# tty

***

**1. Raw Mode Input and Output**

```js
// Enter raw mode
process.stdin.setRawMode(true);

// Read input from the terminal
process.stdin.on('data', data => {
  console.log(data.toString());
});
```

**2. Output Customization**

```js
// Set terminal window title
process.stdout.write('\x1b]0;Node.js Terminal\x07');

// Change text color
console.log('\x1b[31mThis is red text\x1b[0m');
```

**3. Terminal Cursor Control**

```js
// Save cursor position
const savedCursorPosition = process.stdout.cursorTo(0, 0);

// Move cursor to a specified position
process.stdout.cursorTo(10, 5);

// Restore cursor position
process.stdout.cursorTo(savedCursorPosition);
```

**4. Tab Completion**

```js
const readline = require('readline');
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  completer: (line) => {
    return [
      'apple',
      'banana',
      'cherry'
    ];
  }
});
```

**5. Line Editing**

```js
const readline = require('readline');
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.on('line', (line) => {
  // Handle the user input
  console.log(`You entered: ${line}`);
  rl.close();
});
```

**6. Terminal Size**

```js
const chalk = require('chalk');
const { exec } = require('child_process');

exec('stty size', (error, stdout, stderr) => {
  if (error) {
    console.log(`Error getting terminal size: ${error.message}`);
    return;
  }

  const [rows, cols] = stdout.split(' ').map(Number);
  console.log(chalk.green(`Terminal size: ${cols} columns, ${rows} rows`));
});
```

**7. Screen Clearing**

```js
// Clear the terminal screen
console.log('\x1b[2J');
```

**8. Custom Terminal Prompt**

```js
const chalk = require('chalk');
const { write } = process.stdout;

// Set custom prompt
write(chalk.red('Custom Prompt > '));
```

**9. Terminal History**

```js
const readline = require('readline');
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.on('history', (history) => {
  // Show command history
  console.log(history);
});
```

**10. Terminal Prompt**

```js
const readline = require('readline');
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

// Set prompt message
rl.setPrompt('> ');
```

**11. Terminal Password Input**

```js
const readline = require('readline');
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

// Hide password input
rl.setPrompt('Password: ');
rl.input.setRawMode(true);
rl.input.setMask('*');
```

**12. Terminal Input Validation**

```js
const readline = require('readline');
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

// Validate input using a regular expression
rl.question('Enter a number: ', (number) => {
  if (!/\d+/.test(number)) {
    console.log('Invalid input. Please enter a number.');
    rl.close();
  }
  else {
    console.log(`You entered: ${number}`);
    rl.close();
  }
});
```

**13. Terminal Multiple Choice Input**

```js
const readline = require('readline');
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

// Offer multiple choices
rl.question('Select an option: (a/b/c)', (option) => {
  if (['a', 'b', 'c'].includes(option)) {
    console.log(`You selected: ${option}`);
    rl.close();
  }
  else {
    console.log('Invalid option. Please choose a, b, or c.');
    rl.close();
  }
});
```

**14. Terminal Table Output**

```js
const table = require('table');

// Create a table
const data = [
  ['Column 1', 'Column 2', 'Column 3'],
  ['Data 1', 'Data 2', 'Data 3'],
  ['Data 4', 'Data 5', 'Data 6']
];

const output = table.table(data);

// Print the table
console.log(output);
```

**15. Terminal Progress Bar**

```js
const figlet = require('figlet');
const ora = require('ora');

// Create a progress bar
const spinner = ora('Loading...');

// Start the progress bar
spinner.start();

// Perform some async operation
setTimeout(() => {
  // Stop the progress bar
  spinner.stop();

  // Show the figlet output
  console.log(figlet.textSync('Done!'));
}, 3000);
```

**16. Terminal File Tree**

```js
const figlet = require('figlet');
const ora = require('ora');
const treeify = require('treeify');

// Create a file tree
const tree = treeify.asTree({
  '/bin': {
    'bash': null,
    'ls': null
  },
  '/etc': {
    'passwd': null
  },
  '/home': {
    'user': {
      'documents': {
        'file1.txt': null,
        'file2.txt': null
      }
    }
  }
});

// Show the figlet output
console.log(figlet.textSync('File Tree'));

// Print the file tree
console.log(tree);
```

**17. Terminal Animated GIF**

```js
const chalk = require('chalk');
const ora = require('ora');

// Create an animated GIF
const spinner = ora({
  text: 'Loading...',
  spinner: 'dots'
});

// Start the animation
spinner.start();

// Perform some async operation
setTimeout(() => {
  // Stop the animation
  spinner.stop();

  // Show the animated GIF
  const gif = chalk.cyanBright('Loading...');
  console.log(gif);
}, 3000);
```

**18. Terminal Markdown**

```js
const chalk = require('chalk');
const markdown = require('markdown-js');

// Create a markdown string
const md = `# Header 1\n## Header 2\n* List item 1\n* List item 2`;

// Convert markdown to HTML
const html = markdown.parse(md);

// Render the HTML in the terminal
console.log(chalk.greenBright(html));
```

**19. Terminal Chart**

```js
const figlet = require('figlet');
const boxen = require('boxen');

// Create a chart
const chart = `
+--------------+
| Column 1 | Column 2 |
+--------------+----------+
| Data 1       | Data 2    |
| Data 3       | Data 4    |
+--------------+----------+
`;

// Show the figlet output
console.log(figlet.textSync('Chart'));

// Print the chart
console.log(boxen(chart, { padding: 1 }));
```

**20. Terminal ASCII Art**

```js
const figlet = require('figlet');

// Create ASCII art
const art = figlet.textSync('ASCII Art');

// Show the ASCII art
console.log(art);
```

**21. Terminal Audio Playback**

```js
const speaker = require('speaker');

// Create speaker instance
const spk = new speaker({
  channels: 1,
  bitDepth: 16,
  sampleRate: 44100
});

// Play a sound file
spk.play('./sound.wav');
```

**22. Terminal Video Playback**

```js
const fs = require('fs');
const { spawn } = require('child_process');

// Create video player
const player = spawn('mplayer', ['-really-quiet', './video.mp4']);

// Pipe video output to the terminal
player.stdout.pipe(process.stdout);
```

**23. Terminal Image Display**

```js
const chalk = require('chalk');
const image = require('image-to-ascii');

// Convert image to ASCII art
image('./image.jpg', (err, ascii) => {
  if (err) {
    console.log(err);
    return;
  }

  // Show the ASCII art
  console.log(chalk.cyanBright(ascii));
});
```

**24. Terminal Text Animation**

```js
const chalk = require('chalk');
const ora = require('ora');

// Create an animated text
const spinner = ora({
  text: 'Loading...',
  spinner: {
    interval: 80,
    frames: [
      '⠋',
      '⠙',
      '⠹',
      '⠸',
      '⠼',
      '⠴',
      '⠦',
      '⠧',
      '⠇',
      '⠏'
    ]
  }
});

// Start the animation
spinner.start();

// Perform some async operation
setTimeout(() => {
  // Stop the animation
  spinner.stop();

  // Show the animated text
  const text = chalk.magentaBright('Done!');
  console.log(text);
}, 3000);
```

**25. Terminal Color Palette**

```js
const chalk = require('chalk');

// Create a color palette
const palette = [
  'red',
  'green',
  'yellow',
  'blue',
  'magenta',
  'cyan',
  'white'
];

// Show the color palette
for (const color of palette) {
  console.log(chalk[color](`This is ${color} color.`));
}
```

**26. Terminal Custom Prompt**

```js
const chalk = require('chalk');
const readline = require('readline');

// Create a custom prompt
const prompt = chalk.magentaBright('my-custom-prompt > ');

// Create a readline interface
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  prompt
});

// Start the readline interface
rl.prompt();
```

**27. Terminal History Search**

```js
const readline = require('readline');

// Create a readline interface
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

// Enable history search
rl.historySearch = true;

// Start the readline interface
rl.prompt();
```

**28. Terminal Autocomplete**

```js
const readline = require('readline');
const completer = require('readline/lib/completer');

// Create a readline interface
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  completer
});

// Add some completions
rl.tabCompleter = (line) => {
  return [
    'apple',
    'banana',
    'cherry'
  ];
};

// Start the readline interface
rl.prompt();
```

**29. Terminal Keyboard Shortcuts**

```js
const readline = require('readline');

// Create a readline interface
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

// Add a keyboard shortcut
rl.on('key', (key) => {
  if (key.ctrl && key.name === 'c') {
    rl.close();
  }
});

// Start the readline interface
rl.prompt();
```

**30. Terminal Command Line Arguments**

```js
const args = process.argv;

// Parse command line arguments
for (const arg of args) {
  console.log(arg);
}
```

**31. Terminal Environment Variables**

```js
const env = process.env;

// Get environment variables
for (const key in env) {
  if (env.hasOwnProperty(key)) {
    const value = env[key];
    console.log(`${key}: ${value}`);
  }
}
```

**32. Terminal Child Processes**

```js
const { exec } = require('child_process');

// Create a child process
exec('ls', (error, stdout, stderr) => {
  if (error) {
    console.log(`Error: ${error.message}`);
    return;
  }

  // Get the stdout and stderr outputs
  console.log(`Stdout: ${stdout}`);
  console.log(`Stderr: ${stderr}`);
});
```

**33. Terminal Signal Handling**

```js
process.on('SIGINT', () => {
  console.log('Received SIGINT signal. Exiting...');
  process.exit();
});

process.on('SIGTERM', () => {
  console.log('Received SIGTERM signal. Exiting...');
  process.exit();
});
```

**34. Terminal File System Access**

```js
const fs = require('fs');

// Read a file
fs.readFile('./file.txt', 'utf8', (error, data) => {
  if (error) {
    console.log(`Error reading file: ${error.message}`);
    return;
  }

  // Get the file contents
  console.log(`File contents: ${data}`);
});
```

**35. Terminal HTTP Request**

```js
const https = require('https');

// Make an HTTP request
https.get('https://www.google.com', (res) => {
  console.log('Received HTTP response.');

  // Get the response data
  res.on('data', (data) => {
    console.log(`Received data: ${data}`);
  });
});
```

**36. Terminal WebSocket Connection**

```js
const WebSocket = require('ws');

// Create a WebSocket connection
const ws = new WebSocket('ws://localhost:8080');

// Handle WebSocket events
ws.on('open', () => {
  console.log('WebSocket connection opened.');
});

ws.on('message', (data) => {
  console.log(`Received message: ${data}`);
});

ws.on('close', () => {
  console.log('WebSocket connection closed.');
});

ws.on('error', (error) => {
  console.log(`WebSocket error: ${error.message}`);
});
```