使用 JavaScript 获取 PDF 页码

记一下 PDf 转图片

const pdfjsLib = require('pdfjs-dist');
...
pdfjsLib.getDocument(pdfPath).then(function (doc) {
    var numPages = doc.numPages;
    console.log('# Document Loaded');
    console.log('Number of Pages: ' + numPages);
})

参考文章

• https://stackoverflow.com/questions/10253669/how-to-get-the-number-of-pages-of-a-pdf-uploaded-by-user