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feat(theme): add the page-enter and content-enter arrival animations #896

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d8d495f
feat(theme): add the page-enter and content-enter arrival animations
gabriel-lisboa-azion Aug 14, 2026
979583c
docs(webkit): teach the two arrival animations in webkit-motion-polish
gabriel-lisboa-azion Aug 14, 2026
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14 changes: 14 additions & 0 deletions packages/theme/dist/v4/globals.css
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Original file line number Diff line number Diff line change
Expand Up @@ -409,6 +409,8 @@
--animate-fade-out: fadeOut 220ms ease-in-out;
--animate-slide-down: slideDown 220ms ease-in-out;
--animate-highlight-fade: highlight 1100ms ease-in forwards;
--animate-page-enter: pageEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1);
--animate-content-enter: contentEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1) var(--content-enter-delay, 0s) backwards;
--animate-popup-scale-in: popupScaleIn 150ms cubic-bezier(0.39, 0.57, 0.56, 1);
--animate-popup-scale-out: popupScaleOut 110ms cubic-bezier(0.55, 0.09, 0.68, 0.53);
--animate-slide-in-left: slideInLeft 240ms cubic-bezier(0.39, 0.57, 0.56, 1);
Expand Down Expand Up @@ -668,6 +670,8 @@
--animate-fade-out: fadeOut 220ms ease-in-out;
--animate-slide-down: slideDown 220ms ease-in-out;
--animate-highlight-fade: highlight 1100ms ease-in forwards;
--animate-page-enter: pageEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1);
--animate-content-enter: contentEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1) var(--content-enter-delay, 0s) backwards;
--animate-popup-scale-in: popupScaleIn 150ms cubic-bezier(0.39, 0.57, 0.56, 1);
--animate-popup-scale-out: popupScaleOut 110ms cubic-bezier(0.55, 0.09, 0.68, 0.53);
--animate-slide-in-left: slideInLeft 240ms cubic-bezier(0.39, 0.57, 0.56, 1);
Expand Down Expand Up @@ -1013,6 +1017,16 @@
100% { background-position: -200% 0; }
}

@keyframes pageEnter {
0% { opacity: 0; translate: calc(var(--page-enter-distance, var(--layout-boundary-inline)) * -1) 0; }
100% { opacity: 1; translate: 0 0; }
}

@keyframes contentEnter {
0% { opacity: 0; translate: 0 var(--spacing-xs); }
100% { opacity: 1; translate: 0 0; }
}

@keyframes popupScaleIn {
0% { opacity: 0; transform: scale(0.9); }
100% { opacity: 1; transform: scale(1); }
Expand Down
14 changes: 14 additions & 0 deletions packages/theme/dist/v4/globals.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -409,6 +409,8 @@
--animate-fade-out: fadeOut 220ms ease-in-out;
--animate-slide-down: slideDown 220ms ease-in-out;
--animate-highlight-fade: highlight 1100ms ease-in forwards;
--animate-page-enter: pageEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1);
--animate-content-enter: contentEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1) var(--content-enter-delay, 0s) backwards;
--animate-popup-scale-in: popupScaleIn 150ms cubic-bezier(0.39, 0.57, 0.56, 1);
--animate-popup-scale-out: popupScaleOut 110ms cubic-bezier(0.55, 0.09, 0.68, 0.53);
--animate-slide-in-left: slideInLeft 240ms cubic-bezier(0.39, 0.57, 0.56, 1);
Expand Down Expand Up @@ -668,6 +670,8 @@
--animate-fade-out: fadeOut 220ms ease-in-out;
--animate-slide-down: slideDown 220ms ease-in-out;
--animate-highlight-fade: highlight 1100ms ease-in forwards;
--animate-page-enter: pageEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1);
--animate-content-enter: contentEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1) var(--content-enter-delay, 0s) backwards;
--animate-popup-scale-in: popupScaleIn 150ms cubic-bezier(0.39, 0.57, 0.56, 1);
--animate-popup-scale-out: popupScaleOut 110ms cubic-bezier(0.55, 0.09, 0.68, 0.53);
--animate-slide-in-left: slideInLeft 240ms cubic-bezier(0.39, 0.57, 0.56, 1);
Expand Down Expand Up @@ -1013,6 +1017,16 @@
100% { background-position: -200% 0; }
}

@keyframes pageEnter {
0% { opacity: 0; translate: calc(var(--page-enter-distance, var(--layout-boundary-inline)) * -1) 0; }
100% { opacity: 1; translate: 0 0; }
}

@keyframes contentEnter {
0% { opacity: 0; translate: 0 var(--spacing-xs); }
100% { opacity: 1; translate: 0 0; }
}

@keyframes popupScaleIn {
0% { opacity: 0; transform: scale(0.9); }
100% { opacity: 1; transform: scale(1); }
Expand Down
6 changes: 6 additions & 0 deletions packages/theme/src/tokens/primitives/animations/animate.js
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,8 @@ export const animate = {
'fade-out': 'fadeOut 220ms ease-in-out',
'slide-down': 'slideDown 220ms ease-in-out',
'highlight-fade': `highlight ${duration['slow-03']} ease-in forwards`,
'page-enter': `pageEnter ${duration['moderate-02']} ${curve['productive-entrance']}`,
'content-enter': `contentEnter ${duration['moderate-02']} ${curve['productive-entrance']} var(--content-enter-delay, 0s) backwards`,
'popup-scale-in': `popupScaleIn ${duration['moderate-01']} ${curve['productive-entrance']}`,
'popup-scale-out': `popupScaleOut ${duration['fast-02']} ${curve['productive-exit']}`,
'slide-in-left': `slideInLeft ${duration['moderate-02']} ${curve['productive-entrance']}`,
Expand All @@ -41,6 +43,10 @@ export const animate = {
}

export const useWhen = {
'page-enter':
'A page arriving on a route change — on the CONTENT ZONE only, never the shell. The chrome is the same before and after, and sliding it announces a reload that did not happen. Key it on the route path so a component serving several paths still replays it. Nothing inside the page may animate on mount at the same time: the two run in lockstep and read as one element travelling on a diagonal.',
'content-enter':
'Content settling INSIDE a page that is already on screen — a loading window resolving, a filtered list swapping, a step changing. Never on first paint of a page whose own entrance is already running (use it after that entrance, or after a wire). Stagger a follower with --content-enter-delay.',
spin: 'Indeterminate circular spinners (loading icons).',
ping: 'One-off attention ring radiating from a small element (notification dot).',
pulse: 'Skeleton/placeholder opacity pulse while content loads.',
Expand Down
8 changes: 8 additions & 0 deletions packages/theme/src/tokens/primitives/animations/keyframes.js
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,14 @@ export const keyframes = {
'0%': 'background-position: 200% 0',
'100%': 'background-position: -200% 0'
},
pageEnter: {
'0%': 'opacity: 0; translate: calc(var(--page-enter-distance, var(--layout-boundary-inline)) * -1) 0',
'100%': 'opacity: 1; translate: 0 0'
},
contentEnter: {
'0%': 'opacity: 0; translate: 0 var(--spacing-xs)',
'100%': 'opacity: 1; translate: 0 0'
},
popupScaleIn: {
'0%': 'opacity: 0; transform: scale(0.9)',
'100%': 'opacity: 1; transform: scale(1)'
Expand Down
14 changes: 14 additions & 0 deletions packages/webkit/catalog.json
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Original file line number Diff line number Diff line change
Expand Up @@ -44,10 +44,12 @@
"--accent-selected",
"--animate-blink",
"--animate-bounce",
"--animate-content-enter",
"--animate-fade-in",
"--animate-fade-out",
"--animate-flow-dash",
"--animate-highlight-fade",
"--animate-page-enter",
"--animate-ping",
"--animate-popup-scale-in",
"--animate-popup-scale-out",
Expand Down Expand Up @@ -742,10 +744,12 @@
"animate": [
"--animate-blink",
"--animate-bounce",
"--animate-content-enter",
"--animate-fade-in",
"--animate-fade-out",
"--animate-flow-dash",
"--animate-highlight-fade",
"--animate-page-enter",
"--animate-ping",
"--animate-popup-scale-in",
"--animate-popup-scale-out",
Expand Down Expand Up @@ -1473,10 +1477,12 @@
"animations": [
"blink",
"bounce",
"content-enter",
"fade-in",
"fade-out",
"flow-dash",
"highlight-fade",
"page-enter",
"ping",
"popup-scale-in",
"popup-scale-out",
Expand All @@ -1500,6 +1506,10 @@
"value": "bounce 1s infinite",
"useWhen": "Playful attention bounce (scroll-down hints); use sparingly."
},
"content-enter": {
"value": "contentEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1) var(--content-enter-delay, 0s) backwards",
"useWhen": "Content settling INSIDE a page that is already on screen — a loading window resolving, a filtered list swapping, a step changing. Never on first paint of a page whose own entrance is already running (use it after that entrance, or after a wire). Stagger a follower with --content-enter-delay."
},
"fade-in": {
"value": "fadeIn 220ms ease-in-out",
"useWhen": "Content or backdrop appearing in place (no directional origin)."
Expand All @@ -1516,6 +1526,10 @@
"value": "highlight 1100ms ease-in forwards",
"useWhen": "Row/item briefly highlighted after an update (recently changed)."
},
"page-enter": {
"value": "pageEnter 240ms cubic-bezier(0.39, 0.57, 0.56, 1)",
"useWhen": "A page arriving on a route change — on the CONTENT ZONE only, never the shell. The chrome is the same before and after, and sliding it announces a reload that did not happen. Key it on the route path so a component serving several paths still replays it. Nothing inside the page may animate on mount at the same time: the two run in lockstep and read as one element travelling on a diagonal."
},
"ping": {
"value": "ping 1s cubic-bezier(0, 0, 0.2, 1) infinite",
"useWhen": "One-off attention ring radiating from a small element (notification dot)."
Expand Down
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