js 展示pdf

<a href="your_file.pdf" target="_blank">查看 PDF</a>

<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.10.377/pdf.min.js"></script>

<canvas id="pdf-canvas"></canvas>

// 加载 PDF 文件
pdfjsLib.getDocument('your_file.pdf').promise.then(function(pdf) {
  // 获取第一页
  pdf.getPage(1).then(function(page) {
    var scale = 1.5;
    var viewport = page.getViewport({ scale: scale });

    // 准备 canvas 的上下文
    var canvas = document.getElementById('pdf-canvas');
    var context = canvas.getContext('2d');
    canvas.height = viewport.height;
    canvas.width = viewport.width;

    // 渲染页面
    var renderContext = {
      canvasContext: context,
      viewport: viewport
    };
    page.render(renderContext);
  });
});