Tags: frontend

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Sunday, July 21st, 2019

Frontend Design, React, and a Bridge over the Great Divide

Brad describes how he has found his place in the world of React, creating UI components without dabbling in business logic:

Instead of merely creating components’ reference HTML, CSS, and presentational JS, frontend designers can create directly consumable HTML, CSS, and presentational JS that back-of-the-frontend developers can then breathe life into.

What’s clear is that the term “React” has become as broad and undefined as the term “front-end”. Just saying that someone does React doesn’t actually say much about the nature of the work.

When you say “we’re hiring a React developer”, what exactly do you mean by that? “React developer” is almost as vague as “frontend developer”, so clarify. Are you looking for a person to specialize in markup and styles? A person to author middleware and business logic? A person to manage data and databases? A person to own build processes?

How using component-based design helps us build faster

A case study from Twitter on the benefits of using a design system:

With component-based design, development becomes an act of composition, rather than constantly reinventing the wheel.

I think that could be boiled down to this:

Component-based design favours composition over invention.

I’m not saying that’s good. I’m not saying that’s bad. I’m also not saying it’s neutral.

Maybe You Don’t Need a Date Picker | Adrian Roselli

In some situations, a date picker is overkill:

I have relied on plain text inputs as date fields with custom validation for the site, typically using the same logic on the client and the server. For known dates — birthdays, holidays, anniversaries, etc — it has tested well.

5 Keys to Accessible Web Typography | Better Web Type

Some excellent explanations for these five pieces of sensible typography advice:

  1. Set your base font size in relative units
  2. Check the colour of your type and only then its contrast
  3. Use highly legible fonts
  4. Shape your paragraphs well
  5. Correctly use the heading levels

The Simplest Way to Load CSS Asynchronously | Filament Group, Inc.

Scott re-examines the browser support for loading everything-but-the-critical-CSS asynchronously and finds that it might now be as straightforward as this one declaration:

<link rel="stylesheet" href="/path/to/my.css" media="print" onload="this.media='all'">

I love the fact the Filament Group are actively looking at how deprecate their loadCSS polyfill—exactly the right attitude for polyfills in general.

Friday, July 19th, 2019

Micro Frontends

Chris succinctly describes the multiple-iframes-with-multiple-codebases approach to web development, AKA “micro frontends”:

The idea really is that you might build a React app and I build a Vue app and we’ll slap ‘em together on the same page. I definitely come from an era where we laughed-then-winced when we found sites that used multiple versions of jQuery on the same page, plus one thing that loaded all of MooTools and Prototype thrown on there seemingly by accident. We winced because that was a bucket full of JavaScript, mostly duplicated for no reason, causing bugs and slowing down the page. This doesn’t seem all that much different.

The Guardian digital design style guide

What a lovely way to walk through the design system underpinning the Guardian website.

Bonus points for using the term “tweak points”!

Thursday, July 18th, 2019

Intrinsically Responsive CSS Grid with minmax() and min()

When min() gets better support (it’s currently in Safari), we’ll be able to create container queryish declarations like this:

grid-template-columns: repeat(auto-fill, minmax(min(10rem, 100%), 1fr));

Ralph Lavelle: On resilience

Thoughts on frameworks, prompted by a re-reading of Resilient Web Design. I quite like the book being described as a “a bird’s-eye view of the whole web design circus.”

Tuesday, July 16th, 2019

Initial thoughts on standardizing form controls | Greg Whitworth

Greg has done a lot of research into developer frustrations with customising form controls.

My current thinking in this space, and I know some folks will find this controversial, but I think we should completely standardize in-page form controls with no limitations on their styling capabilities. What do I mean by in-page controls? I am referring to any form control or component that is rendered within the content process. This standardization would include the sub-parts and their related states and how these are exposed (probably through CSS psuedo classes or HTML attributes). This will enable the shadow-dom to be encapsulated while providing web developers with a consistent experience to adjust to match their brand and needs of their site/application.

How to Kill IE11 - What the Deaths of IE6 and IE8 Tell Us About Killing IE | Mike Sherov

An interesting look at the mortality causes for Internet Explorer 6 and Internet Explorer 8, and what they can tell us for the hoped-for death of Internet Explorer 11.

I disagree with the conclusion (that we should actively block IE11—barring any good security reasons, I don’t think that’s defensible), but I absolutely agree that we shouldn’t be shipping polyfills in production just for IE11. Give it your HTML. Give it your CSS. Withhold modern JavaScript. If you’re building with progressive enhancement (and you are, right?), then giving IE11 users a sub-par experience is absolutely fine …it’s certainly better than blocking them completely.

Saturday, July 6th, 2019

Chaos Design: Before the robots take our jobs, can we please get them to help us do some good work?

This is a great piece! It starts with a look back at some of the great minds of the nineteenth century: Herschel, Darwin, Babbage and Lovelace. Then it brings us, via JCR Licklider, to the present state of the web before looking ahead to what the future might bring.

So what will the life of an interface designer be like in the year 2120? or 2121 even? A nice round 300 years after Babbage first had the idea of calculations being executed by steam.

I think there are some missteps along the way (I certainly don’t think that inline styles—AKA CSS in JS—are necessarily a move forwards) but I love the idea of applying chaos engineering to web design:

Think of every characteristic of an interface you depend on to not ‘fail’ for your design to ‘work.’ Now imagine if these services were randomly ‘failing’ constantly during your design process. How might we design differently? How would our workflows and priorities change?

Friday, July 5th, 2019

Smashing TV — Webinars and Live Sessions — Smashing Magazine

Don’t miss this—a masterclass in SVG animation with Cassie (I refuse to use the W word). Mark your calendar: August 20th.

Wednesday, July 3rd, 2019

You are not connected to the Internet

This is a very cute offline page. Ali Spittel has written up how it was made too.

Toast

Chris describes exactly why I wrote about toast:

But we should be extra watchful about stuff like this. If any browser goes rogue and just starts shipping stuff, web standards is over. Life for devs gets a lot harder and the web gets a lot worse. The stakes are high. And it’s not going to happen overnight, it’s going to happen with little tiny things like this. Keep that blue beanie on.

How Google Pagespeed works: Improve Your Score and Search Engine Ranking

Ben shares the secret of SEO. Spoiler: the villain turns out to be Too Much JavaScript. Again.

Time to Interactive (TTI) is the most impactful metric to your performance score.

Therefore, to receive a high PageSpeed score, you will need a speedy TTI measurement.

At a high level, there are two significant factors that hugely influence TTI:

  • The amount of JavaScript delivered to the page
  • The run time of JavaScript tasks on the main thread

Tuesday, July 2nd, 2019

The trimCache function in Going Offline …again

It seems that some code that I wrote in Going Offline is haunted. It’s the trimCache function.

First, there was the issue of a typo. Or maybe it’s more of a brainfart than a typo, but either way, there’s a mistake in the syntax that was published in the book.

Now it turns out that there’s also a problem with my logic.

To recap, this is a function that takes two arguments: the name of a cache, and the maximum number of items that cache should hold.

function trimCache(cacheName, maxItems) {

First, we open up the cache:

caches.open(cacheName)
.then( cache => {

Then, we get the items (keys) in that cache:

cache.keys()
.then(keys => {

Now we compare the number of items (keys.length) to the maximum number of items allowed:

if (keys.length > maxItems) {

If there are too many items, delete the first item in the cache—that should be the oldest item:

cache.delete(keys[0])

And then run the function again:

.then(
    trimCache(cacheName, maxItems)
);

A-ha! See the problem?

Neither did I.

It turns out that, even though I’m using then, the function will be invoked immediately, instead of waiting until the first item has been deleted.

Trys helped me understand what was going on by making a useful analogy. You know when you use setTimeout, you can’t put a function—complete with parentheses—as the first argument?

window.setTimeout(doSomething(someValue), 1000);

In that example, doSomething(someValue) will be invoked immediately—not after 1000 milliseconds. Instead, you need to create an anonymous function like this:

window.setTimeout( function() {
    doSomething(someValue)
}, 1000);

Well, it’s the same in my trimCache function. Instead of this:

cache.delete(keys[0])
.then(
    trimCache(cacheName, maxItems)
);

I need to do this:

cache.delete(keys[0])
.then( function() {
    trimCache(cacheName, maxItems)
});

Or, if you prefer the more modern arrow function syntax:

cache.delete(keys[0])
.then( () => {
    trimCache(cacheName, maxItems)
});

Either way, I have to wrap the recursive function call in an anonymous function.

Here’s a gist with the updated trimCache function.

What’s annoying is that this mistake wasn’t throwing an error. Instead, it was causing a performance problem. I’m using this pattern right here on my own site, and whenever my cache of pages or images gets too big, the trimCaches function would get called …and then wouldn’t stop running.

I’m very glad that—witht the help of Trys at last week’s Homebrew Website Club Brighton—I was finally able to get to the bottom of this. If you’re using the trimCache function in your service worker, please update the code accordingly.

Management regrets the error.

Monday, July 1st, 2019

Why Did I Have Difficulty Learning React? - Snook.ca

When people talk about learning React, I think that React, in and of itself, is relatively easy to understand. At least, I felt it was. I have components. I have JSX. I hit some hiccups with required keys or making sure I was wrapping child elements properly. But overall, I felt like I grasped it well enough.

Throw in everything else at the same time, though, and things get confusing because it’s hard at first to recognize what belongs to what. “Oh, this is Redux. That is React. That other thing is lodash. Got it.”

This resonates a lot with Dave’s post:

React is an ecosystem. I feel like it’s a disservice to anyone trying to learn to diminish all that React entails. React shows up on the scene with Babel, Webpack, and JSX (which each have their own learning curve) then quickly branches out into technologies like Redux, React-Router, Immutable.js, Axios, Jest, Next.js, Create-React-App, GraphQL, and whatever weird plugin you need for your app.

Variable Fonts for Developers

A showcase of fun experiments with variable fonts, courtesy of Mandy.

8 DOM features you didn’t know existed - LogRocket Blog

If you ignore the slightly insulting and condescending clickbaity title, this is a handy run-down of eight browser features with good support:

  1. extra arguments in addEventListener(),
  2. scrollTo(),
  3. extra arguments in setTimeout() and setInterval(),
  4. the defaultChecked property for checkboxes,
  5. normalize() and wholeText for strings of text,
  6. insertAdjacentElement() and insertAdjacentText(),
  7. event.detail, and
  8. scrollHeight and scrollWidth.