Node.js Stream readable.readableFlowing Property

The readable.readableFlowing property in a readable stream that utilized to check if the streams are in flowing mode or not.

Syntax:

readable.readableFlowing 

Return Value: It returns true if stream is in flowing mode else it returns false.

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

Example 1:

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

// Include fs module
var fs = require("fs");
var data = '';

// Create a readable stream
var readerStream = fs.createReadStream('input.txt');

// Handling data event
readerStream.on('data', function(chunk) {
   data += chunk;
});

// Calling readableFlowing property
readerStream.readableFlowing;

Output:

true

Example 2:

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

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

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

// 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 readable.readableFlowing
// Property
readable.readableFlowing;

Output:

false

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