Node.js process.stdout.write is flickering in a for loop

Question

I am making a console interface, and using a for loop.

for (let i = 0; i < 100000; i++) {
  process.stdout.clearLine();
  process.stdout.cursorTo(0);
  process.stdout.write('Something: ' + i);
}

when I use this, the 'Something: i' flickers. Is there any way to make it not flicker?

EDIT: I am using the windows command prompt, is there a way to prevent the flickering there?

Answer 1

You were sooo close! So the flicker is happening because you are clearing the whole line, You need to just clear the stream(in your case STDOUT) from right side of your cursor.

According to the doc:

process.stdout.clearLine(1);

This will do the trick.

Full code from your example:

for (let i = 0; i < 100000; i++) {
  process.stdout.clearLine(1);// <<--here
  process.stdout.cursorTo(0);
  process.stdout.write('Something: ' + i);
}