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When debugging your code, you can use more than just console.log or attaching the node process to a debugger. You can also use the following methods for debugging.

Note: The following methods are only effective when the instance is running with debugInfo=true.

Using ctx.state.json

To pass a custom object to ctx.state.json for debugging, follow these steps:

  1. Create your custom object.
  2. Assign your object to ctx.state.json.
  3. Access the corresponding route + .debug.json to view your object. For example, if you want to debug the route /furstar/characters/:lang?, you can access the URL: /furstar/characters/en.debug.json

Here's an example of how to use ctx.state.json taken from furstar/index.js

const info = utils.fetchAllCharacters(, base);

ctx.state.json = {

In the example above, we're passing the info object to ctx.state.json, which we can then access using the corresponding route + .debug.json.


In order to quickly test if the description in is correct, you can use the .debug.html file suffix to obtain the HTML of the corresponding entry. The link can be directly opened in the browser to preview the rendering result.

Usage: Access the corresponding route + .{index}.debug.html, where {index} is the item number (starting from 0) in your And the data corresponds to the[index].description information will be returned as route result.