> is there a way with leiningen to have some dependencies only when building for clojure, and not for clojurescript Yes, profiles.

thanks!

Profiles apply at build time but as far as I know you won't be able to ship a single .cljc jar that only sometimes brings additional dependencies to the classpath. So, if your goal is one distribution then it could be without clojure.data.json and you could mention to your users that it's a required additional dependency for using the library from clojure. Or, just always include it since an inflated classpath during clojurescript builds (not distributions) is probably not very important unless the library is something prone to breaking and also used by the clojurescript build chain / compiler.

I'm using Reagent, and don't want to use other libraries

Do your cells have unique React keys? Usually, the key to solving this in React - and therefore reagent - is to make sure your cells have a unique key, i.e. the stuff you set either in the attr map or via metadata, e.g. ^{:key k} [:td ....] . If every cell has a unique key, then only the cell with changed content needs to be modified. Also, do make sure to make all call all your component functoons with [my-component ...] rather than (my-component ...) .

Keys are the trickiest part of React, IMO. There is unfortunately no one good way to create unique keys; it really depends on your data. Depending on how you data looks you might have to create the uniqueness at the row level instead.

> sparsely rerender Not just for editing - consider using something like https://github.com/bvaughn/react-window

Thanks! Keys solved most of the problem. I had to use keys on all my intermediate functions in order for that to work though.

@U0125K3M73J It looks like you’re incrementing integers as your keys. Note that this will likely introduce subtle bugs if you ever reorder your data or introduce new data points since your some of your keys then no longer identify the same data points. Also, I recommend keeping your browser developer tools open while developing - that would also have notified you of your missing keys.

They did notify me. I was just confused because I thought my keys would automatically propagate through custom components. About the integer keys, i'll keep that in mind if I reorder them

We are doing this here: https://github.com/penpot/penpot/blob/develop/frontend/gulpfile.js#L50

I just transform the index.html when serving it. In the handler it's easy to read the manifest...

Guys, thank you so much!

@U05224H0W Thank you!