nodejs how to read keystrokes from stdin

by

For those finding this answer since this capability was stripped from tty, here’s how to get a raw character stream from stdin:

var stdin = process.stdin;

// without this, we would only get streams once enter is pressed
stdin.setRawMode( true );

// resume stdin in the parent process (node app won't quit all by itself
// unless an error or process.exit() happens)
stdin.resume();

// i don't want binary, do you?
stdin.setEncoding( 'utf8' );

// on any data into stdin
stdin.on( 'data', function( key ){
  // ctrl-c ( end of text )
  if ( key === '\u0003' ) {
    process.exit();
  }
  // write the key to stdout all normal like
  process.stdout.write( key );
});

pretty simple – basically just like process.stdin’s documentation but using setRawMode( true ) to get a raw stream, which is harder to identify in the documentation.

More Related Contents:

  1. Reading console input in Kotlin
  2. What is the recommended way to make a numeric TextField in JavaFX?
  3. How to remove trailing and leading whitespace for user-provided input in a batch file?
  4. Can anyone help me to create a Verilog testbench?
  5. How to read an integer input from the user in Rust 1.0?
  6. How to read from stdin line by line in Node
  7. Nodejs Child Process: write to stdin from an already initialised process
  8. What is the difference between a User and a GuildMember in discord.js?
  9. Node.js document is not defined
  10. How can I scrape pages with dynamic content using node.js?
  11. Get and Set a Single Cookie with Node.js HTTP Server
  12. Mongoose, update values in array of objects
  13. Limit concurrency of promise being run
  14. How, in general, does Node.js handle 10,000 concurrent requests?
  15. Maximum call stack size exceeded on npm install
  16. is there a max size to the length of a hidden input in html?
  17. Performance of NodeJS with large amount of callbacks
  18. Launch an external application from node.js
  19. Enable Access-Control-Allow-Origin for multiple domains in Node.js [duplicate]
  20. jQuery autocomplete for dynamically created inputs
  21. Importing in Node.js: error “Must use import to load ES Module” [duplicate]
  22. Using Express and Node, how to maintain a Session across subdomains/hostheaders
  23. How does require work with new operator in node.js?
  24. How to pass the value of a variable to the standard input of a command?
  25. Node Sass does not yet support your current environment: Windows 64-bit with Unsupported runtime (88)
  26. Combining node.js and Python
  27. Laravel change input value
  28. ENOENT: no such file or directory .?
  29. What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?
  30. Can’t get rid of header X-Powered-By:Express

Leave a Comment