ceres-example/index.html at master · refrens-docs/ceres-example · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Ceres - Custom Document Renderer</title>
    <style>
      body {
        font-family: Arial, sans-serif;
        margin: 0;
        display: flex;
        justify-content: center;
        align-items: flex-start; /* Align to top */
        min-height: 100vh;
      }
      html {
        overflow-x: hidden;
      }

      @media print {
        html,
        body {
          min-height: auto !important;
          overflow: visible !important;
        }

        body {
          padding: 0 !important;
          margin: 0 !important;
          background-color: transparent !important;
          display: block !important;
          align-items: stretch !important;
        }
      }

      .error-message {
        color: red;
        text-align: center;
      }

      .loading-message {
        text-align: center;
        color: #555;
      }
    </style>
    <script>
      if (!window.location.search) {
        window.location.replace("?devMode=1");
      }
    </script>
  </head>
  <body>
    <div id="documentOutput" class="loading-message">
      Trying to load document...
    </div>
    <script>
      // Minimal bootstrap: Load vendor deps + main renderer
      Promise.all([
        fetch("./vendor-manifest.json").then(function (r) {
          if (!r.ok)
            throw new Error("Failed to fetch vendor manifest: " + r.status);
          return r.json();
        }),
        fetch("./main-manifest.json").then(function (r) {
          if (!r.ok)
            throw new Error("Failed to fetch main manifest: " + r.status);
          return r.json();
        }),
      ])
        .then(function (results) {
          var vendorManifest = results[0];
          var mainManifest = results[1];

          if (
            !vendorManifest.handlebars ||
            !vendorManifest.handlebars.js ||
            !vendorManifest.handlebars.js.trim()
          ) {
            throw new Error("Vendor manifest missing handlebars entry");
          }
          if (!mainManifest.js || !mainManifest.js.trim()) {
            throw new Error(
              "Renderer JS not found in main manifest or empty entry",
            );
          }

          // Load Handlebars first (templates depend on window.Handlebars)
          return new Promise(function (resolve, reject) {
            var hbScript = document.createElement("script");
            hbScript.src = "./" + vendorManifest.handlebars.js;
            hbScript.onload = resolve;
            hbScript.onerror = function () {
              reject(new Error("Failed to load Handlebars vendor bundle"));
            };
            document.head.appendChild(hbScript);
          }).then(function () {
            // Then load the main renderer
            var script = document.createElement("script");
            script.src = "./" + mainManifest.js;
            script.onerror = function () {
              document.getElementById("documentOutput").innerHTML =
                "Error: Failed to load renderer script";
            };
            document.head.appendChild(script);
          });
        })
        .catch(function (err) {
          document.getElementById("documentOutput").innerHTML =
            "Error: " + err.message;
        });
    </script>
  </body>
</html>