Documentation
Documentation
Learn how to use CodeSandboxEdit this pageConfiguration
You can configure sandboxes and templates with configuration files.
Configuration Files
There are some advanced use cases where you might need more control over a sandbox or template. That's why we support configuration files. Every template on CodeSandbox has a list of configuration files it supports. You can see the supported files under Configuration Files from the left-hand activity bar in the editor.
Configuration UI
Some configuration files can be configured using a UI. This UI will generate a configuration file based on its state.
Sandbox Configuration
A sandbox can be configured too, you can do this with sandbox.config.json. We
support these options:
| Option | Description | Possible Values | Default Value |
|---|---|---|---|
infiniteLoopProtection |
Whether we should throw an error if we detect an infinite loop | true / false |
true |
hardReloadOnChange |
Whether we should refresh the sandbox page on every change, good for sandboxes with global state | true / false |
false |
template |
Which sandbox template to use | see here | smart detection, w/ fallback to "create-react-app" |
view |
Which view to show first in the preview | Client: "browser" / "console" / "problems" / "tests"Container: "browser" / "console" / "problems" / "terminal" |
"browser" |
disableLogging |
Whether we should disable in-browser logging and have all logs created by the sandbox go to the browser console | true / false |
false |
container |
The container object contains the port, start script and Node.js major version, for example: "container": { "port": 3212, "startScript": "custom", "node": "14" } |
||
port |
The main port which the browser window listens to | 1024 - 65535 | First opened port inside the container. |
startScript |
Explicitly specify the start script used in a container sandbox, overriding the default value | A String matching a script name defined under "scripts" in package.json |
"dev" / "develop" / "serve" / "start" |
node |
The Node.js major version to use inside the container. The exact versions used are as follows:"10": 10.23.0"12": 12.20.0"14": 14.15.1 |
"10" / "12" / "14" |
"10" |