问题

I'm trying to use html2canvas.js (https://html2canvas.hertzen.com/) to take screenshots with JavaScript. However, I have a problem when the page contains SVG text elements.

As you can see on the screenshots below, the text element is duplicated (and only one of the copies keep the right font family).

Original body

Canvas copy

Here is my code

HTML

<svg width="600" height="200" style="background-color:lightblue;">
  <text transform="translate(100, 100)" style="font-size:60px; font-family: 'Oswald'">Hello world</text>
</svg>

<br/>
<button id="createCanvasButton">Create canvas !</button>

CSS

@import url(//fonts.googleapis.com/css?family=Oswald);

$('#createCanvasButton').on('click', function() {
  html2canvas(document.body).then(function(canvas) {
    document.body.appendChild(canvas);
  });
});

jsFiddle
https://jsfiddle.net/AndreLovichi/571t86u4/

Note
I've been looking for a similar issue, and I've found this one: SVG Text attribute is doubling - HTML2CANVAS.
However, the patch on NodeParser.prototype.getChildren didn't work for me: the remaining text element had the wrong font family.

Thanks a lot!

回答1:

note

I updated on your code. Please add font base64 in svg. Maybe I answered too late ：），This is the first answer I use stackoverflow The font need change dataURI insert in SVG

JS

const request = new XMLHttpRequest();
request.open("get", './xxx/demo.woff');
request.responseType = "blob";
request.onloadend = () => { let fontDemoDataURI = reader.result }

html

    <svg>
         <style>
          @font-face {
          font-family: 'Oswald';
              src: url(data:application/font-woff;base64,d09GRgABAAAAOtXY........ED==);
          </style>
    </svg>