Node.js Stream readable.readable Property
The readable.readable property is an inbuilt application programming interface of Stream module which is used to check if it is safe to call readable.read() method.
Syntax:
readable.readable
Return Value: It returns true if readable.read() method is being called otherwise returns false.
Below examples illustrate the use of readable.readable property in Node.js:
Example 1:
// Node.js program to demonstrate the // readable.readable Property // Include fs module const fs = require('fs'); // Creating readable stream const readable = fs.createReadStream("input.txt"); // Calling readable property readable.readable; |
Output:
true
Example 2:
// Node.js program to demonstrate the // readable.readable 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 while (null !== (chunk = readable.read())) { // Displaying the chunk console.log(`read: ${chunk}`); } }); // Shows that the program // ended console.log("Program ends!!"); // Calling readable property readable.readable; |
Output:
Program ends!! true read: hello
Reference: https://nodejs.org/api/stream.html#stream_readable_readable
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