我如何在 NodeJS 中编写一个 CLI 应用程序来清除终端然后恢复它

Question

I want to write an interactive command line app which clears the contents of the terminal and then restores it upon exiting, the way that linux commands like vim and less do. How can I do this with Node.js?

I can clear the terminal using console.clear() , but I'm not sure how to restore it to its original state when my app exits.

Answer 1

To answer my own question...

Turns out you need to use the alternative buffer , used by other "full screen" terminal apps like less and vim . You can do this using ANSI escape codes :

/** Call this at the start of your program */
const enableAlternativeBuffer = () =>
  process.stdout.write("\u001B[?1049h");

/** Call this before exiting your program */
const disableAlternativeBuffer = () =>
  process.stdout.write("\u001B[?1049l");