node.js: readline.clearScreenDown(stream)

readline.clearScreenDown(stream)

The readline.clearScreenDown() method clears the given TTY stream from the current position of the cursor down.

HelloWorld.js

/* Import readline module */
var readline = require('readline');

console.log("Hello World");
console.log("Hello World");
console.log("Hello World");
console.log("Hello World");

console.log("After 2 seconds, I am going to clear the complete screen");

/* Wait for 2 seconds */
var seconds = 2;
var waitTill = new Date(new Date().getTime() + seconds * 1000);
while(waitTill > new Date()){}

readline.cursorTo(process.stdout, 0, 0)
readline.clearScreenDown(process.stdout);

Once you ran HelloWorld application, it shows below output.

Hello World

Hello World

Hello World

Hello World

After 2 seconds, I am going to clear the complete screen

After 2 seconds, it clears the previous displayed lines from terminal.

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