Overlay uses legacy context API through react-transition-group

[tanveersingh926]

While using the Dialog, I am getting below warning in the console.

index.js:1 Warning: Legacy context API has been detected within a strict-mode tree.

The old API will be supported in all 16.x releases, but applications using it should migrate to the new version.

Please update the following components: TransitionGroup

Learn more about this warning here: https://fb.me/react-legacy-context
    in TransitionGroup (created by Blueprint3.Overlay)
    in Blueprint3.Overlay (created by Blueprint3.Dialog)
    in Blueprint3.Dialog (at Dialog.tsx:16)
    in Dialog (at ViewFormulationDialog.tsx:24)
    in ViewFormulationDialog (at SearchResults.tsx:65)
    in SearchResults (at SearchFormulation.tsx:42)
    in div (created by Blueprint3.Card)
    in Blueprint3.Card (at SearchFormulation.tsx:17)
    in SearchFormulation (at Formulation.tsx:21)
    in Formulation (at AppRouter.tsx:20)
    in div (at Navbar.tsx:63)
    in _Navbar (at AppRouter.tsx:19)
    in Route (at AppRouter.tsx:15)
    in Switch (at AppRouter.tsx:14)
    in Router (at AppRouter.tsx:13)
    in AppRouter (at App.tsx:7)
    in App (at src/index.tsx:9)
    in StrictMode (at src/index.tsx:8) 

[adidahiya]

I don't think this will be resolved until the next major version of Blueprint, since react-transition-group 3.0 requires react ^16: https://github.com/reactjs/react-transition-group/blob/master/CHANGELOG.md#300-2019-04-15

The next major version of Blueprint will work with v16 and v17, at which point we can upgrade to the latest react-transition-group.

[tanveersingh926]

Thanks, @adidahiya. Do you have any idea about the release date?

[adidahiya]

No, we don't have a concrete timeline, it's not going to be a priority for us until React 17 is released.

[aymenoppa]

when you'll fix it? is there any workaround except using blueprint CSS

[adidahiya]

I hope to start work on the next major version (Blueprint v4.0) before the end of the year, but no guarantees it will ship before 2021. React 17 isn't even out yet...

[adidahiya]

fixed by #4545, released in 4.0.0-alpha.0

[adidahiya]

Not fixed in v5.0, we still need to migrate to using the nodeRef feature of react-transition-group.

[adidahiya]

Fixed by #6656