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# log-update [](https://travis-ci.org/sindresorhus/log-update)
> Log by overwriting the previous output in the terminal.
> Useful for rendering progress bars, animations, etc.
## Install
```
$ npm install --save log-update
```
## Usage
```js
var logUpdate = require('log-update');
var i = 0;
var frames = ['-', '\\', '|', '/'];
setInterval(function () {
var frame = frames[i++ % frames.length];
logUpdate('\n' + ' ♥♥\n ' + frame + ' unicorns ' + frame + '\n ♥♥');
}, 100);
```
## API
### logUpdate(text, ...)
Log to stdout.
### logUpdate.clear()
Clear the logged output.
### logUpdate.done()
Persist the logged output.
Useful if you want to start a new log session below the current one.
### logUpdate.stderr(text, ...)
Log to stderr.
### logUpdate.stderr.clear()
### logUpdate.stderr.done()
### logUpdate.create(stream)
Get a `logUpdate` method that logs to the specified stream.
## Examples
- [speed-test](https://github.com/sindresorhus/speed-test) - Uses this module to render a spinner
## License
MIT © [Sindre Sorhus](http://sindresorhus.com)