packages/react-devtools/app.html

<!DOCTYPE html>
<html>
  <head>
    <title>React Developer Tools</title>
    <meta charset="utf8" />
    <style>
      html {
        height: 100%;
        font-family: sans-serif;
      }
      body {
        height: 100%;
        margin: 0;
        padding: 0;
        background-color: #fff;
        color: #777d88;
      }

      .container {
        height: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        overflow: auto;
      }

      p {
        padding: 0;
        margin: 0;
      }

      .input {
        display: block;
        font-weight: 100;
        padding: 0 0.25rem;
        border: 1px solid #aaa;
        background-color: #fff;
        color: #666;
      }

      .link {
        color: #1478fa;
        text-decoration: none;
      }
      .link:hover {
        text-decoration: underline;
      }

      .waiting-header {
        padding: 0.5rem;
        display: inline-block;
        position: absolute;
        right: 0.5rem;
        top: 0.5rem;
        border-radius: 0.25rem;
        background-color: rgba(0,1,2,.6);
        color: white;
        border: none;
        font-weight: 100;
        font-style: italic;
      }

      .boxes {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
        padding: 1rem;
      }
      .box {
        text-align: center;
        border-radius: 0.5rem;
        background-color: #f7f7f7;
        border: 1px solid #eee;
        color: #777d88;
        padding: 1rem;
        margin-top: 1rem;
      }
      .box:first-of-type {
        margin-top: 0;
      }

      .box-header {
        text-align: center;
        color: #5f6673;
        font-size: 1.25rem;
        margin-bottom: 0.5rem;
      }
      .box-content {
        line-height: 1.5rem;
      }

      #loading-status {
        text-align: center;
        margin-top: 1rem;
      }

      .prompt,
      .confirmation {
        margin-bottom: 0.25rem;
      }

      .confirmation {
        font-style: italic;
      }

      .hidden {
        display: none;
      }
    </style>
  </head>
  <body>
    <div id="container" class="container" style="-webkit-user-select: none; -webkit-app-region: drag;">
      <div class="waiting-header">Waiting for React to connect…</div>
      <div class="boxes" style="-webkit-app-region: none;">
        <div class="box">
          <div class="box-header">React Native</div>
          <div class="box-content">
            Open the <a
              id="rn-help-link"
              class="link"
              target="_blank"
              href="https://reactnative.dev/docs/debugging#accessing-the-in-app-developer-menu"
            >in-app developer menu</a> to connect.
          </div>
        </div>
        <div class="box">
          <div class="box-header">React DOM</div>
          <div class="box-content">
            <div id="box-content-prompt" class="prompt">
              Add one of the following (click to copy):
            </div>
            <div id="box-content-confirmation" class="confirmation hidden">
              Copied to clipboard.
            </div>
            <span class="input" contenteditable="true" id="localhost"></span>
            <span class="input" contenteditable="true" id="byip"></span>
            to the top of the page you want to debug,
            <br />
            <strong>before</strong> importing React DOM.
          </div>
        </div>
        <div id="loading-status">Starting the server…</div>
      </div>
    </div>
    <script>
      const {clipboard} = require("electron");
      const port = process.env.PORT || 8097;
      const localIp = require("ip").address();
      const $ = document.querySelector.bind(document);
      const $promptDiv = $("#box-content-prompt");
      const $confirmationDiv = $("#box-content-confirmation");
      let timeoutID;

      function selectAllAndCopy(event) {
        const element = event.target;
        if (window.getSelection) {
          const selection = window.getSelection();
          const range = document.createRange();
          range.selectNodeContents(element);
          selection.removeAllRanges();
          selection.addRange(range);
          clipboard.writeText(event.target.textContent);

          $promptDiv.classList.add('hidden');
          $confirmationDiv.classList.remove('hidden');

          if (timeoutID) {
            clearTimeout(timeoutID);
          }

          timeoutID = setTimeout(() => {
            $promptDiv.classList.remove('hidden');
            $confirmationDiv.classList.add('hidden');
          }, 1000);
        }
      }

      const link = $('#rn-help-link');
      link.addEventListener('click', event => {
        event.preventDefault();
        require('electron').shell.openExternal(link.href);
      });

      const $localhost = $("#localhost");
      $localhost.innerText = `<script src="http://localhost:${port}"></` + 'script>';
      $localhost.addEventListener('click', selectAllAndCopy);
      $localhost.addEventListener('focus', selectAllAndCopy);

      const $byIp = $("#byip");
      $byIp.innerText = `<script src="http://${localIp}:${port}"></` + 'script>';
      $byIp.addEventListener('click', selectAllAndCopy);
      $byIp.addEventListener('focus', selectAllAndCopy);

      let devtools;
      try {
        devtools = require("react-devtools-core/standalone").default;
      } catch (err) {
        alert(
          err.toString() +
            "\n\nDid you run `yarn` and `yarn run build` in packages/react-devtools-core?"
        );
      }
      window.devtools = devtools;
      window.server = devtools
        .setContentDOMNode(document.getElementById("container"))
        .setStatusListener(function(status) {
          const element = document.getElementById("loading-status");
          if (element) {
            element.innerText = status;
          }
        })
        .startServer(port);
    </script>
  </body>
</html>