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doc: clarify usage of util.promisify.custom #16134

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doc: clarify usage of util.promisify.custom #16134

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doc: clarify usage of util.promisify.custom
shiya Oct 10, 2017
ca0229f
doc: remove pronouns
shiya Oct 13, 2017
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10 changes: 10 additions & 0 deletions doc/api/util.md
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Original file line number Diff line number Diff line change
Expand Up @@ -525,6 +525,16 @@ console.log(promisified === doSomething[util.promisify.custom]);
This can be useful for cases where the original function does not follow the
standard format of taking an error-first callback as the last argument.

For example, with a function that takes in `(foo, onSuccessCallback, onErrorCallback)`:

```js
doSomething[util.promisify.custom] = function(foo) {
return new Promise(function(resolve, reject) {
doSomething(foo, resolve, reject);
});
};
```

### util.promisify.custom
<!-- YAML
added: v8.0.0
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