draw a svg with opacity

[codelandteam]

There was a issue that solved opacities problem :#210

but it doesn't work for me because some of the functions were undefined. can some one send the full function for drawing a random svg?
this is the version I'm using according to PDF-LIB website:
<script src="https://unpkg.com/[email protected]"></script> <script src="https://unpkg.com/[email protected]"></script>