npm: make-error-cause
Make your own nested error types!
sindresorhus/ow
ow - Function argument validation for humans
dfcook/vue-testing-library
vue-testing-library - Attempt at replicating the ultra-low surface area of react-testing-library using vue and @vue/test-utils
bjyoungblood/es6-error
es6-error - Easily-extendable error for use with ES6 classes