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term-size 
Reliably get the terminal window size
Because process.stdout.columns doesn't exist when run non-interactively, for example, in a child process or when piped. This module even works when all the TTY file descriptors are redirected!
Confirmed working on macOS, Linux, and Windows.
Install
$ npm install --save term-size
Usage
const termSize = require('term-size');
termSize();
//=> {columns: 143, rows: 24}
API
termSize()
Returns an Object with columns and rows properties.
Related
- term-size-cli - CLI for this module
License
MIT © Sindre Sorhus