jsPDF:使用新的.html()方法时未加载html2canvas [英] jsPDF: html2canvas not loaded while using new .html() method

问题描述

我想使用 jsPDF.html 将html页面转换为pdf，并且我正在使用以下代码:

I want to use jsPDF.html to convert html page to pdf, and I'm using this code:

savePdf () {
  var pdf = new jsPDF({unit: 'mm', format: 'a4', orientation: 'portrait' })
  pdf.html(document.getElementById('printable-cv'), {
    callback: function (pdf) {
      pdf.save('cv-a4.pdf');
    }
  })
}

但出现错误html2canvas not loaded:是我忘记了什么吗?我确实有html2canvas

but I get error html2canvas not loaded: is it something I forgot? I do have html2canvas

"html2canvas":"^ 1.0.0-alpha.12"

"html2canvas": "^1.0.0-alpha.12"

我正在将vuejs与webpack一起使用.

I'm using vuejs with webpack.

在同一页面上，我当前正在使用 html2pdf 并使用以下代码:

In the same page I'm currently using alternatively html2pdf with the following code:

savePdf0 () {
  let opt = {
    filename: 'cv.pdf',
    enableLinks: true,
    image: { type: 'jpeg', quality: 0.98 },
    html2canvas: {
      scale: 8,
      useCORS: true,
      width: 310,
      letterRendering: true,
    },
    jsPDF: { unit: 'mm', format: 'a4', orientation: 'portrait' },
  }
  html2pdf().set(opt).from(document.getElementById('printable-cv')).save()
}

正确找到html2canvas的

.

that correcly finds html2canvas.

html2canvas not loaded的真正含义是什么?我该怎么做才能加载它?

What does html2canvas not loaded really mean? what can I do to load it?

推荐答案

jsPDF需要在全局范围内声明html2canvas才能工作，因此您必须编写

jsPDF needs html2canvas to be declared in the global scope to work, so you have to write

window.html2canvas = html2canvas;

在致电html()之前的某个地方.

somewhere before you call html().

也就是说，我也无法使其正常工作，所以我求助于一个包装器可以通过手动调用html2canvas()然后将生成的画布提供给jsPDF来解决该问题.

That said, I wasn't able to make it work either, so I resorted to a wrapper that works around the issue by calling manually html2canvas() then giving the resulting canvas to jsPDF.

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