Question 1

Is Rum still maintained in 2024?

Accepted Answer

No, Rum is in support mode with no active development; the maintainer is open to new maintainers, but users should not expect updates or new features. This is stated in a caution note at the top of the README.

Question 2

Rum vs Reagent: which is better for ClojureScript?

Accepted Answer

Rum is simpler and more flexible, with no enforced state model and native server-side rendering, while Reagent is more opinionated with reactive atoms. Choose Rum for minimalism and control, Reagent for a more integrated approach.

Question 3

How to do server-side rendering with Rum?

Accepted Answer

In Clojure, use rum/render-html to generate static HTML strings, and on the client, mount the same component with rum/hydrate for hydration. This allows isomorphic rendering without JavaScript on the server, as explained in the server-side rendering section.

Question 4

Can I use React hooks with Rum components?

Accepted Answer

Yes, but only in defc components with optional rum/static mixin; hooks and other mixins cannot be used together in the same component. The README warns that using any other mixin will generate class-based components incompatible with hooks.

Question 5

What are mixins in Rum and how to create one?

Accepted Answer

Mixins are functions that hook into component lifecycle stages like :will-mount or :did-update; you define them as maps with callback functions to modify state or add behavior, as shown in the 'Writing your own mixin' examples.

Question 6

How to optimize performance in Rum apps?

Accepted Answer

Use the rum/static mixin for shouldComponentUpdate-like behavior with immutable data, and ensure Hiccup forms are pre-compiled via Daiquiri to avoid slower runtime interpretation, as noted in the performance section.

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