Does theming work for custom nodes?

[dacox]

I got the impression from reading https://lexical.dev/docs/getting-started/theming that I could simply attach css classes by doing nodeType: className.

However, on second reading, it seems that this only works for built in nodes. I'm having trouble finding confirmation.

Is this the case?

If not, how can I theme custom nodes (without explicitly attaching css classes in createDOM?

[moy2010]

No, theming does not apply to custom nodes. You need to style them separately.