簡介
    PDF.js is a Portable Document Format (PDF) viewer that is built with HTML5.
    PDF.js is community-driven and supported by Mozilla Labs. Our goal is to create a general-purpose, web standards-based platform for parsing and rendering PDFs.
    開源地址：https://github.com/mozilla/pdf.js
    下載后不能直接使用，需要重新構(gòu)建，不熟悉將會非常麻煩
    HTML5在線預(yù)覽PDF的示例代碼