You can just use the devcontainers feature in normal local VS Code (https://code.visualstudio.com/docs/devcontainers/containers)

Even the next version of IntelliJ will have partial support for them (https://blog.jetbrains.com/idea/2023/06/intellij-idea-2023-2...)

Also see https://devpod.sh/ which has had quite a lot of exposure on HN recently.

This loads files off your local device, hence the "local development" part of the title.

The extensions might do things with your code (same as with Coder, albeit with a different marketplace) but the code doesn't live in the cloud a la GitHub/VS Codespaces.

Do these allow the IDE to navigate code, ie will an npm install hide away the node_modules inside the container and the IDE doesn't know about it?