Topic: React MDBTabContent Component - Legacy context API has been detected within a strict-mode tree.

lpchwebservices free asked 4 years ago


Expected behavior components/pro/tabs page should work without errors in strict mode.

Actual behavior

The React sample app with the download gives the following error in strict mode 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: a, n

Learn more about this warning here: https://fb.me/react-legacy-context in n (at TabsPage.js:163) in div (created by Ve) in Ve (at sectionContainer.js:38) in SectionContainer (at TabsPage.js:127) in div (created by Ae) in Ae (at TabsPage.js:126) in div (created by $t) in $t (at TabsPage.js:125) in div (created by Ve) in Ve (at TabsPage.js:124) in div (created by Ve) in Ve (at TabsPage.js:119) in TabsPage (created by Context.Consumer) in Route (at Routes.js:228) in Switch (at Routes.js:137) in Routes (at App.js:205) in main (at App.js:204) in div (at App.js:47) in Router (created by BrowserRouter) in BrowserRouter (at App.js:46) in App (at src/index.js:15) in StrictMode (at src/index.js:14) Resources (screenshots, code snippets etc.) index.js in mdb-react-pro sample application was modified as follows

import React from "react"; import ReactDOM from "react-dom"; import "@fortawesome/fontawesome-free/css/all.min.css"; import "bootstrap-css-only/css/bootstrap.min.css"; import "mdbreact/dist/css/mdb.css"; import "./index.css"; import App from "./App";

import registerServiceWorker from "./registerServiceWorker";

//ReactDOM.render( , document.getElementById('root'));

ReactDOM.render( , document.getElementById("root") ); registerServiceWorker();


Rasul Akhmedkhanov free answered 4 years ago


![ "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: n, r"

React version - 16.13.1, mdbreact - 4.25.6 ]1

enter image description here


Piotr Glejzer staff commented 4 years ago

It's just a warning. We will remove "Legacy Context" soon. If you remove React.StrictMode from your App.js and these warnings will not show.


Rasul Akhmedkhanov free commented 4 years ago

Yes, I'm already did it. Thanks for answer.


Rasul Akhmedkhanov free answered 4 years ago


Same issue reported in my console, when I used the component: https://mdbootstrap.com/docs/react/navigation/navbar/


Jakub Chmura staff answered 4 years ago


Hi @lpchwebservices,

Thanks for the founded bug.

We try to fix it as soon as possible.

Best, Kuba



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Status

Answered

Specification of the issue

  • ForumUser: Free
  • Premium support: No
  • Technology: MDB React
  • MDB Version: 4.25.5
  • Device: Desktop
  • Browser: Chrome
  • OS: Windows
  • Provided sample code: No
  • Provided link: Yes