test/lib/internal/util/colors.js

Node.js 18's node:test, as an npm package

// https://github.com/nodejs/node/blob/a1b27b25bb01aadd3fd2714e4b136db11b7eb85a/lib/internal/util/colors.js
'use strict'

module.exports = {
  blue: '',
  green: '',
  white: '',
  red: '',
  gray: '',
  clear: '',
  hasColors: false,
  refresh () {
    if (process.stderr.isTTY) {
      const hasColors = process.stderr.hasColors()
      module.exports.blue = hasColors ? '\u001b[34m' : ''
      module.exports.green = hasColors ? '\u001b[32m' : ''
      module.exports.white = hasColors ? '\u001b[39m' : ''
      module.exports.red = hasColors ? '\u001b[31m' : ''
      module.exports.gray = hasColors ? '\u001b[90m' : ''
      module.exports.clear = hasColors ? '\u001bc' : ''
      module.exports.hasColors = hasColors
    }
  }
}

module.exports.refresh()