Hi Jackson Tong,
Thank you for the update. Currently, support for comparing PDF documents directly using the Syncfusion JavaScript PDF Viewer is not available.
However, we have analyzed the feasibility of this requirement and logged it as a feature request titled “Compare PDF Documents” This feature is planned for implementation in one of our upcoming releases as part of our product roadmap, which includes several enhancements and improvements. We will keep you informed once this feature becomes available.
You can track the status of this feature request using the feedback link below:
Compare PDF documents | Feedback Portal
Regards,
Venkada Subramanian D