The readable.readableHighWaterMark property in a readable stream that is used to check the value of highWaterMark used while constructing Readable streams.
Syntax:
readable.readableHighWaterMark
Return Value: It returns the value of highWaterMark used while constructing Readable streams.
Below examples illustrate the use of readable.readableHighWaterMark property in Node.js:
Example 1:
// Node.js program to demonstrate the // readable.readableHighWaterMark 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.readableHighWaterMark // Property readable.readableHighWaterMark; |
Output:
65536 read: GeeksforGeeks
Example 2:
// Node.js program to demonstrate the // readable.readableHighWaterMark Property // Accessing stream module const stream = require( 'stream' );
// Creating a stream and setting the value // of the highWaterMark const readable = new stream.Readable({
highWaterMark: 1234
}); // Calling readable.readableHighWaterMark // Property readable.readableHighWaterMark; |
Output:
1234
Reference: https://nodejs.org/api/stream.html#stream_readable_readablehighwatermark.