src/assets/bigtrace.html

<!doctype html>
<html lang="en-us">
<head>
  <meta charset="utf-8">
  <title>Bigtrace UI</title>
  <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" name="viewport" />
  <link rel="shortcut icon" id="favicon" type="image/png" href="data:image/png;base64,iVBORw0KGgo=">
</head>
<body data-perfetto_version='{"filled_by_build_js":"."}'>
  <!--
    Don't add any content here. The whole <body> is replaced by
    bigtrace/index.ts when bootstrapping. This is only used for very early
    error reporting.
  -->
  <style>
  #app_load_failure {opacity:0;transition:opacity 1s ease;position:absolute;overflow:auto;background:#080082;top:0;left:0;width:100%;height:100%;bottom:0;right:0;margin:0;opacity:0;user-select:text}
  #app_load_failure > pre {color:#fff;position:absolute;margin:auto;white-space:pre-wrap;top:10vh;max-width:90vw;width:880px;left:0;right:0;font-size:16px;line-height:30px;font-weight:700}
  #app_load_failure > pre span {background:#fff;color:#080082;padding:2px}
  #app_load_failure_dbg { overflow-wrap: break-word; font-size: 12px; line-height: 1; font-weight: initial;}
  #app_load_failure a {color:#fff}
  #app_load { position: absolute; top: 0; left: 0; right:0; bottom: 0; background-color: #2c3e50;}
  #app_load_spinner { margin: 30vh auto; width: 150px; height: 150px; border: 3px solid rgba(255,255,255,.3); border-radius: 50%; border-top-color: #fff; animation: app_load_spin 1s ease-in-out infinite; }
  @keyframes app_load_spin { to { transform: rotate(360deg); } }
  </style>
  <div id="app_load"><div id="app_load_spinner"></div></div>
  <div id="app_load_failure">
<pre>
<span>Bigtrace UI - An unrecoverable problem occurred</span>

If you are seeing this message, something went wrong while loading the UI.
Please file a bug (details below) and try these remediation steps:

* Force-reload the page with Ctrl+Shift+R (Mac: Meta+Shift+R) or
  Shift + click on the refresh button.

* <a href="javascript:clearAllCaches();">Clear all the site storage and caches</a> and reload the page.

* Clear the site data and caches from devtools, following <a target="_blank" href="https://developers.google.com/web/tools/chrome-devtools/storage/cache#deletecache">these instructions</a>.

In any case, **FILE A BUG** attaching logs and screenshots from devtools.
  Googlers:      <a href="http://go/perfetto-ui-bug" target="_blank">go/perfetto-ui-bug</a>
  Non-googlers:  <a href="https://github.com/google/perfetto/issues/new" target="_blank">github.com/google/perfetto/issues/new</a>

<div id=app_load_failure_err></div>
Technical Information:
<div id=app_load_failure_dbg></div>
</pre>
  </div>
  <script type="text/javascript">
    'use strict';
    (function () {
      const TIMEOUT_MS = 60000;
      let errTimerId = undefined;

      function errHandler(err) {
        // Note: we deliberately don't clearTimeout(), which means that this
        // handler is called also in the happy case when the UI loads. In that
        // case, though, the onCssLoaded() in frontend/index.ts will empty the
        // <body>, so |div| below will be null and this function becomes a
        // no-op.
        const div = document.getElementById('app_load_failure');
        if (!div) return;
        div.style.opacity ='1';
        const errDom = document.getElementById('app_load_failure_err');
        if (!errDom) return;
        console.error(err);
        errDom.innerText += `${err}\n`;
        const storageJson = JSON.stringify(window.localStorage);
        const dbg = document.getElementById('app_load_failure_dbg');
        if (!dbg) return;
        dbg.innerText = `LocalStorage: ${storageJson}\n`;
        if (errTimerId !== undefined) clearTimeout(errTimerId);
      }

      // For the 'Click here to clear all caches'.
      window.clearAllCaches = async () => {
        if (window.localStorage) window.localStorage.clear();
        if (window.sessionStorage) window.sessionStorage.clear();
        const promises = [];
        if (window.caches) {
          try {
            const keys = await window.caches.keys();
            keys.forEach(k => promises.push(window.caches.delete(k)));
          } catch (_) {
            // TODO(288483453)
          }
        }
        if (navigator.serviceWorker) {
          const regs = await navigator.serviceWorker.getRegistrations();
          regs.forEach(reg => promises.push(reg.unregister()));
        }
        try {
          await Promise.all(promises);
        } catch (_) {
          // TODO(288483453)
        }
        window.location.reload();
      }

      // If the frontend doesn't come up, make the error page above visible.
      errTimerId = setTimeout(() => errHandler('Timed out'), TIMEOUT_MS);
      window.onerror = errHandler;
      window.onunhandledrejection = errHandler;

      const versionStr = document.body.dataset['perfetto_version'] || '{}';
      const versionMap = JSON.parse(versionStr);
      const channel = localStorage.getItem('perfettoUiChannel') || 'stable';

      // The '.' below is a fallback for the case of opening a pinned version
      // (e.g., ui.perfetto.dev/v1.2.3./). In that case, the index.html has no
      // valid version map; we want to load the frontend from the same
      // sub-directory directory, hence ./frontend_bundle.js.
      const version = versionMap[channel] || versionMap['stable'] || '.';

      const script = document.createElement('script');
      script.async = true;
      script.src = version + '/bigtrace/bigtrace_bundle.js';
      script.onerror = () => errHandler(`Failed to load ${script.src}`);

      document.head.append(script);
    })();
  </script>
</body>
</html>