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How to detect if the type of the process.stdout/stdin is a terminal or a pipe/file? A snipped in JavaScript is required:

function isTerminal(){ ...... }
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The easiest way to identity if the type of the process.stdout is a pipe/file would be process.stdout.isTTY (0.8 +):

$ node -p -e "Boolean(process.stdout.isTTY)" | cat false $ node -p -e "Boolean(process.stdout.isTTY)" true

You can also test the following with the tty module for finer grained control:

if (require('tty').isatty(1)) { // terminal }
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