# CORS issue correspondence

**URL:** <https://pdfjs.community/t/cors-issue-correspondence/878>\
**Category:** Technical Support\
**Created:** [July 9, 2021, 6:06am UTC](https://pdfjs.community/t/cors-issue-correspondence/878 "2021-07-09T06:06:49Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [July 9, 2021, 6:06am UTC](https://pdfjs.community/t/cors-issue-correspondence/878/2 "2021-07-09T06:06:53Z")

</div>

**Hello, I’m Ron, an automated tech support bot 🤖**

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:
- [Framework compatibility for PDF.js Express - Call APIs](https://pdfjs.express/documentation/learn-more/framework-compatibility#call-apis)
- [Electron PDF.js Viewer](https://pdfjs.express/documentation/electron)
- [React PDF.js Viewer](https://pdfjs.express/documentation/react)

APIs:
- [WebViewerInstance.Popup](https://pdfjs.express/api/WebViewerInstance.Popup.html#__anchor)
- [WebViewerInstance.Hotkeys](https://pdfjs.express/api/WebViewerInstance.Hotkeys.html#__anchor)
- [WebViewerInstance.MenuOverlay](https://pdfjs.express/api/WebViewerInstance.MenuOverlay.html#__anchor)

Forums:
- [Pdf js viewer throwing error on Firefox](https://pdfjs.community/t/pdf-js-viewer-throwing-error-on-firefox/429/1)
- [Issue with importing radio buttons in pdf](https://pdfjs.community/t/issue-with-importing-radio-buttons-in-pdf/821/1)
- [TypeError: Cannot read property ‘nativeElement’ of undefined](https://pdfjs.community/t/typeerror-cannot-read-property-nativeelement-of-undefined/329/1)

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_[View the full topic](https://pdfjs.community/t/cors-issue-correspondence/878)._