Node.js Stream readable.readableObjectMode Property

Last Updated : 12 Oct, 2021

The readable.readableObjectMode property in a Readable Stream that is used to check the objectMode of the stream. Syntax:

readable.readableObjectMode

Return Value: It returns the Boolean value. Below examples illustrate the use of readable.readableObjectMode property in Node.js: Example 1:

javascript

// Node.js program to demonstrate the     
// readable.readableObjectMode Property
 
// Accessing readable stream module
const Readable = require('readable-stream').Readable;

// Constructing readable stream and
// setting the objectMode value
const readable = Readable({objectMode: true});

// Defining ._read method
readable._read = () => {};

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

  // Using while loop and calling
  // read method with parameter
  while (null !== (chunk = readable.read(4))) {

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

// Calling readableObjectMode
// Property
readable.readableObjectMode;
console.log("objectMode is true!!");

Output:

objectMode is true!!

Example 2:

javascript

// Node.js program to demonstrate the     
// readable.readableObjectMode Property
 
// Accessing readable stream module
const Readable = require('readable-stream').Readable;

// Constructing readable stream and
// setting the objectMode value
const readable = Readable({objectMode: false});

// Defining ._read method
readable._read = () => {};

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

  // Using while loop and calling
  // read method with parameter
  while (null !== (chunk = readable.read(4))) {

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

// Calling readableObjectMode
// Property
readable.readableObjectMode;
console.log("objectMode is false!!");