web/node_modules/loupe/lib/regexp.js

import { truncate } from './helpers'

export default function inspectRegExp(value, options) {
  const flags = value.toString().split('/')[2]
  const sourceLength = options.truncate - (2 + flags.length)
  const source = value.source
  return options.stylize(`/${truncate(source, sourceLength)}/${flags}`, 'regexp')
}