itemize-pull-requests.js

// ==UserScript==
// @name         Itemize Pull Requests
// @version      0.1
// @author       ton1517
// @namespace    ton1517
// @match        https://github.com/*
// @grant        none
// ==/UserScript==

;(function () {
  'use strict'
  function itemizePullRequests() {
    if (document.querySelector('.itemize-pull-requests')) return
    const btn = document.createElement('button')
    btn.type = 'button'
    btn.className = 'btn itemize-pull-requests'
    btn.innerHTML = 'Itemize Pull Requests'
    btn.onclick = async function () {
      const prTextField = document.querySelector('.js-comment-field')
      if (!prTextField) return
      const prs = []
      document.querySelectorAll('.js-issue-link').forEach((e, i) => {
        prs[i] = fetch(e.dataset.url, { headers: { Accept: 'application/json' } })
          .then((res) => res.json())
          .then((res) => `* ${res.title} ${e.text}`)
      })
      const results = await Promise.all(prs)
      prTextField.textContent = results.join('\n')
    }
    document.querySelector('.timeline-comment-wrapper').append(btn)
  }

  new MutationObserver(() => {
    if (location.href.match(/https?:\/\/github.com\/.*\/compare\/.*/)) {
      itemizePullRequests()
    }
  }).observe(document.body, { attributes: true })
})()