Is there a way to remove the last line of output?

Question

A very simple program that prints 3 lines of output:

console.log('a');
console.log('b');
console.log('c');

Is there any way from the program to delete the last line after printing it ?, i.e.

console.log('a');
console.log('b');
console.log('c');
eraseLastLine();
console.log('C');

which will produce:

a
b
C

Answer 1

A simple solution is not to print a newline (i.e. not to use console.log).

• Use process.stdout.writelines without the EOL character to print.
• Use the carriage return character ( \r) to return to the beginning of the line.
• Use \e[Kto clear all characters from the cursor position to the end of the line.

Example:

process.stdout.write("000");
process.stdout.write("\n111");
process.stdout.write("\n222");

The output in this line will be:

000
111
222

However, if you do:

process.stdout.write("000");
process.stdout.write("\n111");
process.stdout.write("\n222");
process.stdout.write("\r\x1b[K")
process.stdout.write("333");

Output:

000
111
222\r\x1b[K
333

:

000
111
333

Answer 2

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Answer 3

The following works for me:

process.stdout.clearLine();
process.stdout.cursorTo(0);