Building a Custom Code Editor in React (Monaco + Chakra UI)

Question

I found a guide on creating a React-based code editor using Monaco Editor and Chakra UI:

It covers:

Using @monaco-editor/react for syntax highlighting & autocomplete
Language switcher with Chakra UI
Managing state and editor instance with hooks

Questions:

How do you optimize Monaco’s bundle size?
Tips for adding linting, Prettier, or JSX support?
Best way to handle themes & state?

Would love to see your setups or tricks for making Monaco-based editors more powerful!

Tasadduq Burney · Answer

Hey, Hope you're keeping well. To reduce Monaco’s bundle size in a React app, use dynamic imports with React.lazy and the monaco-editor-webpack-plugin to only include required languages, and lazy-load additional language features on demand. For linting and Prettier, run ESLint and Prettier inside a Web Worker and feed results back via monaco.editor.setModelMarkers to avoid blocking the UI; JSX support requires setting the language mode to typescript with jsx: true in the compiler options. Theme management works well by mapping Chakra UI’s useColorMode values to Monaco via monaco.editor.defineTheme , persisting preferences in local storage or Azure App Service user settings for multi-user scenarios. If integrating into a .NET or ASP.NET Core backend, expose formatting or linting rules through APIs so the editor stays consistent with server-side validation. Thanks and regards, Taz

Building a Custom Code Editor in React (Monaco + Chakra UI)

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