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Node.js | Stream readable.readableFlowing Property

  • Last Updated : 02 Mar, 2020

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.




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