single-spa VS swup

Single-SPA Framework - One of the most popular choices. It has a large community behind it and offers robust routing and lifecycle management for microapps. Ref - https://single-spa.js.org/

Joel Denning is the visionary behind single-spa, boasting profound insights into the true mechanics of the web and is, in my view, a pioneer in micro frontend architecture. I highly recommend checking the single-spa website and his YouTube channel. While the videos might appear dated at first glance, rest assured, Joel is ahead of his time, and the content remains incredibly relevant today.

You got me curious and I found that single spa is something new to me - if I read https://github.com/single-spa/single-spa then I reckon you can use Svelte(Kit) in such framework - like you can use angular etc

I’ve actually done that “web components as the interoperability layer”!

It was this old angular 1.8 app with new features being written in angular-hybrid-ized angular 8. Ripping out angular-hybrid and separating the angular 1.8 routes from the modern angular routes was difficult, but now they were totally separate.

The only thing linking them together was an object with some RXJS streams in it for state, and a little in-house wrapper “app” who just loaded one component or another depending on the URL and a hash of routes for config. (I’d probably use SingleSPA [1] now. Same thing really.)

We could deploy them separately since the build just ends up being another JS file somewhere that just gets included with a script tag at runtime. No version bumping! No big mega build!

We started replacing the remaining “old” routes 1 by 1 with a “new” counter part. That was the easiest part, and went at a pace devs were comfortable with (fast enough) and business folk could tolerate. (modular enough to not HAVE to be done all at once)

Last I checked, the angular 1.8 stuff is gone years ago. :)

[1] https://single-spa.js.org/

Module Federation is not the unique solution, for example single-spa

You may want to look into using single-spa to run Vue 2 and Vue 3 side by side while you're migrating. Once your app is fully converted, you can stop using single-spa

Single-SPA and module federation are potent tools for building scalable micro-frontends. Single-spa provides a framework for building a modular front-end application. It allows lazy loading of micro-frontends, which helps improve the application's performance. In contrast, module federation enables communication and dependency sharing between different micro-frontends. It reduces code duplication, which can help with scaling an application.

Since micro-frontend allows us to develop applications individually, this also means you can use different frameworks and libraries together to develop each section of this application. Of course, this will have some advantages and disadvantages. If you are using different technologies to serve different parts of the application, it won't be so easy to move developers within teams. However, the door is open, and if you want to do something like that, you could use something like Single SPA, or some other, to help you organize and connect the different technologies into a larger application.

https://swup.js.org/ single-page-app but with minimal framework, still along for the feel of an SPA

Sure, you can use any number of JS-avoidance libraries. I'm a fan of Turbo, and there's also htmx, Unpoly, Alpine, hyperscript, swup, barba.js, and probably others.

Swup is this nice page transition library I found recently : https://swup.js.org/

2. The newly released fragment-plugin [3] that provides a declarative API for dynamically replacing containers based on rules

I can now finally build websites that tick all three boxes:

1. Visually impressive, fun, and snappy by using swup's first-class support for animations[4], cache[5], and preload capacities[6], enhanced with fragment visits as seen on the demo site.

2. Accessible by being able to serve server-rendered semantic markup that will fully work even with JavaScript disabled (try it out on the demo site!). On top of that, swup's a11y plugin[7] will automatically announce page visits to assistive technologies and will focus the new `

` element after each visit.

3. Because now all I need for my fancy frontend is a bit of progressive JavaScript, I can choose whatever tool I like on the server, keeping complexity low and maintainability high. I can use SSGs like eleventy or Astro (the demo site is built using Astro!), I can use any CMS like WordPress or ProcessWire, or a framework like Laravel. And I don't have to maintain an additional node server for SSG!

And all it took was 20 years! ;)

[0] https://github.com/swup/swup

So what are View Transitions good for? In short, they allow adding animated page transitions. Although we already have several standard options to animate stuff on web pages (CSS Transitions, CSS Animations or the Web Animations API) and countless more options in particular JavaScript frameworks and libraries (Framer Motion for React, Vue Transitions, Svelte Transitions, Swup, Barba.js or Animate.css to name just a few), the web still lacks a generic, standards-based and easy-to-use solution to animate transitions between pages or during DOM updates. At least that’s what Google engineers say and I tend to agree with them.

Is https://turbo.hotwired.dev/ my replacement? Or Swup.js?

I've used https://swup.js.org/. Simple to setup with one of the built in/contributed themes, haven't tried building a custom theme however. Also has a lot of good plugins for eg. accessibility. I used it in combination with Astro so a static site with a separate html file for each page.

Like Gatsby or Next, Astro does not have any client side navigation. So each link click triggers a full page reload. Astro recommends to use Swup as mentioned here. Turbo is also another option though the team does not recommend it. I'm currently using Swup which I'll probably switch from or completely remove it as I have added TOC to MDX and clicking on a title is not redirecting the page to that particular section.