JS Warnings when clicking the Publish button

[afercia]

Describe the bug
Not sure this is already tracked. If it's a known issue, of course do feel free to close.

• create a post
• press the Publish button and observe your browser's dev tools console

I'm getting the following warnings:

Warning: React does not recognize the `postType` prop on a DOM element. 
Warning: React does not recognize the `hasPublishAction` prop on a DOM element.
Warning: React does not recognize the `isPublished` prop on a DOM element.
Warning: React does not recognize the `isSaving` prop on a DOM element.
Warning: React does not recognize the `isDirty` prop on a DOM element.

Seems to me they come from the post publish panel:

gutenberg/packages/editor/src/components/post-publish-panel/index.js

Line 68 in a8fe865

<div className="editor-post-publish-panel" { ...additionalProps }>

Where { ...additionalProps } are passed to a <div> element. Dumping the passed props, they're:

aria-label: "Editor publish"
hasPublishAction: [{…}]
isDirty: false
isPublished: false
isSaving: undefined
postType: "post"
role: "region"
tabIndex: -1

where I guess only aria-label, role, and tabIndex should be passed because they make this div a navigable region.

[jhhazelaar]

Same here. Version 4.0.0

[desrosj]

This does not happen for me using WordPress 5.0 with the plugin off. It is happening for me using WordPress 4.9.8 and 5.0 with the plugin activated, though.

[afercia]

@desrosj seems this has been fixed a day ago? See 09a9f8e#diff-d9f39303d3d23634ea1f3022808910c5R58

/Cc @nosolosw

[oandregal]

I've noticed that as well and removed most of them in a PR yesterday that will be released with 4.2. #11093 fixes the one remaining.