[jasode]

>partial renders and / or DOM morphs of server generated HTML responses, eliminating the full-page refresh effect. www.mcmaster.com seems to utilize this to some degree, actually - while yes there are JSON responses, there are what appear to be HTML partial responses as well that are presumably injected on the page.

Uhm... yes?!? The behavior you listed is exactly why I gave you that McMaster example. So I guess I'm a little confused. In any case, your comment matches up with the wikipedia definition of SPA (https://en.wikipedia.org/wiki/Single-page_application):

>A single-page application (SPA) is a web application or website that interacts with the user by dynamically rewriting the current web page with new data from the web server, instead of the default method of a web browser loading entire new pages. The goal is faster transitions that make the website feel more like a native app.

An alternate way of interpreting your reply to me is if you also categorize McMaster's website behavior as a form of "MPA". In other words, you classify McMaster's loading of new HTML fragments and rewriting DOM as "multiple pages". I've not heard others define MPA in this way.

>, everything on that search engine would be trivially accomplished using a server rendered HTML approach without needing to utilize a SPA. It's actually a great example of something that would work great with progressive enhancement - the search bar can start as a simple input that leads to full page search results, the navigation can do a full page refresh

Yes, we've already agreed about it being technically trivial. The issue is end user's preferred UI experience. Users don't want the "page refresh/reload" even though it's trivial.

[ryanbrunner]

I think a lot of the time "SPA" vs "MPA" essentially actually means "does the client largely render it's own HTML" or "does the server render HTML and the client just displays it". Whether it displays that with a full page refresh or by injecting HTML via Javascript does not in practice matter. The idea of using AJAX to render HTML fragments to increase interactivity predates the term "SPA" by about a decade.

That's not really strictly the same thing as what the acronyms SPA and MPA, but in reality, people refer to a Rails application that uses large amounts of Hotwire as a "MPA" (even if it never results in full page refreshes and often doesn't even feel like navigating pages) and things built with tools like React as "SPAs" (even if you're perfectly capable of navigating between pages and getting React rendered by the server until the client takes over routing.

If your definition of "MPA" is "every interaction requires a full page load", it's a pointless discussion, because that's not really the reality of development even with "MPA" frameworks like Rails or Phoenix (I can't really speak to stuff like Laravel, but I'm sure they have an equivalent)

Maybe a good way to think about it is that the fundamental interaction model of frameworks like Rails is that they're built around the concept of the server returning new pages on navigation, and optimize that to provide a better experience, and SPAs are designed around the idea of a single web page visit instantiating an application at which point the client is control of navigation, but they optimize that to provide a better user experience (i.e. server side rendering of pages on first load).

[jasode]

>I think a lot of the time "SPA" vs "MPA" essentially actually means "does the client largely render it's own HTML" or "does the server render HTML and the client just displays it".

It seems like there was already terminology of CSR-vs-SSR (client-side vs server-side rendering) to differentiate that so there was no need for SPA-vs-MPA to overlap with CSR/SSR to try and make the same distinction.

>Whether it displays that with a full _page_ refresh or by injecting HTML via Javascript does not in practice matter.

It seemed like the 'P' in SPA-vs-MPA is literally about the Page(s) being reloaded. It's "single page" or "multiple pages". That's why developers like to clarify that Next.js -- even with SSR HTML hydration of various subpages -- is still an SPA because the page on the client-side browser isn't reloaded. I just did some skimming of various "SPA vs MPA" search results and none seemed to use those acronyms as a way to classify CSR-vs-SSR. (https://www.google.com/search?q=spa+vs+mpa)

I'm also not clear how you classify Mcmaster.com ? Is it an MPA to you?

>If your definition of "MPA" is "every interaction requires a full page load", it's a pointless discussion,

No I'm not saying every interaction. I was responding to your original suggestion of "MPA with query parameters to a results page" ... and showing how McMaster.com search filters do not work the way you recommend it should. Each click of navigation and filters triggers a JSON payload and dynamically rebuilds the DOM tree. The browser's performance.timing.loadEventEnd property value does not change.