Get width of terminal in Node.js

Question

console.log(process.env.COLUMNS)

Yields undefined, although,

$ echo $COLUMNS

Outputs as expected:

<

Answer 1

console.log('Terminal size: ' + process.stdout.columns + 'x' + process.stdout.rows);

And the output looks like e.g. "Terminal size: 80x24". There is also an event if the console size changes.

It's explained under tty in the docs.