While I try to change header titles by passing array of titles to options like below it does not override the headers. Instead it writes new headers first and original data with old headers again from next cell.

I am experiencing the same problem.

In addition, sheets js is mutating the header array passed in, which is not something I would ever expect.

Example:

const head

This would be a nice little feature to have, Excel users are using this a lot.

Add a terminal UI for Luckysheet, probably using blessed library: https://github.com/chjj/blessed (if your API is in nodeJS; works, but frozen), or https://github.com/jquast/blessed (if your API can be bound to Python; works, and is actively maintained), or use mighty old ncurses (in C; for the bold...). This would of course use the existing Lu