I am a big fan of DYI, but up to a certain degree. "Compile" was a poor choice of wording on my part :). Already used it on some production projects.

But even a 2MB JS app doesn't sound so bad when it is literally competing with a 200MB mobile app, and (let's say) you're developing a B2B app where everyone is on high power and high bandwidth devices anyway. This is basically v1 though, so it's a bit different. Otherwise you risk fracturing the ecosystem with framework-specific a11y requirements.

Conversely, there are sites that operate at massive scale that benefit from constructs beyond someones blog site. I honestly don't see the problem with JSX. in the mean time, market to the usecase svelte wins hands down. So an average reader may come to the post not because they know and care about Svelte, but because the link being on their favourite aggregator lent it credence as something worth reading. Path to the node executable you would like to use to run the language server. And I'm betting many companies and recruiters have never even heard of Svelte. Just the same old dynamic script loading we’ve been doing for a while as long as the library supports it. To me it’s worse. What about "Faster web apps with less code?". Eslint already warns you about issues like this, and is framework-agnostic. Vue is in my opinion the best solution in the list. Most of the discussions I could find on the topic before writing that post suggested that the error rate per thousand lines of code is surprisingly constant across languages, which suggests that more characters typed does result in more bugs. -1 = default port is used.

You get too complex, use a library for a App. So in the case of two-way data binding, if I'm trying to trace how a certain value was be modified, data flow in the opposite direction might count as "noise", in terms of extra cognitive load. blogpost timing also doesnt matter. Again, I'd have to try it to get a proper feel for it, so I'm looking forward to doing that. You can use it with jsx, you can use it with webcomponents if you want. The idea was to use the reactivity models to expose an API to add todos, remove todos, change todo status and reactively log changes after each action. The whole point is that there is even less magic than react, vue etc. I am using Angular for building SPA's and I am using Angular (Universal Prerender) for building my static sites, am I guilty? If a larger runtime is ultimately unavoidable there is a reasonable chance at least that it is not all necessary at the onset. Your code is in HTML in most cases. react; solid-js; svelte; vue; Stats.

The thing is for all the benefits in size at a certain point as your app grows you will likely include most of the bundle.

So it really depends on what you need. Is the frustration meter shown in the talk video part of that original benchmark? I hope this thread will be helpful to someone who's wondering why we're continuing work on that approach: Yes, the release I've been waiting for. Well, duh, right? On a side note, it's troubling to see how "write once, ship anywhere" development is increasing non-performant apps on mobile & desktop. Default: true, Enable hover info for HTML. I understand the reason behind. It takes a function returning the derived value, and any getter function called in the function is marked as a dependency. It opts for splitting create/update paths as a means to optimize.

svelte-check tool does this to validate Svelte's templates for example.

Default: true, Enable code actions for Svelte.

h1 = element("h1"); Changing your application to an entire new framework is not always worth it, and is greatly difficult. First-load times are paramount since users may bounce and/or their limited data/power/CPU may deprive them of important information (see Alex Russell for math on a reasonable baseline but let's say you definitely want <200kb in the critical path). Most prominently, look at the first main value proposition on its website: Funny: problems I think are important are "ship less code" and "read less code" (and perhaps "require reading less code to understand what's going on"). I'll show its usage with React, but keep in mind it can be used with anything, even vanilla JS. Yes it makes it easier for us to reason about, but performance should be able to scale without hacks. Highly recommended. 1. The Components are just function calls and every part of the lifecycle is a reactive computation. Re: two-way binding, the data flow is inherently confusing whether you use imperative or declarative logic. It would be nice to see a size comparison of the two.

From what I understand, Svelte sidesteps the VDOM and outputs the smallest amount of code to achieve the desired level of reactivity which might be the better abstraction. This!

Namely, it can react to changes in state. To define the initial state we use the createSlice function and pass it the initialState along with some reducers and the function returns the Redux store.

One day soon, hopefully! As you can see it isn’t particularly close. If something is inherently complicated making it easy requires adding a level of complexity.

Libraries like attodom and hyperapp come to mind both using HyperScript like syntax allowing for easy explicit importing of just the functions used. Actually Angular does this with Zones which is a different Reactivity system. So presenting things the way React does out the door might not suit everyone and that might be sufficient to give libraries specializations. I'd like to clarify Solid is completely reactive. Great work. This was the web's original usecase - displaying information - and it is what HTML/CSS/Browsers are great at.

Default: true, Enable color picker for CSS. It's simple, composable, fast, easy to get started with and just makes sense.

I want code that has a lot of visibility, meaningful stack traces and the debugger stopping in relevant places.

You limit the svelte usage to only web pages. For what it's worth, Create React App is bundled with eslint-plugin-jsx-a11y which will give you the same warning.

But with this distinction I see it clearer now, I will reach for Svelte anytime I don't need to build a complex, interactive app and don't want to use just HTML + CSS .

Tells computers what to do, and sometimes they even do it. Path can be either relative to your workspace root or absolute. "Compile" was a poor choice of wording on my part :). Magical disappearing makes it sound like a cheap parlor trick.

This is a nice constraint that makes it easy to understand the mapping between Svelte files and pages. Default: true, Enable selection range for Svelte.

Or maybe even in your production. I even think Svelte is overkill for marketing sites. The code you write in Svelte is reactive/declarative, emitted code is regular imperative JS. No other ecosystem has projects like Adobe and Devon Govett's React Aria that has extensively thought through and tested for WAI-ARIA so you don't have to. But author abandoned it. If we want to subscribe only to parts of the state, we have to implement additional logic to check if that part of the state has changed.

I have not used Go, or even looked at it, so I can't really give a well-reasoned comment about it. react prioritizes correctness over performance. Allow me to try and convince you of its importance :), I actually read that just before this comment :), > more characters typed does not necessarily directly result in more bugs, as far as I know. Solid provides an explicit syntax for batching actions, and its setState helper can take lists of changes all applied at the same time. Hell to the no. I can only speak to Webpack, and this might already be possible with Rollup. Compare npm package download statistics over time: react vs solid js vs svelte vs vue. Redux has been around for some time now, and it's widely used. I haven't used it yet but I really like the idea of Svelte, just how I really enjoy using Preact over React for certain projects. Head management?

Might mess around today. > focusing on a compiler versus a full on framework. React deals with this through a semi-functional mindset. Once again I am talking about true marketing sites. Very happy for this. Use whatever makes your heart beat. Elder.js is interesting. In the scheme of things Svelte has good performance compared to other popular libraries but it is not class leading by any means. Templates let you quickly answer FAQs or store snippets for re-use. For performance benchmarks I’ve used the JS Frameworks Benchmark. Styles are bootstrap etc... One test measures the kilobyte weight of all assets sent over the wire. Any variable referenced on the lines marked with $: is marked as a dependency of the derived variable.

Bottom Line: Given Solid’s performance being so close to painfully hand optimized Vanilla JavaScript code, it is safe to say raw performance is not a bottleneck for this approach.

svelte. I'm fairly confident this direction is viable given Marko has been doing this at eBay since 2013. Who it is viable for is a different question. Because of code splitting, your app will load faster. One avenue I'm currently exploring is whether the same declarative/compiled model can be used as a wrapper around WebGL APIs, though it's very early days. Default: true, Enable completions for TypeScript. Objects were going to be the be-all and end-all after structural programming. If you STILL needed to ship features in React, you could mount it atop of a Svelte app if you wished. Default: true, Enable rename functionality for JS/TS variables inside Svelte files. The reason this is so hard to do for React is precisely because Javascript is a huge target with a ton of bizarre quirks and edge cases. I didn't even think it was an English word before I watched Rich's (great) talk. You're totally right. But if you went vanilla JS, the bundle for sure would be smaller.

If you have time I'd strongly encourage you to watch the video shown in the post. It's decent but again optimized libraries are still more performant. With Routify you have to start your app from Routify, so to say.

What if you could opt in to pieces of the framework in different chunks?

[0] https://anderspitman.net/apps/hardware-bubblesort/, A frequent argument for the use of vdom has been that it reduces Dom trashing. It's a little thing, but it's appreciated. Svelte’s store mechanism uses a different syntax to handle this shortcoming. It might well be the case that it is far less problematic when e.g. If you prefer, you certainly can do the `on:change={handler}` thing instead, but as I argue in the post I think that's less effective at capturing the intent of your code (and gives bugs more places to hide). I heavily use React in production, however I'm open to new things. I definitely think it's the right approach for reactivity. This is, remarkably, a nuanced enough opinion that it pisses off fans of either of them.

I first learned of Svelt and Rollup (and became your fan) when I asked how you made that great NYT article, The Follower Factory! Some had succeeded at skipping processing overhead but few the same sophistication of shipping less JS in completely automatic isomorphic way. The best and self-defining para from article, (Longer answer: what sort of bugs? It's also worth noting that this approach means there's none of the overhead involved in creating proxies. Wait til you realize that = basically compiles to setState, or that yes, it does actually ship a runtime, or that yes, it actually has a scheduler too.

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