Bug: IE 11 throws an exception when HTML contains an HTML entity about survey-pdf HOT 4 OPEN

Hello,

We investigated the issue. Please, let me describe what we know now

First of all for proper work jsPDF library (which is used by SurveyPDF) you should load on page jsPDF IE polyfill. Due to some additional errors you might also use polyfill for "remove" method (probably with additional check in case of parentNode is null or modify source code of htmlToImage method below), "Array.from" method and something else

Next we faced with SecurityError when call canvas.toDataURL in our HTML to image source code. We tried set crossOrigin property of Image instance to "anonymous", but this doesn't help. Most likely because we put svg element image and canvas became tainted

To escape this we attempted to use canvg library, but it didn't work out for us. In exported PDF file we see nothing or black screen (ignoreClear option and other techniques don't help)

So as a result, unfortunately, at this moment we have no idea how process issue with exporting HTML to image in IE11. You can try to find a solution and make live sample for us (fork repository or reassign SurveyHelper.htmlToImage method for example). In this case we will investigate it and probably merge with main branch

In conclusion as a workaround you can use Edge browser (we checked this case works fine in Edge) or export HTML via our standard render with replacing ’ to ' before export according to this convention. Here is live sample of this approach (works with IE 11):

Thanks, Alex
SurveyJS Team

from survey-pdf.

Thanks for the detailed response and the workaround. We've gone ahead and replaced the instances of HTML entities to avoid the conversion to image within our survey for the time being. I'll keep an eye out for other potential solutions when time permits.

from survey-pdf.

Hello,

Fine! Feel free to contact us in case of any further questions

Thanks, Alex
SurveyJS Team

from survey-pdf.

Note for SurveyJS:

Issue can occurs due to we create new document instance (when convert to XML). New document instance has different CORS

from survey-pdf.