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@stefanjudis
Back to boring
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@stefanjudis
stefanjudis.com | webweekly.email
Heyo,
I'm Stefan!
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checklyhq.com
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webweekly.email
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This is all way too
complicated and too much
code for a website...
My CTO from almost 10 years ago
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This is how
we do it!
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SPA MPA
SSG SSR Edge Rendering
(Partial) Hydration
Server Components
Resumability
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SPA MPA
SSG SSR Edge Rendering
(Partial) Hydration
Server Components
Resumability
It's a lot!
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Stefan, welcome to Canada!
Access 1 MB of data for 1 Euro!
(~1.46 CA$)
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2013
Hello world!
10KB / 50KB
2023
Hello world!
100KB / 300KB*
Complexity
* powered by 200MB+ of text files #node_modules
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cwvtech.report
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Core Web Vitals Technology Report
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No content
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Core Web Vitals Technology Report
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UX DX
My misconception
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I do feel overwhelmed by the pace of change. [...]
JavaScript is meant to feel overwhelming.
It’s where we try stu! out.
It’s where stu! moves fast.
Jeremy Keith
Source: "Building" presentation
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JavaScript
CSS
HTML
HTTP
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The web platform
wasn't ready...
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The web platform
still isn't ready...
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The web platform
still isn't ready...
(but we'll get there sooner than later)
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A cross-browser effort to reach a state where
each technology works exactly the same in every browser.
Interop
Source: wpt.fyi/interop-2023
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A cross-browser effort to reach a state where
each technology works exactly the same in every browser.
Interop
Source: wpt.fyi/interop-2023
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Aspect Ratio Cascade Layers
Color spaces and functions
Dialog Grid Flex Subgrid
Containment Scrolling
Interop 2022
*
* This list is not complete.
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Container Queries
:has() Inert @property
Import Maps
Font features color-mix
:nth-child(of syntax)
Interop 2023
*
* This list is not complete.
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open-ui.org
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How hard can it be
to show a tooltip?
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Floating UI Popper
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.toggleBtn {
anchor-name: -#my-anchor;
}
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.toggleBtn {
anchor-name: -#my-anchor;
}
#something {
-#width: 15rem;
-#height: 5rem;
anchor-default: -#my-anchor;
position-fallback: -#left-to-bottom;
}
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.toggleBtn {
anchor-name: -#my-anchor;
}
#something {
-#width: 15rem;
-#height: 5rem;
anchor-default: -#my-anchor;
position-fallback: -#left-to-bottom;
}
@position-fallback -#left-to-bottom {
@try {
top: calc(anchor(center) - var(-#height) / 2);
left: calc(anchor(right));
}
@try {
top: calc(anchor(center) - var(-#height) / 2);
right: calc(anchor(left));
left: auto;
}
}
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@position-fallback -#left-to-bottom {
@try {
top: calc(anchor(center) - var(-#height) / 2);
left: calc(anchor(right));
}
@try {
top: calc(anchor(center) - var(-#height) / 2);
right: calc(anchor(left));
left: auto;
}
}
!
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Popover Anchor Positioning
114 ✅
17 #
114 $
117 #
%
&
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How hard can it be to
write maintainable CSS?
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1
Variables
2
Color functions
3
Nesting
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Variables
?
Color functions
?
Nesting
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.box {
background: PaleVioletRed;
}
#DB7093
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: var(-#my-color);
}
#DB7093
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: rgb(from var(-#my-color) r g b);
}
rgb(219 112 147)
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: rgb(from var(-#my-color) r g b);
}
rgb(219 112 147)
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: rgb(from var(-#my-color) g r b);
}
rgb(112 219 147)
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: rgb(from var(-#my-color) g b r);
}
rgb(112 147 219)
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: hsl(from var(-#my-color) h s l);
}
hsl(340deg 60% 65%)
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: hsl(from var(-#my-color) h s calc(l + 20%));
}
hsl(340deg 60% 85%)
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: hsl(from var(-#my-color) h 0% calc(l + 20%));
}
hsl(340deg 0% 85%)
Relative colors
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.box {
-#my-color: PaleVioletRed;
background: oklch(from var(-#my-color) calc(l + 0.2) c h);
}
oklch(0.87 0.13 0.68)
Relative colors
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colorInput.showPicker();
hsl(from #38571a h s 0%)
color-contrast(#38571a vs #000, #fff)
(behind a flag)
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Variables Relative colors
?
Nesting
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.card {
.container {
display: flex;
flex-direction: column;
gap: 1em;
}
.header {
aspect-ratio: 3 / 2;
}
& h2, & p {
margin: 0;
}
} Waiting for Firefox 116
(Shipping in ~3 weeks)
Photo by Ben Michel on Unsplash
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.card {
.container {
display: flex;
flex-direction: column;
gap: 1em;
}
.header {
aspect-ratio: 3 / 2;
}
& h2, & p {
margin: 0;
}
} Waiting for Firefox 116
(Shipping in ~3 weeks)
'
Photo by Ben Michel on Unsplash
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Source: developer.chrome.com/articles/css-nesting/
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.card {
h1 {}
}
.card {
& h1 {}
}
.card {
:is(h1) {}
}
Valid
Valid
X Invalid
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How hard can it be to create
responsive UI components?
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.wide-nav {
display: none;
@media (min-width: 63rem) {
display: flex;
}
}
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Source: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_container_queries
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.card {
.container {
display: flex;
flex-direction: column;
}
}
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.card {
container-type: inline-size;
.container {
display: flex;
flex-direction: column;
@container (width > 400px) {
flex-direction: row;
}
}
}
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.card {
container-type: inline-size;
.container {
display: flex;
flex-direction: column;
@container (width > 400px) {
flex-direction: row;
.header {
flex: 0 0 25cqw;
}
}
}
}
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.card {
container-type: inline-size;
.container {
display: flex;
flex-direction: column;
@container (width > 400px) {
flex-direction: row;
.header {
flex: 0 0 25cqw;
}
}
}
}
cqw 1% of a query container's width
cqh 1% of a query container's height
cqi 1% of a query container's inline size
cqb 1% of a query container's block size
cqmin The smaller value of either cqi or cqb
cqmax The larger value of either cqi or cqb
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.container {
container-type: size;
height: 12rem;
}
@container (orientation: portrait) {
.portrait {
display: grid;
}
.landscape {
display: none;
}
}
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.card {
container-type: inline-size;
.container {
display: flex;
flex-direction: column;
}
}
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.card {
container-type: inline-size;
.container {
display: flex;
flex-direction: column;
}
&:has(img[src*="dog"]) {
background: url(./dog.svg);
}
}
Behind a flag
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article:has(aside) { /% ..' *) }
form:has(:invalid) { /% ..' *) }
:root:has(.menu-toggle[aria-pressed=”true”]) {
/% ..' *)
}
label:has(+ input) { /% … *) }
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developer.chrome.com/blog/has-m105/
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CSS has become a more
complete mature language,
that works better with the
way we build websites today.
Una Kravets
Source: The state of the CSS community
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How hard can it be to
load a perfect image?
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sizes="
(max-width: 768px) calc(100vw - 3em),
(max-width: 1376px) calc(50vw - 8em),
550px">
<1picture>
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<1picture>
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<1picture>
type="image/webp"
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<1picture>
srcset="
https:/0images.ctfassets.net/..'/paris.jpg?w=100&fm=webp 100w,
https:/0images.ctfassets.net/..'/paris.jpg?w=200&fm=webp 200w,
..'"
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<1picture>
sizes="
(max-width: 768px) calc(100vw - 3em),
(max-width: 1376px) calc(50vw - 8em),
550px"
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<1picture>
loading="lazy"
sizes="
(max-width: 768px) calc(100vw - 3em),
(max-width: 1376px) calc(50vw - 8em),
550px"
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If images are lazy loaded,
let the browser pick the best size.
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Could this be a thing?
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How hard can it be to
build delightful UI?
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codepen.io/stefanjudis/pen/abQLvOW
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function transitionStuff(data) {
/0 For non-Chromiums
if (!document.startViewTransition) {
updateTheDOMSomehow();
return;
}
/0 browser: ( (old)
document.startViewTransition(() =3 {
updateTheDOMSomehow();
/0 browser: ( (new)
})
}
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movies.nuxt.space
export default defineNuxtConfig({
experimental: {
viewTransition: true
}
})
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live-transitions.pages.dev
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Multipage transitions
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stefanjudis.com
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smashing-transitions.netlify.app
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developer.chrome.com/docs/web-platform/view-transitions/
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The web platform
is catching up!
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JavaScript leads the
way to the "next web"...
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... coming with a better user
and developer experience!
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Video platforms Blogs Shops
Image & Illustration software
Marketing sites Games
Productivity Apps PWAs
Streaming sites Social Networks
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If your site feels like
a "boring" Multi Page App,
maybe it should be one?
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If JavaScript doesn't bring users joy,
thank it, and throw it away.
Marie Kondo
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If JavaScript doesn't bring users joy,
thank it, and throw it away.
Marie Kondo Addy Osmani
Source: The Cost of JavaScript 2023
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@stefanjudis
stefanjudis.com | webweekly.email
Thanks.