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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>TTY Node.js v5.3.0 Manual & Documentation</title>
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<body class="alt apidoc" id="api-section-tty">
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Node.js (1)
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<div id="column1" data-id="tty" class="interior">
<header>
<h1>Node.js v5.3.0 Documentation</h1>
<div id="gtoc">
<p>
<a href="index.html" name="toc">Index</a> |
<a href="all.html">View on single page</a> |
<a href="tty.json">View as JSON</a>
</p>
</div>
<hr>
</header>
<div id="toc">
<h2>Table of Contents</h2>
<ul>
<li><a href="#tty_tty">TTY</a><ul>
<li><a href="#tty_class_readstream">Class: ReadStream</a><ul>
<li><a href="#tty_rs_israw">rs.isRaw</a></li>
<li><a href="#tty_rs_setrawmode_mode">rs.setRawMode(mode)</a></li>
</ul>
</li>
<li><a href="#tty_class_writestream">Class: WriteStream</a><ul>
<li><a href="#tty_event_resize">Event: 'resize'</a></li>
<li><a href="#tty_ws_columns">ws.columns</a></li>
<li><a href="#tty_ws_rows">ws.rows</a></li>
</ul>
</li>
<li><a href="#tty_tty_isatty_fd">tty.isatty(fd)</a></li>
<li><a href="#tty_tty_setrawmode_mode">tty.setRawMode(mode)</a></li>
</ul>
</li>
</ul>
</div>
<div id="apicontent">
<h1>TTY<span><a class="mark" href="#tty_tty" id="tty_tty">#</a></span></h1>
<pre class="api_stability_2">Stability: 2 - Stable</pre><p>The <code>tty</code> module houses the <code>tty.ReadStream</code> and <code>tty.WriteStream</code> classes. In
most cases, you will not need to use this module directly.
</p>
<p>When Node.js detects that it is being run inside a TTY context, then <code>process.stdin</code>
will be a <code>tty.ReadStream</code> instance and <code>process.stdout</code> will be
a <code>tty.WriteStream</code> instance. The preferred way to check if Node.js is being run
in a TTY context is to check <code>process.stdout.isTTY</code>:
</p>
<pre><code>$ node -p -e "Boolean(process.stdout.isTTY)"
true
$ node -p -e "Boolean(process.stdout.isTTY)" | cat
false</code></pre>
<h2>Class: ReadStream<span><a class="mark" href="#tty_class_readstream" id="tty_class_readstream">#</a></span></h2>
<p>A <code>net.Socket</code> subclass that represents the readable portion of a tty. In normal
circumstances, <code>process.stdin</code> will be the only <code>tty.ReadStream</code> instance in any
Node.js program (only when <code>isatty(0)</code> is true).
</p>
<h3>rs.isRaw<span><a class="mark" href="#tty_rs_israw" id="tty_rs_israw">#</a></span></h3>
<p>A <code>Boolean</code> that is initialized to <code>false</code>. It represents the current "raw" state
of the <code>tty.ReadStream</code> instance.
</p>
<h3>rs.setRawMode(mode)<span><a class="mark" href="#tty_rs_setrawmode_mode" id="tty_rs_setrawmode_mode">#</a></span></h3>
<p><code>mode</code> should be <code>true</code> or <code>false</code>. This sets the properties of the
<code>tty.ReadStream</code> to act either as a raw device or default. <code>isRaw</code> will be set
to the resulting mode.
</p>
<h2>Class: WriteStream<span><a class="mark" href="#tty_class_writestream" id="tty_class_writestream">#</a></span></h2>
<p>A <code>net.Socket</code> subclass that represents the writable portion of a tty. In normal
circumstances, <code>process.stdout</code> will be the only <code>tty.WriteStream</code> instance
ever created (and only when <code>isatty(1)</code> is true).
</p>
<h3>Event: 'resize'<span><a class="mark" href="#tty_event_resize" id="tty_event_resize">#</a></span></h3>
<p><code>function () {}</code>
</p>
<p>Emitted by <code>refreshSize()</code> when either of the <code>columns</code> or <code>rows</code> properties
has changed.
</p>
<pre><code>process.stdout.on('resize', function() {
console.log('screen size has changed!');
console.log(process.stdout.columns + 'x' + process.stdout.rows);
});</code></pre>
<h3>ws.columns<span><a class="mark" href="#tty_ws_columns" id="tty_ws_columns">#</a></span></h3>
<p>A <code>Number</code> that gives the number of columns the TTY currently has. This property
gets updated on <code>'resize'</code> events.
</p>
<h3>ws.rows<span><a class="mark" href="#tty_ws_rows" id="tty_ws_rows">#</a></span></h3>
<p>A <code>Number</code> that gives the number of rows the TTY currently has. This property
gets updated on <code>'resize'</code> events.
</p>
<h2>tty.isatty(fd)<span><a class="mark" href="#tty_tty_isatty_fd" id="tty_tty_isatty_fd">#</a></span></h2>
<p>Returns <code>true</code> or <code>false</code> depending on if the <code>fd</code> is associated with a
terminal.
</p>
<h2>tty.setRawMode(mode)<span><a class="mark" href="#tty_tty_setrawmode_mode" id="tty_tty_setrawmode_mode">#</a></span></h2>
<pre class="api_stability_0">Stability: 0 - Deprecated: Use <a href="#tty_rs_setrawmode_mode">tty.ReadStream#setRawMode</a> (i.e. process.stdin.setRawMode) instead.</pre>
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