reagent
Elm
reagent | Elm | |
---|---|---|
41 | 198 | |
4,715 | 7,451 | |
0.1% | 0.2% | |
1.1 | 5.4 | |
5 months ago | about 2 months ago | |
Clojure | Haskell | |
MIT License | BSD 3-clause "New" or "Revised" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
reagent
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Ludic: New framework for Python with seamless Htmx support
Generating `HTML` from lisps has poisoned any other approach for me, see for example https://www.neilvandyke.org/racket/html-writing/, https://reagent-project.github.io/, and https://edicl.github.io/cl-who/
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Produce HTML from S-Expressions
Hiccup syntax for Clojure uses hash maps (curly braces) for attrs, e.g. `{:style {:background "red" :margin "1em"}`
See Reagent which uses Hiccup synta: https://reagent-project.github.io/
(defn simple-component []
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A History of Clojure (2020) [pdf]
* Single-Page App: shadow-cljs for the build concerns (https://github.com/thheller/shadow-cljs), Reagent with Re-frame for complex/large app (https://reagent-project.github.io and https://github.com/day8/re-frame). Even if we now prefer using HTMX (https://htmx.org) and server-side rendering (Hiccup way of manipulating HTML is just amazing, https://github.com/weavejester/hiccup).
- Leaving Clojure - Feedback for those that care
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Clojure is a product design tool
The API documentation lists the most commonly and rarely used parts before going into detail and there are many usage examples.
Reagent has a nice intro tutorial (classic todo-app): http://reagent-project.github.io and many other helpful tutorials and resources for beginners: https://cljdoc.org/d/reagent/reagent/1.2.0/doc/documentation...
However, since Reagent is still stuck with class-components for more complex behavior and relies on Hiccup, which is nice but has a performance cost compared to pure React, I am unsure about its future. Like some others in the Clojure community, I have moved to thin React wrappers like Helix and use Refx to integrate those with re-frame. It may be a bit confusing right now for beginners since there is no “golden path”.
Also, unfortunately, many smaller libraries are poorly documented and it seems like it is expected from the developer to dig into the source code to find out what’s going on.
What I found the most difficult as a beginner was how to setup a project in ClojureScript in the first place, like all the configuration in shadow-cljs, how it interacts with deps.edn, how it integrates with npm, the REPL, etc. But dev/build config has always been a weak spot for me, so it might be just that.
Overall, I still very much enjoy working with Clojure(Script), more than in any other language. Anyone who likes Lisps and functional programming should give it a try (and be sure to watch Rich Hickeys amazing talks!).
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Ask HN: How can a BE/infra developer handle the FE side of personal projects?
have you tried cljs and reagent? it’s a different vibe.
my bootstrap: https://github.com/nathants/aws-gocljs
the project: https://reagent-project.github.io/
- What are the enduring innovations of Lisp? (2022)
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Building a website like it's 1999... in 2022
Clojure people have been doing this for a decade or so. It’s really so much better to work with. All started with Hiccup and when React came along you got Reagent and many more developments building on the idea.
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React.dev
> But Reagent supports functional components as well, with hooks and all.
I addressed this already: while reagent is able to emit function components, there is a performance penalty to this.[1]
> I also very much like Hiccup, and so do many of us, because code is data and data is code, and Helix has decided not to support that.
Hiccup is convenient to write, but it is a constant run-time cost and a significant storage cost given that you have to store long series of constructors to cljs.core.PersistentVector in your bundle, have the JS runtime actually construct the vector, then pass it through a Hiccup interpreter to finally produce DOM nodes and throw away the persistent vector, only to repeat this entire process again on re-render.[2]
> Helix has decided not to support that.
That is simply not true. From the Helix documentation[2],
> If you want to use libraries like sablono, hicada or even hx hiccup parser, you can easily add that by creating a custom macro.
These are all Hiccup interpreters you can readily use.
IME there is very little difference between using the $ macro in Helix and writing Hiccup. I do not really miss Hiccup when I use Helix, and you still have data as code ;)
While this is from an unrelated project, there are benchmarks[3] done against Reagent that demonstrate the sheer overhead it has. In practice it is not a big problem if you rarely trigger a re-render, but otherwise it is a non-trivial cost, and if you want to use modern React features (like Suspense), there is a lot of r/as-element mingling going on, converting cases, etc. that simply make Reagent feel more tedious to use than Helix.
Also, the newer UIx2, which largely borrows from Helix, is "3.2x faster than Reagent" according to one of the contributors.[4]
I think it'd be worthwhile to benchmark all of these libraries against each other and record the data in one place. Maybe I'll get around to doing it this weekend :)
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[1] https://github.com/reagent-project/reagent/blob/master/doc/R...
[2] https://github.com/lilactown/helix/blob/master/docs/faq.md#w...
[3] https://github.com/roman01la/uix#benchmarks
[4] https://github.com/pitch-io/uix/pull/12
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React is a fractal of bad design
Reagent is peak React. All the good stuff without any of the hook and readability problems the article describes.
No affiliation, happy user for years.
https://github.com/reagent-project/reagent
Elm
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Ludic: New framework for Python with seamless Htmx support
Elm [1] is based on a similar idea. Build your app from pure functions that return HTML tags.
[1] https://elm-lang.org/
- Learning Elm by porting a medium-sized web front end from React (2019)
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Can you make your own JavaScript by implementing ECMAScript standard?
You also wouldn't really be creating your own new programing language. You would be creating something that can run JavaScript by following JavaScript standards and syntax. You might be able to add some non-standard features of your own on top of those standards, or include your own standard library of helpers or utilities, but you can't completely make a new or alternative language and then load it in the browser (or at least not by reimplementing ECMAScript standards... you actually can make your own language that runs within any Javascript enviroment, if you provide an interpreter or compiler that transforms it into valid JS. Some people have done something like this, eg Elm: https://elm-lang.org/).
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What is the best way to present the user the results of Haskell computations?
You should at least have a look at https://elm-lang.org/ it is a pure functional language like Haskell (although with fewer fancy syntax/type classes) but it has some lovely libraries for visualisation and even with plain elm (+ elm-ui) doing string transformations can be easily done.
- Course using F#: Write your own tiny programming system(s)
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Building React Components Using Unions in TypeScript
I get it. However, the whole point of using Unions to narrow your types, ensure only a set of possible scenarios can occur, and only access data of a particular union when it’s safe to do so. That’s some of what pattern matching can provide, and 100% of what using switch statements in TypeScript with their Discriminated Unions can provide. Yes, it’s not 100% exhaustive, but TypeScript is not soundly typed, and even Elm which is still has the same issue TypeScript does: You’re running in JavaScript where anything is possible. So it’s good enough to build with and much better than what you had.
- What's the state of the Elm repo? · Issue #2308 · elm/compiler
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How to render a basic calendar UI in Elm
The beauty of a language like Elm (and other lambda-calculus / functional programming inspired languages) is that there's very little transformation involved in going from an idea to code. And that seems to have a big impact on getting things done.
- Como desenvolvi um backend web em Clojure
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Is it possible to write games like Pac-Man in a functional language?
I think the most fun and approachable way for beginners to build games with functional programming is with Elm [1].
See a few (small, demo) games built by the community in [2] .
Notice Elm has abandoned the FRP approach in favor of Model-View-Update [3].
[1] https://elm-lang.org/
What are some alternatives?
helix - A simple, easy to use library for React development in ClojureScript.
rescript-compiler - The compiler for ReScript.
re-frame - A ClojureScript framework for building user interfaces, leveraging React
haskelm - Haskell to Elm translation using Template Haskell. Contains both a library and executable.
shadow-cljs - ClojureScript compilation made easy
purescript - A strongly-typed language that compiles to JavaScript
fulcro-rad-demo - A demo for Fulcro RAD using either SQL or Datomic databases.
yew - Rust / Wasm framework for creating reliable and efficient web applications
storybook.js-with-shadow-cljs
idris - A Dependently Typed Functional Programming Language
hyperscript - Create HyperText with JavaScript.
reflex - Interactive programs without callbacks or side-effects. Functional Reactive Programming (FRP) uses composable events and time-varying values to describe interactive systems as pure functions. Just like other pure functional code, functional reactive code is easier to get right on the first try, maintain, and reuse.