer using native tools. - reyna.Greenholt commented on August 19th 19 at 22:48