Document access element return null

Technical Support
1

Which product are you using?
PDF.js Express Viewer

PDF.js Express Version
8.7.0

Detailed description of issue

const pageContainer = document.getElementById('pageContainer' + clickedPage)

This return null

2

Hello xuanhieuduong1999,

Can you provide more information?
What is the context of this code?
Can you provide a sample to reproduce this issue?

Best regards,
Tyler