96 lines
2.6 KiB
Markdown
96 lines
2.6 KiB
Markdown
# 3.2.0
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- Add `events.once` from Node.js 11.13.0.
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To use this function, Promises must be supported in the environment. Use a polyfill like `es6-promise` if you support older browsers.
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# 3.1.0 (2020-01-08)
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`events` now matches the Node.js 11.12.0 API.
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- pass through return value in wrapped `emitter.once()` listeners
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Now, this works:
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```js
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emitter.once('myevent', function () { return 1; });
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var listener = emitter.rawListeners('myevent')[0]
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assert(listener() === 1);
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```
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Previously, `listener()` would return undefined regardless of the implementation.
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Ported from https://github.com/nodejs/node/commit/acc506c2d2771dab8d7bba6d3452bc5180dff7cf
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- Reduce code duplication in listener type check ([#67](https://github.com/Gozala/events/pull/67) by [@friederbluemle](https://github.com/friederbluemle)).
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- Improve `emitter.once()` performance in some engines
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# 3.0.0 (2018-05-25)
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**This version drops support for IE8.** `events` no longer includes polyfills
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for ES5 features. If you need to support older environments, use an ES5 shim
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like [es5-shim](https://npmjs.com/package/es5-shim). Both the shim and sham
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versions of es5-shim are necessary.
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- Update to events code from Node.js 10.x
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- (semver major) Adds `off()` method
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- Port more tests from Node.js
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- Switch browser tests to airtap, making things more reliable
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# 2.1.0 (2018-05-25)
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- add Emitter#rawListeners from Node.js v9.4
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# 2.0.0 (2018-02-02)
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- Update to events code from node.js 8.x
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- Adds `prependListener()` and `prependOnceListener()`
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- Adds `eventNames()` method
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- (semver major) Unwrap `once()` listeners in `listeners()`
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- copy tests from node.js
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Note that this version doubles the gzipped size, jumping from 1.1KB to 2.1KB,
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due to new methods and runtime performance improvements. Be aware of that when
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upgrading.
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# 1.1.1 (2016-06-22)
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- add more context to errors if they are not instanceof Error
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# 1.1.0 (2015-09-29)
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- add Emitter#listerCount (to match node v4 api)
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# 1.0.2 (2014-08-28)
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- remove un-reachable code
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- update devDeps
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## 1.0.1 / 2014-05-11
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- check for console.trace before using it
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## 1.0.0 / 2013-12-10
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- Update to latest events code from node.js 0.10
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- copy tests from node.js
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## 0.4.0 / 2011-07-03 ##
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- Switching to graphquire@0.8.0
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## 0.3.0 / 2011-07-03 ##
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- Switching to URL based module require.
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## 0.2.0 / 2011-06-10 ##
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- Simplified package structure.
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- Graphquire for dependency management.
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## 0.1.1 / 2011-05-16 ##
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- Unhandled errors are logged via console.error
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## 0.1.0 / 2011-04-22 ##
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- Initial release
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