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45 lines
1.5 KiB
45 lines
1.5 KiB
4 years ago
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# currently-unhandled [](https://travis-ci.org/jamestalmage/currently-unhandled) [](https://coveralls.io/github/jamestalmage/currently-unhandled?branch=master)
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> Track the list of currently unhandled promise rejections.
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## Install
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```
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$ npm install --save currently-unhandled
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```
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## Usage
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```js
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const currentlyUnhandled = require('currently-unhandled')(); // <- note the invocation
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var fooError = new Error('foo');
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var p = Promise.reject(new Error('foo'));
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// on the next tick - unhandled rejected promise is added to the list:
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currentlyUnhandled();
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//=> [{promise: p, reason: fooError}]'
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p.catch(() => {});
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// on the next tick - handled promise is now removed from the list:
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currentlyUnhandled();
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//=> [];
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```
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## API
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### currentlyUnhandled()
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Returns an array of objects with `promise` and `reason` properties representing the rejected promises that currently do not have a rejection handler. The list grows and shrinks as unhandledRejections are published, and later handled.
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## Browser Support
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This module can be bundled with `browserify`. At time of writing, it will work with native Promises in the Chrome browser only. For best cross-browser support, use `bluebird` instead of native Promise support in browsers.
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## License
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MIT © [James Talmage](http://github.com/jamestalmage)
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