adding transparency to nodes which are not selected

Hi,
I am trying to add transparency to nodes which are not selected , is any VivaGraphJS API available to get this done ? I tried to do using JS and CSS but it's ending up crashing the browser.
let me know is any way to get this done.

Thanks
Srikanth

No file or test is named. Start by locating VivaGraphJS's node-selection and rendering entry points, then reproduce the reported browser crash with the JavaScript/CSS approach; done means establishing whether a supported transparency API exists and documenting or exposing the required behavior.

Written by the indexing model from the issue text.