Using Custom font for Language Gujarati Causes regeneratorRuntime is not defined Error

[shubhamcoreform]

What were you trying to do?

When trying to use a custom font for the language Gujarati and using drawText on a text field, I'm getting an error on:

ReferenceError: regeneratorRuntime is not defined at StateMachine.match (BE\node_modules\@pdf-lib\fontkit\dist\fontkit.umd.js:35623:61) at setupSyllables (BE\node_modules\@pdf-lib\fontkit\dist\fontkit.umd.js:35996:72) at OTLayoutEngine.substitute (BE\node_modules\@pdf-lib\fontkit\dist\fontkit.umd.js:37883:18) at LayoutEngine.substitute (BE\node_modules\@pdf-lib\fontkit\dist\fontkit.umd.js:38029:20) at TTFFont.layout (BE\node_modules\@pdf-lib\fontkit\dist\fontkit.umd.js:41414:32) at CustomFontSubsetEmbedder.CustomFontEmbedder.widthOfTextAtSize (BE\node_modules\pdf-lib\cjs\core\embedders\CustomFontEmbedder.js:62:32) at PDFFont.widthOfTextAtSize (BE\node_modules\pdf-lib\cjs\api\PDFFont.js:53:30)

How did you attempt to do it?

tested with text: 'ગુજરાતી ટેક્સ્ટ' Tested with fonts: Noto Sans Gujarati

What actually happened?

What did you expect to happen?

Expecting no error.

How can we reproduce the issue?

Version

^1.17.1

What environment are you running pdf-lib in?

Node

Checklist

• [X] My report includes a Short, Self Contained, Correct (Compilable) Example.
• [ ] I have attached all PDFs, images, and other files needed to run my SSCCE.

Additional Notes

No response

[binayachaudari]

@shubhamcoreform I was having similar issue

Uncaught (in promise) ReferenceError: regeneratorRuntime is not defined
    at StateMachine2.match (fontkit.es.js:27473:60)
    at setupSyllables (fontkit.es.js:27846:71)
    at ShapingPlan2.process2 [as process] (fontkit.es.js:26228:11)
    at OTLayoutEngine2.substitute (fontkit.es.js:29733:17)
    at LayoutEngine2.substitute (fontkit.es.js:29879:19)
    at LayoutEngine2.layout (fontkit.es.js:29865:10)
    at TTFFont2.layout (fontkit.es.js:33264:31)
    at CustomFontEmbedder2.encodeText (CustomFontEmbedder.ts:64:34)
    at PDFFont2.encodeText (PDFFont.ts:72:26)
    at PDFPage2.drawText (PDFPage.ts:993:35)

How I fixed it

Installing regenerator-runtime package

npm install regenerator-runtime

and importing it on the top of particular file where we import and use custom font helped me fix the issue.

import 'regenerator-runtime/runtime';