Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'querySelector')

Technical Support
1

Product: PDF.JS Express Viewer

Product Version: 8.7.0

Please give a brief summary of your issue: Angular build throwing querySelector Error in console

Please describe your issue and provide steps to reproduce it:
I’m running the Angular Sample build and I’m getting the following error in the console:
Uncaught (in promise) TypeError: Cannot read properties of undefined (reading ‘querySelector’)

Please provide a link to a minimal sample where the issue is reproducible: Just download the Angular Sample build from GitHub - pdfjs-express/pdfjs-express-viewer-angular-sample , which is the URL provided in the docs. Run npm install and npm start.

2

Hi Alex,

Thank you for contacting us.

We’re currently looking into the issue and will update you the progress if we have more details.

3

Hello AlexA,

We have a post here on the PDFJS Express community forum with a build that fixes this issue: Express Viewer Pan does not work: "undefined (reading 'querySelector')" -> #pageWidgetContainer - #9 by tgordon - Technical Support - PDF.js Express

Let me know if this works for you!

Best regards,
Tyler Gordon
Web Development Support Engineer
PDFTron