webdav/sync/jcore/web/front_end/node_modules/await-event - 志元云盘

File OriginalPic	EditTime	Size
History.md	2024-07-14 16:16:51	160 B
index.js	2024-07-14 16:16:51	274 B
LICENSE	2024-07-14 16:16:51	1.07 KB
package.json	2024-07-14 16:16:51	1.52 KB
README.md	2024-07-14 16:16:51	1.08 KB

# Await Event

A really stupid utility I use frequently for event emitters.
Allows you to `yield` an event and return the results.
I use this a lot of locking.

Note: you probably shouldn't use this for the `error` event.

## Example

```js
var PassThrough = require('stream').PassThrough

var stream = new PassThrough()
// you attach it directly on an event emitter
stream.await = require('await-event')

co(function* () {
  var chunk = yield stream.await('data')
  var chunk = yield stream.await('data')
  var chunk = yield stream.await('data')
}).catch(noop)

stream.write('some chunk')
```

You can use awaitEvent without attach on an event emitter:

```js
var EventEmitter = require('event')

var emitter = new EventEmitter()
co(function*() {
  yield awaitEvent(emitter, 'ready')
}).catch(noop)
```

When use this for `error` event, it will reject once `error` event emitted:

```js
var EventEmitter = require('event')

var emitter = new EventEmitter()
co(function*() {
  // it will throw when `error` event emitted
  yield awaitEvent(emitter, 'error')
}).catch(err => console.error(err.stack))
```

云盘

Home / 志元云盘 / webdav / sync / jcore / web / front_end / node_modules / await-event