Code-coverage using Node.js' build in functionality that's compatible with Istanbul's reporters.

Like nyc, c8 just magically works:

npm i c8 -g
c8 node foo.js

The above example will output coverage metrics for foo.js.

run c8 report to regenerate reports after c8 has already been run.

c8 uses bleeding edge Node.js features, make sure you're running Node.js >= 10.12.0.

A fully functional code coverage solution using only V8's native coverage features and minimal user-land modules, so that we fit these constraints:

• No parsing of JavaScript code.
• No mucking with Node.js' runtime environment.

See the contributing guide here.