The writable.destroyed property is an inbuilt application programming interface of Stream module which is used to check the writable.destroy() method is being called or not.
Syntax:
writable.destroyed
Return Value: This property returns true if writable.destroy() method is called before it else it returns false.
Below examples illustrate the use of writable.destroyed property in Node.js:
Example 1:
// Node.js program to demonstrate the // writable.distroyed Property // Accessing stream module const stream = require( 'stream' );
// Creating a stream and creating // a write function const writable = new stream.Writable({
// Write function with its
// parameters
write: function (chunk, encoding, next) {
// Converting the chunk of
// data to string
console.log(chunk.toString());
next();
}
}); // Writing data writable.write( 'hi' );
// Again writing some data writable.write( 'hello' );
// Calling destroy function writable.destroy(); // Calling the Property writable.destroyed; |
Output:
hi hello true
Example 2:
// Node.js program to demonstrate the // writable.distroyed Property // Accessing stream module const stream = require( 'stream' );
// Creating a stream and creating // a write function const writable = new stream.Writable({
// Write function with its
// parameters
write: function (chunk, encoding, next) {
// Converting the chunk of
// data to string
console.log(chunk.toString());
next();
}
}); // Writing data writable.write( 'hi' );
// Again writing some data writable.write( 'hello' );
// Calling the Property writable.destroyed; |
Output:
hi hello false
In the above example the output is false as writable.destroy() method is not called before calling the property writable.destroyed.
Reference: https://nodejs.org/api/stream.html#stream_writable_destroyed