Tags: server

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Time to First Byte: What It Is and Why It Matters by Harry Roberts

Harry takes a deep dive into the performance metric of “time to first byte”, or TTFB if you using initialisms that take as long to say as the thing they’re abbreviating.

This makes a great companion piece to Drew’s article on server timing headers.

Ooops, I guess we’re full-stack developers now.

Chris broke both his arms just to avoid speaking at the JAMstack conference in London. Seems a bit extreme to me.

Anyway, to make up for not being there, he made a website of his talk. It’s good stuff, tackling the split.

It’s cool to see the tech around our job evolve to the point that we can reach our arms around the whole thing. It’s worthy of some concern when we feel like complication of web technology feels like it’s raising the barrier to entry

The Crushing Weight of the Facepile—zachleat.com

Using IntersectionObserver to lazy load images—very handy for webmention avatars.

Making QR codes with cloud functions • tommorris.org

Tom makes an endpoint for generating QR codes so you don’t have to rely on the Google Charts API.

He also provides a good definition of “serverless”:

Now, serverless is a very silly buzzword dreamed up by someone from the consultant class who love coming up with terrible names, so I promise I won’t use it any further. Your code obviously run on a server. It just means it runs on a server someone else manages.

Amazon call it a ‘Lambda Function’. Google call it a ‘Cloud Function’. Microsoft Azure call it simply a ‘Function’. But none of those are very descriptive, because, well, anyone who writes any kind of programming language generally writes functions pretty much all the time in much the same way as anyone who writes English writes paragraphs, and we don’t call our blogging software “Cloud Paragraphs”. (Someone will now, I’m guessing.)

The Web Developer’s Guide to DNS | RJ Zaworski

At Codebar the other night, I was doing an intro chat with some beginners. At one point I touched on DNS. This explanation is great for detailing what’s going on under the hood.

Disenchantment - Tim Novis

I would urge front-end developers to take a step back, breathe, and reassess. Let’s stop over engineering for the sake of it. Let’s think what we can do with the basic tools, progressive enhancement and a simpler approach to building websites. There are absolutely valid usecases for SPAs, React, et al. and I’ll continue to use these tools reguarly and when it’s necessary, I’m just not sure that’s 100% of the time.

Slashed URI

This is my kind of URL nerdery. Remy ponders all the permutations of URLs ending with slashes, ending without slashes, ending with with a file extension…

Tuning Performance for New and “Old” Friends | Filament Group, Inc., Boston, MA

This is a really clever technique from Scott that he unveiled at An Event Apart in Seattle. It uses a header sent by a service worker to distinguish between returning and new visitors—much neater than relying on a cookie. I’ve updated my service worker on The Session to use this technique now.

Cache-Control for Civilians – CSS Wizardry

Harry breaks down cache-control headers into steps that even I can understand. I’ll be using this a reference for sure.

Quick Note: Setting up a localhost on a Mac | scottohara.me

Okay, I knew about the Python shortcut—I mentioned it in Going Offline—but I had no idea it was so easy to do the same thing for PHP. This is a bit of a revelation for me!

Once in the desired directory, run:

php -S localhost:2222

Now you can go to “localhost:2222” in your browser, and if you have an index.html or .php file in your root directory, you’re in business.

How to Build a Low-tech Website?

This is fascinating! A website that’s fast and nimble, not for performance reasons, but to reduce energy consumption. It’s using static files, system fonts and dithered images. And no third-party scripts.

Thanks to a low-tech web design, we managed to decrease the average page size of the blog by a factor of five compared to the old design – all while making the website visually more attractive (and mobile-friendly). Secondly, our new website runs 100% on solar power, not just in words, but in reality: it has its own energy storage and will go off-line during longer periods of cloudy weather.

Ping! That’s the sound of my brain going “service worker!”

I’ve sent them an email offering my help.

StaticGen | Top Open Source Static Site Generators

There are a lot of static site generators out there!

When 7 KB Equals 7 MB - Cloud Four

I remember Jason telling me about this weird service worker caching behaviour a little while back. This piece is a great bit of sleuthing in tracking down the root causes of this strange issue, followed up with a sensible solution.

Web Push Notifications Demo | Microsoft Edge Demos

Push notifications explained using astrology. But don’t worry, there’s also some code, just in case you prefer your explanations to also include models that actually work.

Responsive Components: a Solution to the Container Queries Problem — Philip Walton

Here’s a really smart approach to creating container queries today—it uses ResizeObserver to ensure that listening for size changes is nice and performant.

There’s a demo site you can play around with to see it in action.

While the strategy I outline in this post is production-ready, I see us as being still very much in the early stages of this space. As the web development community starts shifting its component design from viewport or device-oriented to container-oriented, I’m excited to see what possibilities and best practices emerge.

The Power of Serverless

Chris has set up a whole site dedicated to someone-else’s-server sites with links to resources and services (APIs), along with ideas of what you could build in this way.

Here’s one way to think about it: you can take your front-end skills and do things that typically only a back-end can do. You can write a JavaScript function that you run and receive a response from by hitting a URL. That’s sometimes also called Cloud Functions or Functions as a Service, which are perhaps better names, but just a part of the whole serverless thing.

Finding Dead CSS – CSS Wizardry

Here’s a clever idea from Harry if you’re willing to play the long game in tracking down redundant CSS—add a transparent background image to the rule block and then sit back and watch your server logs for any sign of that sleeper agent ever getting activated.

If you do find entries for that particular image, you know that, somehow, the legacy feature is potentially still accessible—the number of entries should give you a clue as to how severe the problem might be.

russellgoldenberg/scrollama: Scrollytelling with IntersectionObserver.

This looks like a handy JavaScript library for scroll-based events. But “scrollytelling?” No. Just …no.

Netflix functions without client-side React, and it’s a good thing - JakeArchibald.com

A great bucketload of common sense from Jake:

Rather than copying bad examples from the history of native apps, where everything is delivered in one big lump, we should be doing a little with a little, then getting a little more and doing a little more, repeating until complete. Think about the things users are going to do when they first arrive, and deliver that. Especially consider those most-likely to arrive with empty caches.

And here’s a good way of thinking about that:

I’m a fan of progressive enhancement as it puts you in this mindset. Continually do as much as you can with what you’ve got.

All too often, saying “use the right tool for the job” is interpreted as “don’t use that tool!” but as Jake reminds us, the sign of a really good tool is its ability to adapt instead of demanding rigid usage:

Netflix uses React on the client and server, but they identified that the client-side portion wasn’t needed for the first interaction, so they leaned on what the browser can already do, and deferred client-side React. The story isn’t that they’re abandoning React, it’s that they’re able to defer it on the client until it’s was needed. React folks should be championing this as a feature.