[Feature] Multiple file-url support #312
Description
Is your feature request related to a problem? Please describe.
unpkg.com could down sometimes: unpkg/unpkg#412
cdn.jsdelivr.net is more stable, but its cache may result outdated info: https://www.jsdelivr.com/documentation#id-caching
Describe the solution you'd like
As title, try unpkg.com first, when it fails, fallback to cdn.jsdelivr.net
Describe alternatives you've considered
N/A
Additional context
N/A