My screen getting blank when i use mdx live editor.

🐛 Bug Report

Prerequisites

• I’m using the latest version of Docusaurus.
• I have tried the npm run clear or yarn clear command.
• I have tried rm -rf node_modules yarn.lock package-lock.json and re-installing packages.
• I have tried creating a repro with https://new.docusaurus.io
• I have read the console error message carefully (if applicable)

Description

I try to use MDX using livecodeblock , everything is okay until I try to delete all code on the live editor and when i press delete one more time my screen getting blank and my console give me this code : Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.

Have you read the Contributing Guidelines on issues?

Yes

Expected behavior

i can delete my code on the live editor.

Actual behavior

console code : Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.

Your environment

• Public source code: https://github.com/fiqryq/fiqrychoerudin
• Public site URL: localhost / https://fiqrychoerudin.vercel.app/
• Docusaurus version used: 2.0.0-beta.6
• Environment name and version (chrome Version 93.0.4577.63 (Official Build) (x86_64) , Node.js 14.17.6 LTS):
• Operating system and version (Mac OS Big Sur 11.5.2):

Reproducible demo

Use https://new.docusaurus.io to create a CodeSandbox reproducible demo of the bug.

(Paste the link to an example repo, including a docusaurus.config.js, and exact instructions to reproduce the issue.)

[lex111]

@ChristopherHButler thanks, but in your case, the problem with React version mismatch (you use v17, but the latest minor version react-live 2.3.0 rewritten on hooks uses v16). yarn can resolve this automatically, but npm you use doesn’t.

A workaround would be to downgrade React to v16/run app via yarn instead of npm/add webpack alias. But it would be better if we just use the previous version react-live 2.2.0. I created PR for this #5556.

[slorber]

Hey

Merged https://github.com/facebook/docusaurus/pull/5556 so please test and let us know if canary doesn’t fix the problems