![]() ![]() ClojureScript version actually ends up outperforming plain React in some cases.įinally, if you're already using Clojure on the backend, then you get the benefit of code sharing with cljc, and being able to pass data structures between the frontend and backend seamlessly. Nowadays, shadow-cljs solves that problem entirely.ĬlojureScript with re-frame also does extremely well in benchmark comparisons in terms of code size, performance, and bundle size. The only pain point I've experienced was integration with NPM modules. All of this is very important for producing small bundles that you're going to be sending to the client. The compiler automatically prunes the code down to function usage, it does a very good job with minification, and you also can trivially do code splitting. ![]() Hot loading code just works because the language is designed around immutability as the default, and you get a REPL driven workflow during development. You're either stuck using legacy patterns and libraries, or you have to keep chasing whatever the approach du jour happens to be.ĬlojureScript tooling is also far more robust in my experience. This kind of churn has a direct business cost associated with it. If you started a TypeScript app with React 5 years ago it will likely be legacy today. Nowadays, React best practices are starting to closely resemble what Reagent and re-frame have been doing from the start. We've seen lots of patterns appear like Redux, Flux, hooks, and so on. On the other hand, React itself has seen a ton of churn during that time. The API has stayed the same, and there haven't been any breaking changes. My team has been using re-frame for nearly half a decade now, and we just update the version now and then to get improvements. The ecosystem around ClojureScript is also much more stable. Meanwhile, ClojureScript is a fundamentally better language that doesn't have all the baggage of Js. ![]() To run a ClojureScript app on Node.js, you must first have a Node.js runtime installed via either of the two methods described above. TypeScript inherits pretty much all the problems inherent in Js, and adding a type system on top of that only does so much. An application of this type can then be run with a JVM-based server such as Jetty, or it can be run on Node.js itself. SearchInputView : Signal.I see absolutely no advantage in using TypeScript over ClojureScript myself. (List.map (\m -> itemView address m model) model.filteredModules) (3) View : Signal.Address Action -> Model -> Html (1) Is actually triggered by our ClojureScript backend. To populate the Module browser ui with modules the Refresh action is called. This is achived through the notifySelect helper function.ĬlickSelect is similar to Select but handles when the user uses the mouse to select a module.Ĭlose - When the user presses the escape key, the module browser should close. Again to make that happen we need to communicate Ultimately result in opening the Elm Module file. The Select action is triggered when the users presses Enter. The notif圜hangeSelection function call results in an effect that allows us to communicate with the ClojureScript part Prev and Next selects/highlights the next/previous module given the currently selected one. The model is NOT mutated, rather we return a new updated model.Įlm keeps track of our global model state ! Module to the first in the filtered results. To filter modules with names starting with the given search string. Whenever the user changes the search string input the Filter action is called. It’s handy when initializing the app and also for mapping effects to when there areĮffects that we don’t care about in the context of this update function We treat an effect like a value in the application, the Elm runtime takes care of actually executing it. ![]() Effects are basically things that have side-effects (http/ajax, interacting with the browser etc). The update function takes an action and the current model as parameters and returnsĪ tuple of an (possibly) updated model and an Effect. If you’re not sure what union type means, think of it as a Enum on stereoids. The actions that causes changes to the model is represented by a Union Type called Action. ![]()
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