node.js: readline: rl.write(data[, key])

rl.write(data[, key])

This method writes either data or a key sequence identified by key to the output. The key argument is supported only if output is a TTY text terminal.

HelloWorld.rs

/* Import readline module */
var readline = require('readline');

/*
 * create a new readline.Interface instance that reads data from standard input
 * and write data to standard output
 */
var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.write('Hello World');
rl.close();

Output

Hello World

Below table summarise the properties of key object.

Property	Type	Description
ctrl	boolean	true to indicate the <ctrl> key.
meta	boolean	true to indicate the <Meta> key.
shift	boolean	true to indicate the <Shift> key
name	string	The name of a key.

Note

a.   The key argument is supported only if output is a TTY text terminal.

b.   If key is specified, data is ignored.

c.   If the readline.Interface was created with output set to null or undefined the data and key are not written.

d.   rl.write() will resume the input stream if it has been paused.

HelloWorld.rs

/* Import readline module */
var readline = require('readline');

var rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});

console.log("Type something and press Ctrl + u to delete that line");

// Simulate Ctrl+u to delete the line written previously
rl.write(null, { ctrl: true, name: 'u' });

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