The ‘resume’ Event in a Readable Stream is emitted when stream.resume() is being called and readableFlowing property is not true.
Syntax:
Event: 'resume'
Return Value: It is emitted if readable.resume() is being called else it is not emitted.
Below examples illustrate the use of resume event in Node.js:
Example 1:
// Node.js program to demonstrate the // readable resume event // Including fs module const fs = require( 'fs' );
// Constructing readable stream const readable = fs.createReadStream( "input.txt" );
// Handling data event readable.on( 'data' , (chunk) => {
console.log(`${chunk}`);
}); // Calling pause method readable.pause()
// Calling resume method
readable.resume();
// Handling resume event
readable.on( 'resume' , () => {
console.log( "resume emitted!" );
}); console.log( "Program ends...." );
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Output:
Program ends.... resume emitted! GeeksforGeeks
Example 2:
// Node.js program to demonstrate the // readable resume event // Including fs module const fs = require( 'fs' );
// Constructing readable stream const readable = fs.createReadStream( "input.txt" );
// Handling data event readable.on( 'data' , (chunk) => {
console.log(`${chunk}`); // Calling pause method
readable.pause();
// After this any data will be displayed
// after 3 sec.
console.log( 'No additional data will "
+ "be displayed for 3 seconds.' );
// Using setTimeout function
setTimeout(() => {
console.log( 'Now data starts flowing again.' );
// Calling resume method
readable.resume();
// Emitting resume event
readable.on( "resume" , () => {
console.log( "resume emitted!" );
}); }, 3000);
}); console.log( "Done...." );
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Output:
Done.... GeeksforGeeks No additional data will be displayed for 3 seconds. Now data starts flowing again. resume emitted!
Reference: https://nodejs.org/api/stream.html#stream_event_resume