# mute-stream
Bytes go in, but they don't come out (when muted).
This is a basic pass-through stream, but when muted, the bytes are
silently dropped, rather than being passed through.
## Usage
```javascript
var MuteStream = require('mute-stream')
var ms = new MuteStream(options)
ms.pipe(process.stdout)
ms.write('foo') // writes 'foo' to stdout
ms.mute()
ms.write('bar') // does not write 'bar'
ms.unmute()
ms.write('baz') // writes 'baz' to stdout
// can also be used to mute incoming data
var ms = new MuteStream
input.pipe(ms)
ms.on('data', function (c) {
console.log('data: ' + c)
})
input.emit('data', 'foo') // logs 'foo'
ms.mute()
input.emit('data', 'bar') // does not log 'bar'
ms.unmute()
input.emit('data', 'baz') // logs 'baz'
```
## Options
All options are optional.
* `replace` Set to a string to replace each character with the
specified string when muted. (So you can show `****` instead of the
password, for example.)
* `prompt` If you are using a replacement char, and also using a
prompt with a readline stream (as for a `Password: *****` input),
then specify what the prompt is so that backspace will work
properly. Otherwise, pressing backspace will overwrite the prompt
with the replacement character, which is weird.
## ms.mute()
Set `muted` to `true`. Turns `.write()` into a no-op.
## ms.unmute()
Set `muted` to `false`
## ms.isTTY
True if the pipe destination is a TTY, or if the incoming pipe source is
a TTY.
## Other stream methods...
The other standard readable and writable stream methods are all
available. The MuteStream object acts as a facade to its pipe source
and destination.
