eureka VS Elm

Here's an example of building a well-structured, maintainable web-site using JavaScript, HTML and CSS: https://github.com/wisercoder/eureka/tree/master/webapp/Clie...

It doesn't use React (imagine the horror!), instead it uses two tine 500-line libs.

> a literal 5-20x productivity boost

Not really. See a better way here: https://github.com/wisercoder/eureka

I'm not quite seeing React being used, just JSX though? All the view and state updating is being done manually, but it looks fairly well-organised. There are small optimisations like debouncing onInput with a timeout (avoiding rapid re-rendering for every character typed): https://github.com/wisercoder/eureka/blob/master/webapp/Clie...

React works well for simple, non-interactive components. Complex, interactive components are going to have state. Stateful components don't work so well in React. If you want to update props in a stateful component, the recommendation is to replace the component entirely by changing its key. At the point all of the benefits of React (preservation of selection, caret position, scroll position etc.) vanish. You might as well use vanilla js instead of React.

What does using Vanilla JS look like? Here's an example: https://github.com/wisercoder/eureka It uses two tiny 500-line libs. It uses TSX files, just like React. It has components, just like React. It doesn't have incremental screen update, but neither does React, if your components are interactive and stateful.

Elm [1] is based on a similar idea. Build your app from pure functions that return HTML tags.

[1] https://elm-lang.org/

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/).

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.

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.

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.

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/