Node.js Stream readable.readableEncoding Property

The readable.readableEncodin property in a readable Stream is utilized to get the property encoding of a stated readable stream. Moreover, you can set this property using readable.setEncoding() method.

Syntax:

readable.readableEncoding

Return Value: It returns the encoding used in the program.

Below examples illustrate the use of readable.readableEncoding property in Node.js:

Example 1:

// Node.js program to demonstrate the
// readable.readableEncoding Property

// Include fs module
const fs = require("fs");

// Constructing readable stream
const readable = fs.createReadStream("input.text");

// Setting the encoding
readable.setEncoding("base64");

// Instructions for reading data
readable.on('readable', () => {
  let chunk;

  // Using while loop and calling
  // read method with parameter
  while (null !== (chunk = readable.read())) {

    // Displaying the chunk
    console.log(`read: ${chunk}`);
  }
});

// Calling readableEncoding property
readable.readableEncoding;

Output:

read: aGVs
read: bG8=

Example 2:

// Node.js program to demonstrate the
// readable.readableEncoding Property

// Include fs module
const fs = require("fs");

// Constructing readable stream
const readable = fs.createReadStream("input.text");

// Setting the encoding
readable.setEncoding("hex");

// Instructions for reading data
readable.on('readable', () => {
  let chunk;

  // Using while loop and calling
  // read method with parameter
  while (null !== (chunk = readable.read())) {

    // Displaying the chunk
    console.log(`read: ${chunk}`);
  }
});

// Calling readableEncoding property
readable.readableEncoding;

Output:

read: 68656c6c6f

Reference: https://nodejs.org/api/stream.html#stream_readable_readableencoding.