Custom inspection API?

[mbostock]

From observablehq/notebook#210:

It’d be need to have an equivalent to Node’s custom util.inspect hook.

[tmcw]

• The Chrome equivalent, which has a third-party integration with immutable.
• Code that tests existence of formatters and runs them: https://cs.chromium.org/chromium/src/v8/src/inspector/injected-script-source.js?q=devtoolsFormatters&sq=package:chromium&dr=C&l=812

I think implementing the Chrome API is the best approach here: we'd be able to take advantage of existing formatters, and a 'userland' implementation is definitely possible, though nobody's done it yet. Would want notebook-runtime tests to be in place before writing this.

[mbostock]

Moved to observablehq/inspector#14.