How would you detect that the following call to your `fileGetContent` function
should return a Promise?
```js
function oldSchool() {
return fileGetContent("foo").then(function (c) {
// ....
})
}
```
—Claude
> Le 3 déc. 2015 à 13:15, Andrea Giammarchi <[email protected]> a
> écrit :
>
> Hi there,
> just writing down some thoughts about being able to understand if a
> method/function has been executed within a generator/async and is being
> yielded/awaited.
>
> Rationale: API that would like to behave synchronously in some case,
> returning Promises in other cases.
>
> Example:
>
> ```js
> function fileGetContent(fileName) {
> // random example
> if (held) {
> return fetch(fileName).then((r)=>r.text());
> } else {
> var xhr = new XMLHttpRequest;
> xhr.open('GET', fileName, false);
> xhr.send(null);
> return xhr.responseText;
> }
> }
> ```
>
> Above example will virtually return always the same type and it could work
> inside a generator or an async function as long as it's being held.
>
> Does any of this make sense? Is it worth exploring this pattern?
>
> Thanks for any sort of thought.
>
> Best Regards
>
>
>
>
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