mergepdf/index.html at main · ejin-430/mergepdf · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>PDF Merger</title>
  <script src="https://unpkg.com/pdf-lib/dist/pdf-lib.min.js"></script>
  <style>
    body {
      font-family: sans-serif;
      text-align: center;
      margin-top: 40px;
    }
    #drop-zone {
      border: 2px dashed #888;
      border-radius: 10px;
      padding: 30px;
      width: 400px;
      margin: auto;
      background: #f9f9f9;
      color: #333;
    }
    #drop-zone.hover {
      background: #e0f7fa;
    }
    #file-list {
      margin-top: 20px;
      font-size: 14px;
    }
    #merge-btn {
      margin-top: 20px;
      padding: 10px 20px;
      font-size: 16px;
      cursor: pointer;
    }
    #download-link {
      display: none;
      margin-top: 20px;
    }
    input[type="file"] {
      display: none;
    }
    label[for="file-input"] {
      display: inline-block;
      margin: 15px;
      background: #007bff;
      color: white;
      padding: 8px 16px;
      border-radius: 5px;
      cursor: pointer;
    }
    .spinner {
      border: 3px solid #ccc;
      border-top: 3px solid white;
      border-radius: 50%;
      width: 16px;
      height: 16px;
      margin-right: 8px;
      animation: spin 1s linear infinite;
      display: none;
      vertical-align: middle;
    }
    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

  </style>
</head>
<body>

<h1>Merge PDF Files (Max 10)</h1>

<label for="file-input">Add PDF Files</label>
<div id="drop-zone">Or Drop PDF files here</div>
<input type="file" id="file-input" multiple accept="application/pdf" />

<div id="file-list"></div>
<button id="merge-btn" disabled>
  <span class="spinner" id="spinner"></span>
  <span id="merge-text">Merge PDFs</span>
</button>
<a id="download-link" download="merged.pdf">Download Merged PDF</a>

<script>
  const dropZone = document.getElementById("drop-zone");
  const fileInput = document.getElementById("file-input");
  const fileListDisplay = document.getElementById("file-list");
  const mergeBtn = document.getElementById("merge-btn");
  const downloadLink = document.getElementById("download-link");
  const spinner = document.getElementById("spinner");

  let uploadedFiles = [];

  function updateFileList() {
    fileListDisplay.innerHTML = uploadedFiles.map(f => `📄 ${f.name}`).join("<br>");
    mergeBtn.disabled = uploadedFiles.length < 2 || uploadedFiles.length > 10;
  }

  function handleFiles(files) {
    const newFiles = Array.from(files).filter(f => f.type === "application/pdf");
    if (uploadedFiles.length + newFiles.length > 10) {
      alert("You can upload a maximum of 10 PDF files.");
      return;
    }
    uploadedFiles.push(...newFiles);
    updateFileList();
  }

  dropZone.addEventListener("dragover", e => {
    e.preventDefault();
    dropZone.classList.add("hover");
  });

  dropZone.addEventListener("dragleave", () => {
    dropZone.classList.remove("hover");
  });

  dropZone.addEventListener("drop", e => {
    e.preventDefault();
    dropZone.classList.remove("hover");
    handleFiles(e.dataTransfer.files);
  });

  fileInput.addEventListener("change", e => {
    handleFiles(e.target.files);
    fileInput.value = '';
  });

  mergeBtn.addEventListener("click", async () => {
    // Show spinner and disable button
    spinner.style.display = "inline-block";
    document.getElementById("merge-text").textContent = "Merging...";
    mergeBtn.disabled = true;
    mergeBtn.style.opacity = "0.6";
    downloadLink.style.display = "none";

    // Fake delay
    await new Promise(resolve => setTimeout(resolve, 2000));

    try {
      const mergedPdf = await PDFLib.PDFDocument.create();

      for (const file of uploadedFiles) {
        const bytes = await file.arrayBuffer();
        const pdf = await PDFLib.PDFDocument.load(bytes, { ignoreEncryption: true });
        const pages = await mergedPdf.copyPages(pdf, pdf.getPageIndices());
        pages.forEach(p => mergedPdf.addPage(p));
      }

      const mergedBytes = await mergedPdf.save();
      const blob = new Blob([mergedBytes], { type: "application/pdf" });
      downloadLink.href = URL.createObjectURL(blob);
      downloadLink.style.display = "inline-block";
      downloadLink.textContent = "Download Merged PDF";
    } catch (err) {
      console.error("PDF merge failed:", err);
      alert("An error occurred while merging. See console for details.");
    }

    // Hide spinner and restore button
    spinner.style.display = "none";
    document.getElementById("merge-text").textContent = "Merge PDFs";
    mergeBtn.disabled = false;
    mergeBtn.style.opacity = "1";
  });
</script>
</body>
</html>