Devcards aims to provide a visual REPL experience for ClojureScript

For large/ambitious cljs apps I'd recommend unit-testing each devcard somehow.

At work we haven't done it and it's a regret - not cool to find an outdated devcard that doesn't work anymore.

(not a flaw in Devcards itself)

In addition: by testing a devcard you also, of course, are implicitly exercising the underlying code.

So instead of writing a test for code X, you can test a devcard using X instead, and kill two birds with one stone.

Especially true if you're doing integration-testing, Selenium-style.

Devcards is great. A good alternative for non-CLJS apps is storybook: https://github.com/storybooks/storybook.

Also see reactcards (devcards for react): https://github.com/steos/reactcards