html2canvas does not get around content policy restrictions set by your browser. Drawing images that reside outside of
the origin of the current page taint the
canvas that they are drawn upon. If the canvas gets tainted, it cannot be read anymore. As such, html2canvas implements
methods to check whether an image would taint the canvas before applying it. If you have set the
false, it will not draw the image.
If you wish to load images that reside outside of your pages origin, you can use a proxy to load the images.
Make sure that
canvas element doesn't hit browser limitations for the
The limitations vary by browser, operating system and system hardware.
Maximum height/width: 32,767 pixels Maximum area: 268,435,456 pixels (e.g., 16,384 x 16,384)
Maximum height/width: 32,767 pixels Maximum area: 472,907,776 pixels (e.g., 22,528 x 20,992)
Maximum height/width: 8,192 pixels Maximum area: N/A
The maximum size for a canvas element is 3 megapixels for devices with less than 256 MB RAM and 5 megapixels for devices with greater or equal than 256 MB RAM
As each CSS property needs to be manually coded to render correctly, html2canvas will never have full CSS support. The library tries to support the most commonly used CSS properties to the extent that it can. If some CSS property is missing or incomplete and you feel that it should be part of the library, create test cases for it and a new issue for it.
Test out html2canvas by rendering the viewport from the current page.