How to unregister the extension?

I register the extension with:

cxtmenu(cytoscape)

But how to unregister?

Unregistering is needed in conjunction with Webpack’s hot module replacement.

If not unregistered the extension might get registered again while development, causing this error:

Can not register `cxtmenu` for `core` since `cxtmenu` already exists in the prototype and can not be overridden

[mirkolenz]

For me, the following worked:

import cytoscape from "cytoscape";
import cxtmenu from "cytoscape-cxtmenu";

cytoscape.use(cxtmenu);
// eventually other calls to cytoscape.use()
cytoscape.use = () => {};

[jri]

Meanwhile I investigated it further and found I was wrong here:

The Cytoscape instance seems corrupted somehow then. Possibly this is because setExtension() terminates early, returning the result of overrideErr() instead the extensions map (but I’m not sure about this).

Actually it’s due to my application, not Cytoscape, that the canvas is not rendered when hot replaced. Sorry for bothering you.

But still, Cytoscape reports the console message as an error, not as a warning which I can safely ignore. That gave me the (wrong) impression the problem is in Cytoscape.

Cytoscape should display that console message as a warning, not as an error. That would have avoided the entire misunderstanding in the first place.

And still I think an explicit unregister Core call is desired. This way the overrideErr could be prevented in the first place.

Thank you for the support!