iframe node example works but with error; I fixed it (?)

Initial checklist

[X] I agree to follow the code of conduct
[X] I searched issues and discussions and couldn’t find anything (or linked relevant results below)

Affected packages and versions

core 7.3.5, kit 7.5.5

Link to runnable example

No response

Steps to reproduce

Copy the code from your iframe example, example-iframe-plugin, into a .svelte file (I don't think it matters that I'm using svelte).

Expected behavior

Renders the iframe properly. No errors.

Actual behavior

Renders the iframe properly. But throws error:

Uncaught RangeError: Content hole not allowed in a leaf node spec
    at _DOMSerializer.serializeNodeInner (chunk-NHPDIOUZ.js?v=41b99bdd:3154:15)
    at chunk-NHPDIOUZ.js?v=41b99bdd:3143:28
    at _Fragment.forEach (chunk-NHPDIOUZ.js?v=41b99bdd:366:7)
    at _DOMSerializer.serializeFragment (chunk-NHPDIOUZ.js?v=41b99bdd:3117:14)
    at Plugin.handlePaste (@milkdown_plugin-clipboard.js?v=41b99bdd:117:43)
    at chunk-DE7QC25T.js?v=41b99bdd:12891:43
    at EditorView.someProp (chunk-DE7QC25T.js?v=41b99bdd:14511:43)
    at doPaste (chunk-DE7QC25T.js?v=41b99bdd:12891:12)
    at editHandlers.paste (chunk-DE7QC25T.js?v=41b99bdd:12913:15)
    at view.dom.addEventListener.view.input.eventHandlers.<computed> (chunk-DE7QC25T.js?v=41b99bdd:12396:9)

...which led me to this https://github.com/ueberdosis/tiptap/issues/1321

...and this fix https://github.com/ueberdosis/tiptap/commit/8169eef27c15ccccf59b06970a58931ea137f990

So for milkdown I changed this: toDOM: (node: Node) => ['iframe', {...node.attrs, 'contenteditable': false}], 0], to this toDOM: (node: Node) => ['iframe', {...node.attrs, 'contenteditable': false}],

And the error is gone. Fixed?

(I have not had time to dig into why it works, but it works to stop the error.)

(FYI, in a .svelte file, $ is reserved in the code section, so the imports have to be modified, e.g.,: import { $node as nnode, $inputRule as iinputRule, $remark as rremark } from '@milkdown/kit/utils'; )

Runtime

Chrome

OS

Windows, Linux

Build and bundle tools

Vite

Milkdown / examples