webrun-devtools/examples/03.screenshots-debugger.html at main · statewalker/webrun-devtools · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <title>Screenshots with Debugger API</title>
    <style>
      main {
        margin: auto;
        max-width: 1000px;
      }
      #screenshots {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1em;
      }
      #screenshots .screenshot {
        width: 100%;
        border: 1px solid gray;
      }
      #screenshots .label {
        text-align: center;
      }

      form .form-input {
        width: 500px;
        margin-bottom: 1em;
        display: flex;
        align-items: flex-start;
        align-content: stratch;
      }
      form .form-input label {
       width: 12em;
      }
      form .form-input textarea {
        width: 100%;
      }

    </style>
  </head>
  <body>
    <main>
      <h1>
        Example 3: Screenshots Using the
        <a href="https://developer.chrome.com/docs/extensions/reference/debugger/" target="_blank">
          Debugger API
        </a>
      </h1>
      <p>This page automatically creates screenshots of external sites using
        the
        <a href="https://developer.chrome.com/docs/extensions/reference/debugger/" target="_blank">
         Chrome Debugger API
        </a>.
        It will show a top panel announcing that the browser is controlled by an extension
        in the debugger mode.
      </p>

      <form>
        <div class="form-input">
          <label for="urls">Sites URLs:</label>
          <textarea name="urls" id="urls" rows="10" columns="50"></textarea>
        </div>
        <div class="form-input">
          <button id="btn-run">Make Screenshots</button>
        </div>
      </form>
      <div id="screenshots"></div>
    </main>

    <script type="module">
      import initDevTools from "https://unpkg.com/@statewalker/webrun-devtools";
      // import initDevTools from "../dist/webrun-devtools.js";

      Promise.resolve().then(main).catch(console.error);

      async function main() {
        const initialUrls = [
          'https://svelte.dev/',
          'https://astro.build',
          'https://react.dev/',
          'https://www.solidjs.com/',
          'https://vuejs.org/',
          'https://webdriver.io/',
        ]

        let apiKey;
        const btn = document.querySelector("#btn-run");
        const textarea = document.querySelector("#urls");
        textarea.value = initialUrls.join('\n');
        btn.addEventListener("click", async (ev) => {
          ev.preventDefault();
          if (!apiKey) {
            apiKey = await prompt("Enter the WebRun DevTools apiKey:", "SW_API_KEY_CHANGE_ME");
            if (!apiKey) {
              document.querySelector("#screenshots").innerHTML = "No apiKey provided. Reload the page to try again.";
              return;
            }
          }
          const urls = (textarea.value || '')
            .split('\n')
            .map(url => url.trim())
            .filter(Boolean);
          run({
            apiKey,
            urls
          });
        });
      }

      async function run({ apiKey, urls, focusWindow}) {
        const api = await initDevTools({
          apiKey
        });
        await api.debugger.onEvent((target, event, ...data) => {
          console.log('A message from the extension', target, event, data);
        })

        const tab = await api.tabs.create({
          url: 'about:blank',
        });
        const target = { tabId: tab.id };
        await api.debugger.attach(target, '1.3');
        try {
          await api.debugger.sendCommand(target, "Page.enable");
          for (let url of urls) {

            await api.debugger.sendCommand(target, "Page.navigate", { url });
            await api.debugger.$once(target, "Page.loadEventFired");
            await new Promise(resolve => setTimeout(resolve, 300));

            const { data } = await api.debugger.sendCommand(
              target,
              "Page.captureScreenshot",
              {
                format: "png"
              }
            );

            const div = document.createElement('div');
            document.querySelector("#screenshots").appendChild(div);

            const img = document.createElement('img');
            img.src = `data:image/png;base64,${data}`;
            img.className = 'screenshot';
            div.appendChild(img);
            const label = document.createElement('div');
            label.className = 'label';
            div.appendChild(label);

            const ref = document.createElement('a');
            ref.href = url;
            ref.target = '_blank';
            ref.className = 'label';
            ref.innerText = url;
            label.appendChild(ref);
          }
        } finally {
          await api.debugger.detach(target);
          await api.tabs.remove(tab.id);
        }
      }

    </script>
  </body>
</html>