2 CSS in, err... JS) I gotta say I do agree with problems of CSS encapsulation in Shadow DOM. Example a little bit outdated, but the main idea doesn't change. i.e because styles are global in scope. Shadow DOM is my favorite part, despite its problems. When we used Web Components we skipped the shadow DOM because of some issues with forms that cross the light and shadow barrier and the weight of the shadow DOM polyfill. Web Dev Using Shadow Dom, you can attach a separate DOM tree which is hidden and encapsulated to any element. Frameworks don't generally suffer from this issue. I agree with some of the points here about WC implementation but I don’t agree with the presentation. They're solved with tools that are not part of an official specification which serves the entire web community. You don't have to write components this way, but it is nice and complete to be consistent with standard elements. React aims on interoperability with Shadow DOM but does not intend to use shadow DOM as a foundational layer for its component model: In word of Sebastian Markbage: We’re not going to use … Or consider a simple element that encapsulates all the logic for constructing a Twitter web intent URL. I'd give heresy a chance too, it works out of the box on client/SSR and since it needs zero real DOM to work, it might easily end up on NativeScript or similar too , The article keeps saying Stencil compiles to Web Components, that's what I meant . The Shadow DOM is a scoped sub-tree of DOM. There’s a separate movable element inside of the input element? Built on Forem — the open source software that powers DEV and other inclusive communities. You'll see nothing rendered. If a big Browser vendor who owns the biggest search engine, has one of the largest resources and blogs to push topics, pushes it, people will jump on that. Neither of these cases refute your points but they are common examples where Web Components shine. I've said that svelte addresses solutions be it in it's own way. ` 'Enable' : 'Disable' }} comments, {{ articles[0].isLimited ? The concept of DOMs is one of the foundations of the web and interfaces, and it’s deeply intertwined with JavaScript. It’s true browsers should implement custom elements uniformly and they don’t, including custom elements v1. For Example you can set the font of the entire web site at one place. The shadow boundary is the place where the shadow DOM starts and ends. A simple example close to me - how often you're changing your TVs? var shadow = this.attachShadow({mode: 'open'}); Attaching shadow dom to an element in the DOM tree Otherwise why do we have so many languages? Things like Preact or AppRun includes whole components system but their weight comparable. There are iterations of React, Angular, etc. Now, please, please, please do not compare them with those things that hide my flaws. The class="svelte-1jnfxx" is what enables encapsulated styles without Shadow DOM. Yet we're adding new features to the platform just to bring web components to parity with what we can already do in userland. Not so often than your phone, right? They allow developers to write code and styles for a part of a webpage in isolation without conflicting with rules that affect the rest of the page styles. I've been there already with hyperHTML and viperHTML, one of the fastest Hacker News PWAs, if not the fastest, is in viperHTML Isn't the push for Web Components mainly coming from one big browser vendor as some sort of "owning the web", as now developers moved on to non-Google tooling ? They are as follows: Let's try to understand it using an example. If the constraint is "you don't use a React-like library on top" I think you'll find there's plenty of things that are very hard to do with an imperative abstraction like vanilla WC APIs. Your comment to back and forth suggests a very low level of interest in actually being open to figuring out how the thing really works so you might reconsider. Still I don't mind that it is there, and I'm sure it will be useful in some cases. The shadow dom is part of the new web components standard. It was fun to be able to create separate, lightweight components that could upgrade pieces of different applications without taking on the responsibility of rewriting too much at a time. Web components don't. But it's hard to overstate what an awkward interface it is for building interactive applications. Then: 1 is not true. All these WCs based solutions just solve WCs problems, so seems there're just tons of these problems probably. It sucks and I know. I believe you missed my point about TVs. With JavaScript enabled, it progressively enhances — rather than opening a new tab, it opens a small popup window instead. the list of interesting web things that FullStory can record, "Excellent, this blog post answered my question about whether FullStory supports Shadow DOM and I'm ready to move on with my day" or, "I have absolutely no clue what you're talking about, Joel. For starters, it stands for Document Object Model. If you're using a library for defining and updating your web components declaratively, you're not following a conceptually different approach from using React. Consider using a well designed and implemented component rather than a poorly implemented or designed component. It uses tags to define elements and uses words that are human-readable. You can change the style of the contents of shadow dom. Therefore, in ViewEncapsulation.None, the style gets moved to the DOM's head section and is not scoped to the component. We’ve all heard of the DOM at some point. You can literally do this: No attribute changed, but it will behave as though it did. Hence, the application that runs in browsers does not support a Shadow DOM also and styles are scoped to the component as well. I hope posts like this can help change the atmosphere of web development and help us build something better. People said this about IE 5 and IE 6 and when was the last time you supported IE 8? Saying "you can do everything with WCs that you can do in React" is double edged.

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