Get all node_modules/npm package names from webpage if published (eg. Trello)

get_node_modules.js

main = async (url) => {
  
  let el = document.createElement('div')
  el.innerHTML = await fetch(url).then(res => res.text())

  const scripts = el.querySelectorAll('script')

  const scriptCodes = await Promise.all(Array.from(scripts).filter(script => script.src).map(script => script.src).map(async url => {
    const code = await fetch(url).then(res => res.text()).catch(e => null)
    return code
  }))

  const nodeModules = Array.from(new Set(scriptCodes.join('').match(/node_modules(\/(?!@).+?\/|\/(.+?\/.+?\/))/g))).map(str => str.replace('node_modules/', '').replace(/\/$/, ''))
  
  return nodeModules
}

main(PASS_WEBPAGE_URL_HERE) // eg. main('https://trello.com/b/AwYSWOyt/ultimate-to-do-list')