Files
hyperframes/docs/catalog/components/state-chip-rail.mdx
Miguel ÁngelandMiguel Angel Simon Sierra 1ae2067b8d feat(catalog): put the variables panel back, on payloads (#3199)
* feat(catalog): put the variables panel back, on payloads

The panel drove its preview by loading an .html from docs/public, a type the
host does not publish, so it showed an empty frame in production and was
parked when the catalog was re-landed.

It now mounts the same JSON payload the plain player uses and re-mounts it as
values change, injecting them as window.__hfVariables into the composition head
before any of its scripts run, which is where the runtime reads overrides from.
Doing it in the markup rather than after load is what stops the composition
initialising with the wrong values first.

172 items with variables get the panel back; the playhead carries across a
change so a tweak mid-shot does not jump back to frame zero.

* fix(docs): drop the unused url form and the needless escapes

* fix(docs): the panel cannot reference a binding beside the export

* feat(catalog): make importing an SVG the obvious move

A reader arrives at this control with a shape, not with path data, and the
panel asked for the coordinates first. Import is now the primary action in a
drop target you can see is a drop target, and the raw path sits behind a
disclosure for anyone who wants it.

* feat(cli): let a fruitless catalog search report the gap

An agent that searches by meaning and finds nothing worth installing knows
something we do not: the name of a move the catalog is missing. There was no
way to tell us, so that knowledge was lost at the end of every run.

hyperframes feedback --search-miss "<query>" --wanted "<the move>" records it.
It carries no rating, so it never lands in the rating metric, and it is a
separate deliberate command rather than something catalog --query does on its
own: plain search still sends nothing, which is what the CLI promises.

--rating stops being required at the arg level, since a miss has no rating to
give. The check moved into the run body, where an absent one is now handled
rather than crashing on undefined.

* feat(cli): carry tuned variable values into the install snippet

Someone who tunes a block on its catalog page had no way to keep those values:
the install command was the same one everybody gets, and the tuning stayed on
the page.

hyperframes add <item> --vars '<json>' now prints a mount element carrying
data-variable-values, so the values land where the block is used.

They ride on the host rather than being written into the installed file. That
keeps the composition on disk byte-identical to the registry's, so a later
reinstall can still tell an edit from an update, and it lets two mounts of the
same block carry different values.

* fix(catalog): serve the item's own directory so runtime paths resolve

Some compositions assemble their asset URLs at run time —
"compositions/components/" + texture + ".png" for the texture masks, a font the
compiler pulled into _remote_media — and no scan of the markup can see a string
that does not exist until a script concatenates it. Those items either rendered
black or were dropped to a video that had never been uploaded.

Each item that needs it now has its prepared directory published, and its
payload carries a <base> pointing at it, so any relative path the composition
invents resolves. caption-texture renders its masks again, and
variable-font-flex has a preview at all for the first time: its MP4 and poster
are both 403.

Both layouts are published, because which one a composition asks for differs
per item, and a directory only earns that if it is under 2 MB. The 12 MB
texture sheet keeps the recorded video it already had.

* fix(catalog): let the variables panel actually drive the composition

Every control on the panel was inert. The values reached the composition and
nothing repainted, because the payload had already been compiled: compiling
inlines a mounted component and resolves its variables into the markup and CSS,
so by the time a reader turns a knob there is nothing left to change.

An item that declares variables now ships uncompiled, keeping the mount the
runtime loads at run time, which is the only state where data-variable-values
still means anything. The component travels inline as a data URI rather than a
sibling file, because .html is the one type the docs host will not publish. The
demo's own pinned values come off, so the reader's choices reach the mount
instead of losing to the values the demo picked to show itself off.

Measured on the rendered frame rather than the DOM: green rgb(98,207,144),
blue rgb(6,6,199), violet rgb(177,147,230), and back to green.

docs/public/catalog drops from 48 MB to 35 MB along the way, since an
uncompiled payload carries far less than an inlined one.

* feat(catalog): keep variable changes in the url

A reader who tuned a piece lost it on reload, and had nothing to send anyone.
The values now live in the query string, scoped by composition id so two links
never read each other,and only the ones that differ from the defaults are
written, so changing one knob gives a short URL rather than every variable
spelled out.

replaceState rather than pushState: dragging a slider should not leave a trail
of history entries. An unreadable value is ignored rather than thrown, so a
truncated or hand-edited link opens the piece at its defaults.

* fix(catalog): only rewrite the url when a value actually changed

* refactor(catalog): memoise the declared defaults on their content

* feat(catalog): offer an install command carrying the tuned values

The Install block is generated before anyone touches a knob, so it can only
ever print the plain command. Someone who spent a minute tuning a piece copied
it and got the defaults back.

The panel now carries its own command in the Snippet tab, with --vars holding
exactly the values that differ. An untouched piece still offers the same short
command, so nothing gets noisier for the common case.

* fix(catalog): a piece with nothing to render is a skip, not a failure

caption-blend-difference is a stylesheet and a paragraph of prose — a class you
add to your own captions, with no standalone scene to show. The generator
treated that as a build failure, so every run ended by reporting something
broken when nothing was.

It now reports the shape it is and keeps its recorded video, which is the only
honest preview such an item has. A genuine render failure still throws.

* fix(catalog): restore variables from the url on a cold load

A shared link opened at the defaults. The first render happens on the server,
where there is no window to read the query string from, and React then hydrates
against that markup and never revisits it — so the values only appeared once you
touched a control.

The URL is read again after mount, which is the first moment it exists. The
value is also escaped once now rather than twice: URLSearchParams already
decodes on the way out, and decoding a second time turned an SVG path full of
percent-escapes into something that no longer parsed, besides doubling the
length of every link.

* fix(catalog): mount the preview with the values a link carried

The frame was built from the declared defaults and the shared values were
posted to it afterwards, which is too late for anything the composition reads
once at init: a path arrived after the mark had already been drawn from the
default one, so a link looked right in the panel and wrong on screen.

* feat(catalog): the install command follows the values you tuned

Copying the Install line gave the plain command back, because that block is
generated before anyone touches a knob and had no way to know what changed. The
tuned command only existed in the panel Snippet tab, which is not where anyone
looks for it.

The line now reads the same query string the panel writes, so the two agree
without either component knowing the other exists, and a shared link carries the
right command too. replaceState fires no event, so the panel announces its own
writes.

* fix(catalog): send a text variable to the preview once it is finished

Every other control in the explorer reports a whole value on every event: a
slider at any position is a position, a swatch is a colour. A text field is
not. Typing v3 into a badge posted v first, so the preview remounted and
rendered a composition built from half a word.

The post now waits while a text field has focus and goes out when the edit is
committed, with Enter or by clicking away. The field itself is unchanged and
still tracks every keystroke.

---------

Co-authored-by: Miguel Angel Simon Sierra <miguelangelsi07@gmail.com>
2026-08-10 22:40:01 -04:00

803 lines
36 KiB
Plaintext

---
title: "State Chip Rail"
description: "A rail of mono status chips advances a seek-safe data-state snap machine on a cue schedule: active chip ink on surface, done chips dim, pending chips hollow, optional badges pop beside one state."
---
import { InstallCommand } from "/snippets/install-command.jsx";
import { VariablesExplorer } from "/snippets/variables-explorer.jsx";
<VariablesExplorer
previewSrc="/public/catalog/components/state-chip-rail.json"
compositionId="state-chip-rail"
compositionSrc="compositions/components/state-chip-rail.html"
variables={[{"id":"states","type":"string","role":"content","label":"States","description":"Comma-separated chip labels in machine order (2 to 8 states).","default":"Queued,Reading,Drafting,Done"},{"id":"times","type":"string","role":"timing","label":"Times","description":"Comma-separated activation times in seconds, one per advance (state 1 onward). Blank entries use the default even rhythm.","default":""},{"id":"badge_state","type":"number","role":"content","label":"Badge state","description":"Index of the state the badges pop beside.","default":1,"min":0,"max":7,"step":1},{"id":"badges","type":"string","role":"content","label":"Badges","description":"Comma-separated badge labels shown beside the badge state. Empty disables.","default":""},{"id":"accent","type":"enum","role":"style","label":"Accent","description":"Accent token family used by the active chip.","default":"green","options":[{"value":"green","label":"Green"},{"value":"blue","label":"Blue"},{"value":"violet","label":"Violet"}]},{"id":"exit","type":"enum","role":"timing","label":"Exit","description":"How the rail leaves the frame. Default none: the hold ends the film.","default":"none","options":[{"value":"none","label":"None"},{"value":"fade","label":"Fade"},{"value":"up","label":"Up"}]}]}
>
```html state-chip-rail.html
<!doctype html>
<!--
state-chip-rail: HyperFrames video primitive (product demo / state machine)
A rail of mono status chips advances a data-state snap machine on a cue
schedule. CSS alone responds to each chip's [data-state]; the timeline only
flips attributes with tl.set, so every advance is an instantaneous snap that
is exact in both seek directions (GSAP zero-duration sets record the prior
attribute value and restore it on backward seeks). The active chip is ink on
surface, done chips dim, pending chips stay hollow. Optional badges pop
beside one named state when it activates. Generalizes the flagship
agent-console status rail (cohere-north frame 04).
Variables (declared in data-composition-variables below):
- states (string, default "Queued,Reading,Drafting,Done"): comma list of
chip labels, in machine order. 2 to 8 states; extras are dropped.
- times (string, default ""): comma-separated activation times in seconds
relative to mount start, one per ADVANCE (state 1, state 2, ...).
Blank or invalid entries use the default even rhythm. Values are
clamped into the mount window and forced monotonic.
- badge_state (number, default 1): index of the state the badges pop
beside. Clamped to the states range.
- badges (string, default ""): comma list of badge labels rendered after
the badge_state chip; they pop in when that state activates. Empty
disables badges. Up to 4.
- accent (green | blue | violet, default green): active-chip accent.
green -> --brand, blue -> --accent, violet -> --accent-2.
- exit ("none" | "fade" | "up", default "none"): frame roots own
transitions; the default hold-ends-the-film.
Envelope, fixed IN with elastic HOLD (never gsap.timeScale()):
IN = chip cascade (~0.8s) then the advance schedule; the default
rhythm spreads advances so the final state lands ~1s before the
mount window closes.
HOLD = still after the last advance; nothing floats, nothing loops.
OUT = 0 when exit is "none"; else 0.45s fade / fade-up of the rail.
Mount contract: elastic root, no data-width/data-height, styled via #root
only, container-type: size, one paused timeline registered under the
literal "state-chip-rail" key. Deterministic and seek-safe: fromTo
entrances, attribute snaps via tl.set, no CSS transitions, no Date.now,
no randomness. State dimming rides color (color-mix), never opacity, so it
can never collide with the entrance opacity tweens.
-->
<html
lang="en"
data-composition-id="state-chip-rail"
data-composition-duration="5"
data-composition-variables='[
{ "id": "states", "type": "string", "role": "content", "label": "States", "description": "Comma-separated chip labels in machine order (2 to 8 states).", "default": "Queued,Reading,Drafting,Done" },
{ "id": "times", "type": "string", "role": "timing", "label": "Times", "description": "Comma-separated activation times in seconds, one per advance (state 1 onward). Blank entries use the default even rhythm.", "default": "" },
{ "id": "badge_state", "type": "number", "role": "content", "label": "Badge state", "description": "Index of the state the badges pop beside.", "default": 1, "min": 0, "max": 7, "step": 1 },
{ "id": "badges", "type": "string", "role": "content", "label": "Badges", "description": "Comma-separated badge labels shown beside the badge state. Empty disables.", "default": "" },
{ "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Accent token family used by the active chip.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
{ "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "How the rail leaves the frame. Default none: the hold ends the film.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
]'
>
<head>
<meta charset="UTF-8" />
<title>State Chip Rail</title>
</head>
<body>
<template>
<div id="root" data-composition-id="state-chip-rail" data-duration="5" data-fps="30">
<style>
*,
*::before,
*::after {
box-sizing: border-box;
}
#root {
position: absolute;
inset: 0;
overflow: hidden;
container-type: size;
isolation: isolate;
background: var(--bg, transparent);
color: var(--fg, #f8fafc);
font-family: var(--font-mono, ui-monospace, "SF Mono", Menlo, Consolas, monospace);
pointer-events: none;
}
.scr-clip {
position: absolute;
inset: 0;
display: grid;
place-items: center;
overflow: hidden;
}
.scr-rail {
display: flex;
align-items: center;
justify-content: center;
flex-wrap: nowrap;
max-width: 94cqw;
gap: var(--scr-gap, 0.8em);
font-size: var(--scr-font, 2cqmin);
will-change: transform, opacity;
}
.scr-chip,
.scr-badge {
display: flex;
flex: 0 0 auto;
align-items: center;
gap: 0.55em;
padding: 0.62em 1.05em;
overflow: hidden;
border: 0.16cqmin solid var(--border, #334155);
border-radius: 100cqmax;
font-weight: 500;
line-height: 1;
letter-spacing: 0.14em;
text-transform: uppercase;
white-space: nowrap;
will-change: transform, opacity;
}
.scr-dot {
flex: 0 0 auto;
width: 0.5em;
aspect-ratio: 1;
border: 0.16cqmin solid var(--muted, #94a3b8);
border-radius: 50%;
background: transparent;
}
/* The snap machine: presentation is pure CSS on [data-state]; the
timeline only flips the attribute. Dimming rides color, never
opacity, so it cannot fight the entrance opacity tweens. */
.scr-chip[data-state="pending"] {
border-color: color-mix(in srgb, var(--border, #334155) 80%, transparent);
background: transparent;
color: color-mix(in srgb, var(--muted, #94a3b8) 78%, transparent);
}
.scr-chip[data-state="active"] {
border-color: color-mix(in srgb, var(--scr-accent) 62%, var(--border, #334155));
background: var(--surface, #131a24);
color: var(--fg, #f8fafc);
}
.scr-chip[data-state="active"] .scr-dot {
border-color: transparent;
background: var(--scr-accent, var(--brand, #71f5a7));
}
.scr-chip[data-state="done"] {
border-color: color-mix(in srgb, var(--border, #334155) 45%, transparent);
background: transparent;
color: color-mix(in srgb, var(--muted, #94a3b8) 42%, transparent);
}
.scr-chip[data-state="done"] .scr-dot {
border-color: transparent;
background: color-mix(in srgb, var(--scr-accent, #71f5a7) 38%, transparent);
}
.scr-badge {
padding: 0.5em 0.9em;
border-color: color-mix(in srgb, var(--border, #334155) 70%, transparent);
color: color-mix(in srgb, var(--muted, #94a3b8) 88%, transparent);
font-size: 0.82em;
}
</style>
<div
id="state-chip-rail-clip"
class="scr-clip clip"
data-start="0"
data-duration="5"
data-track-index="0"
>
<div class="scr-rail" role="list"></div>
</div>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<script>
(function () {
"use strict";
// Literal id, never read off the DOM: the flattening step strips
// data-composition-id from the mounted root (see toggle-flip).
var compositionId = "state-chip-rail";
var root = document.getElementById("root");
var rail = root.querySelector(".scr-rail");
var vars =
window.__hyperframes && window.__hyperframes.getVariables
? window.__hyperframes.getVariables()
: {};
function commaList(value, max) {
return String(value == null ? "" : value)
.split(",")
.map(function (token) {
return token.trim();
})
.filter(function (token) {
return token !== "";
})
.slice(0, max);
}
var states = commaList(vars.states, 8);
if (states.length === 0) states = ["Queued", "Reading", "Drafting", "Done"];
var count = states.length;
var badges = commaList(vars.badges, 4);
var badgeStateRaw = Math.round(Number(vars.badge_state));
var badgeState = Number.isFinite(badgeStateRaw)
? Math.max(0, Math.min(count - 1, badgeStateRaw))
: Math.min(1, count - 1);
var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";
// Each enum choice routes to a DIFFERENT contract token so the
// variable stays meaningful under a theme.
var accentColors = {
green: "var(--brand, #71f5a7)",
blue: "var(--accent, #61a8ff)",
violet: "var(--accent-2, #c5a3ff)",
};
var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
? vars.accent
: "green";
root.style.setProperty("--scr-accent", accentColors[accent]);
// Build the rail: chips in machine order, badges directly after
// the badge_state chip. State 0 is active from mount.
var chips = states.map(function (label, index) {
var chip = document.createElement("div");
chip.className = "scr-chip";
chip.setAttribute("role", "listitem");
chip.setAttribute("data-state", index === 0 ? "active" : "pending");
var dot = document.createElement("span");
dot.className = "scr-dot";
dot.setAttribute("aria-hidden", "true");
var text = document.createElement("span");
text.textContent = label;
chip.appendChild(dot);
chip.appendChild(text);
return chip;
});
var badgeElements = badges.map(function (label) {
var badge = document.createElement("div");
badge.className = "scr-badge";
badge.textContent = label;
return badge;
});
chips.forEach(function (chip, index) {
rail.appendChild(chip);
if (index === badgeState) {
badgeElements.forEach(function (badge) {
rail.appendChild(badge);
});
}
});
rail.setAttribute("aria-label", states.join(", "));
// Deterministic fit: wide-tracked mono at ~0.76em per glyph, plus
// chip padding, dot, and rail gaps, all measured in em.
var railEm = (count - 1 + badges.length) * 0.8;
states.forEach(function (label) {
railEm += Array.from(label).length * 0.76 + 3.1;
});
badges.forEach(function (label) {
railEm += (Array.from(label).length * 0.76 + 2.5) * 0.82;
});
var fontCqw = Math.min(2.4, 90 / Math.max(1, railEm));
root.style.setProperty("--scr-font", "min(" + fontCqw.toFixed(3) + "cqw, 9cqh)");
// RETIME RANGE: fixed IN cascade + advance schedule, elastic
// still HOLD, optional OUT.
var OUT_BASE = 0.45;
var duration = Math.max(0.001, parseFloat(root.dataset.duration || "5"));
var OUT = exit === "none" ? 0 : Math.min(OUT_BASE, duration * 0.2);
var avail = duration - OUT;
var CHIP = Math.min(0.45, Math.max(0.2, avail * 0.15));
var entryGap = Math.min(0.08, Math.max(0.02, avail * 0.02));
var entryEnd = 0.12 + entryGap * (count - 1) + CHIP;
// Default rhythm: advances spread evenly from just after the
// cascade to ~1s before the window closes.
var firstAdvance = Math.min(Math.max(entryEnd + 0.15, 0.9), Math.max(0.2, avail - 0.6));
var lastAdvance = Math.max(firstAdvance, avail - 1.0);
var advanceCount = count - 1;
var timesList = String(vars.times == null ? "" : vars.times).split(",");
var previous = 0.15;
var advances = [];
for (var k = 0; k < advanceCount; k += 1) {
var fallback =
advanceCount > 1
? firstAdvance + (k * (lastAdvance - firstAdvance)) / (advanceCount - 1)
: firstAdvance;
var cueText = (timesList[k] || "").trim();
var cue = Number(cueText);
var start = cueText !== "" && Number.isFinite(cue) ? cue : fallback;
start = Math.max(0.15, Math.min(start, Math.max(0.15, avail - 0.45)));
start = Math.max(start, previous + 0.05);
previous = start;
advances.push(start);
}
var tl = gsap.timeline({ paused: true });
// IN: chips cascade into the rail. Explicit both-endpoints state
// so any seek is exact. Badges hold at scale 0 until their pop
// (they keep their layout slot, so the rail never reflows).
chips.forEach(function (chip, index) {
gsap.set(chip, { opacity: 0, y: "2.5cqh" });
tl.fromTo(
chip,
{ opacity: 0, y: "2.5cqh" },
{ opacity: 1, y: "0cqh", duration: CHIP, ease: "power3.out" },
0.12 + entryGap * index,
);
});
// The snap machine: pure attribute flips. GSAP records the prior
// value on first render in timeline order, so backward seeks
// restore pending / active exactly.
advances.forEach(function (start, index) {
var stateIndex = index + 1;
tl.set(chips[stateIndex], { attr: { "data-state": "active" } }, start);
tl.set(chips[stateIndex - 1], { attr: { "data-state": "done" } }, start);
});
// Badges pop beside their state as it activates.
if (badgeElements.length > 0) {
var popStart = badgeState === 0 ? entryEnd + 0.1 : advances[badgeState - 1] + 0.12;
popStart = Math.min(popStart, Math.max(0.2, avail - 0.4));
badgeElements.forEach(function (badge, index) {
gsap.set(badge, { opacity: 0, scale: 0 });
tl.fromTo(
badge,
{ opacity: 0, scale: 0 },
{ opacity: 1, scale: 1, duration: 0.4, ease: "power3.out" },
popStart + 0.14 * index,
);
});
}
// HOLD: intentionally still. The resolved machine reads as a frame.
// OUT: the whole rail leaves together.
if (exit !== "none") {
var OUT_START = duration - OUT;
tl.to(rail, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
if (exit === "up") {
tl.to(rail, { y: "-3cqh", duration: OUT, ease: "power2.in" }, OUT_START);
}
}
tl.seek(0);
window.__timelines = window.__timelines || {};
window.__timelines[compositionId] = tl;
})();
</script>
</div>
</template>
</body>
</html>
```
</VariablesExplorer>
## Install
<InstallCommand command="npx hyperframes add state-chip-rail" item="state-chip-rail" />
That writes one file: `compositions/components/state-chip-rail.html`.
## Paste it into your composition
Open `compositions/components/state-chip-rail.html` and copy what is inside into your own composition.
A component has no size or duration of its own. It takes both from the composition
you paste it into.
## Variables
Every one of these has a default, so the piece works untouched. Set the ones you
want to change on the element:
| Variable | Default | Accepts | What it does |
| --- | --- | --- | --- |
| `states` | `Queued,Reading,Drafting,Done` | string | Comma-separated chip labels in machine order (2 to 8 states). |
| `times` | `` | string | Comma-separated activation times in seconds, one per advance (state 1 onward). Blank entries use the default even rhythm. |
| `badge_state` | `1` | 0 to 7, step 1 | Index of the state the badges pop beside. |
| `badges` | `` | string | Comma-separated badge labels shown beside the badge state. Empty disables. |
| `accent` | `green` | `green`, `blue`, `violet` | Accent token family used by the active chip. |
| `exit` | `none` | `none`, `fade`, `up` | How the rail leaves the frame. Default none: the hold ends the film. |
Set them with `data-variable-values` on the element that mounts it. These are the
defaults, so this behaves exactly like the preview above until you change one:
```html wrap
<div
data-composition-id="state-chip-rail"
data-composition-src="compositions/components/state-chip-rail.html"
data-variable-values='{"states":"Queued,Reading,Drafting,Done","times":"","badge_state":1,"badges":"","accent":"green","exit":"none"}'
></div>
```
## Source
<Accordion title={`state-chip-rail.html`}>
```html
<!doctype html>
<!--
state-chip-rail: HyperFrames video primitive (product demo / state machine)
A rail of mono status chips advances a data-state snap machine on a cue
schedule. CSS alone responds to each chip's [data-state]; the timeline only
flips attributes with tl.set, so every advance is an instantaneous snap that
is exact in both seek directions (GSAP zero-duration sets record the prior
attribute value and restore it on backward seeks). The active chip is ink on
surface, done chips dim, pending chips stay hollow. Optional badges pop
beside one named state when it activates. Generalizes the flagship
agent-console status rail (cohere-north frame 04).
Variables (declared in data-composition-variables below):
- states (string, default "Queued,Reading,Drafting,Done"): comma list of
chip labels, in machine order. 2 to 8 states; extras are dropped.
- times (string, default ""): comma-separated activation times in seconds
relative to mount start, one per ADVANCE (state 1, state 2, ...).
Blank or invalid entries use the default even rhythm. Values are
clamped into the mount window and forced monotonic.
- badge_state (number, default 1): index of the state the badges pop
beside. Clamped to the states range.
- badges (string, default ""): comma list of badge labels rendered after
the badge_state chip; they pop in when that state activates. Empty
disables badges. Up to 4.
- accent (green | blue | violet, default green): active-chip accent.
green -> --brand, blue -> --accent, violet -> --accent-2.
- exit ("none" | "fade" | "up", default "none"): frame roots own
transitions; the default hold-ends-the-film.
Envelope, fixed IN with elastic HOLD (never gsap.timeScale()):
IN = chip cascade (~0.8s) then the advance schedule; the default
rhythm spreads advances so the final state lands ~1s before the
mount window closes.
HOLD = still after the last advance; nothing floats, nothing loops.
OUT = 0 when exit is "none"; else 0.45s fade / fade-up of the rail.
Mount contract: elastic root, no data-width/data-height, styled via #root
only, container-type: size, one paused timeline registered under the
literal "state-chip-rail" key. Deterministic and seek-safe: fromTo
entrances, attribute snaps via tl.set, no CSS transitions, no Date.now,
no randomness. State dimming rides color (color-mix), never opacity, so it
can never collide with the entrance opacity tweens.
-->
<html
lang="en"
data-composition-id="state-chip-rail"
data-composition-duration="5"
data-composition-variables='[
{ "id": "states", "type": "string", "role": "content", "label": "States", "description": "Comma-separated chip labels in machine order (2 to 8 states).", "default": "Queued,Reading,Drafting,Done" },
{ "id": "times", "type": "string", "role": "timing", "label": "Times", "description": "Comma-separated activation times in seconds, one per advance (state 1 onward). Blank entries use the default even rhythm.", "default": "" },
{ "id": "badge_state", "type": "number", "role": "content", "label": "Badge state", "description": "Index of the state the badges pop beside.", "default": 1, "min": 0, "max": 7, "step": 1 },
{ "id": "badges", "type": "string", "role": "content", "label": "Badges", "description": "Comma-separated badge labels shown beside the badge state. Empty disables.", "default": "" },
{ "id": "accent", "type": "enum", "role": "style", "label": "Accent", "description": "Accent token family used by the active chip.", "default": "green", "options": [{ "value": "green", "label": "Green" }, { "value": "blue", "label": "Blue" }, { "value": "violet", "label": "Violet" }] },
{ "id": "exit", "type": "enum", "role": "timing", "label": "Exit", "description": "How the rail leaves the frame. Default none: the hold ends the film.", "default": "none", "options": [{ "value": "none", "label": "None" }, { "value": "fade", "label": "Fade" }, { "value": "up", "label": "Up" }] }
]'
>
<head>
<meta charset="UTF-8" />
<title>State Chip Rail</title>
</head>
<body>
<template>
<div id="root" data-composition-id="state-chip-rail" data-duration="5" data-fps="30">
<style>
*,
*::before,
*::after {
box-sizing: border-box;
}
#root {
position: absolute;
inset: 0;
overflow: hidden;
container-type: size;
isolation: isolate;
background: var(--bg, transparent);
color: var(--fg, #f8fafc);
font-family: var(--font-mono, ui-monospace, "SF Mono", Menlo, Consolas, monospace);
pointer-events: none;
}
.scr-clip {
position: absolute;
inset: 0;
display: grid;
place-items: center;
overflow: hidden;
}
.scr-rail {
display: flex;
align-items: center;
justify-content: center;
flex-wrap: nowrap;
max-width: 94cqw;
gap: var(--scr-gap, 0.8em);
font-size: var(--scr-font, 2cqmin);
will-change: transform, opacity;
}
.scr-chip,
.scr-badge {
display: flex;
flex: 0 0 auto;
align-items: center;
gap: 0.55em;
padding: 0.62em 1.05em;
overflow: hidden;
border: 0.16cqmin solid var(--border, #334155);
border-radius: 100cqmax;
font-weight: 500;
line-height: 1;
letter-spacing: 0.14em;
text-transform: uppercase;
white-space: nowrap;
will-change: transform, opacity;
}
.scr-dot {
flex: 0 0 auto;
width: 0.5em;
aspect-ratio: 1;
border: 0.16cqmin solid var(--muted, #94a3b8);
border-radius: 50%;
background: transparent;
}
/* The snap machine: presentation is pure CSS on [data-state]; the
timeline only flips the attribute. Dimming rides color, never
opacity, so it cannot fight the entrance opacity tweens. */
.scr-chip[data-state="pending"] {
border-color: color-mix(in srgb, var(--border, #334155) 80%, transparent);
background: transparent;
color: color-mix(in srgb, var(--muted, #94a3b8) 78%, transparent);
}
.scr-chip[data-state="active"] {
border-color: color-mix(in srgb, var(--scr-accent) 62%, var(--border, #334155));
background: var(--surface, #131a24);
color: var(--fg, #f8fafc);
}
.scr-chip[data-state="active"] .scr-dot {
border-color: transparent;
background: var(--scr-accent, var(--brand, #71f5a7));
}
.scr-chip[data-state="done"] {
border-color: color-mix(in srgb, var(--border, #334155) 45%, transparent);
background: transparent;
color: color-mix(in srgb, var(--muted, #94a3b8) 42%, transparent);
}
.scr-chip[data-state="done"] .scr-dot {
border-color: transparent;
background: color-mix(in srgb, var(--scr-accent, #71f5a7) 38%, transparent);
}
.scr-badge {
padding: 0.5em 0.9em;
border-color: color-mix(in srgb, var(--border, #334155) 70%, transparent);
color: color-mix(in srgb, var(--muted, #94a3b8) 88%, transparent);
font-size: 0.82em;
}
</style>
<div
id="state-chip-rail-clip"
class="scr-clip clip"
data-start="0"
data-duration="5"
data-track-index="0"
>
<div class="scr-rail" role="list"></div>
</div>
<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
<script>
(function () {
"use strict";
// Literal id, never read off the DOM: the flattening step strips
// data-composition-id from the mounted root (see toggle-flip).
var compositionId = "state-chip-rail";
var root = document.getElementById("root");
var rail = root.querySelector(".scr-rail");
var vars =
window.__hyperframes && window.__hyperframes.getVariables
? window.__hyperframes.getVariables()
: {};
function commaList(value, max) {
return String(value == null ? "" : value)
.split(",")
.map(function (token) {
return token.trim();
})
.filter(function (token) {
return token !== "";
})
.slice(0, max);
}
var states = commaList(vars.states, 8);
if (states.length === 0) states = ["Queued", "Reading", "Drafting", "Done"];
var count = states.length;
var badges = commaList(vars.badges, 4);
var badgeStateRaw = Math.round(Number(vars.badge_state));
var badgeState = Number.isFinite(badgeStateRaw)
? Math.max(0, Math.min(count - 1, badgeStateRaw))
: Math.min(1, count - 1);
var exit = vars.exit === "fade" || vars.exit === "up" ? vars.exit : "none";
// Each enum choice routes to a DIFFERENT contract token so the
// variable stays meaningful under a theme.
var accentColors = {
green: "var(--brand, #71f5a7)",
blue: "var(--accent, #61a8ff)",
violet: "var(--accent-2, #c5a3ff)",
};
var accent = Object.prototype.hasOwnProperty.call(accentColors, vars.accent)
? vars.accent
: "green";
root.style.setProperty("--scr-accent", accentColors[accent]);
// Build the rail: chips in machine order, badges directly after
// the badge_state chip. State 0 is active from mount.
var chips = states.map(function (label, index) {
var chip = document.createElement("div");
chip.className = "scr-chip";
chip.setAttribute("role", "listitem");
chip.setAttribute("data-state", index === 0 ? "active" : "pending");
var dot = document.createElement("span");
dot.className = "scr-dot";
dot.setAttribute("aria-hidden", "true");
var text = document.createElement("span");
text.textContent = label;
chip.appendChild(dot);
chip.appendChild(text);
return chip;
});
var badgeElements = badges.map(function (label) {
var badge = document.createElement("div");
badge.className = "scr-badge";
badge.textContent = label;
return badge;
});
chips.forEach(function (chip, index) {
rail.appendChild(chip);
if (index === badgeState) {
badgeElements.forEach(function (badge) {
rail.appendChild(badge);
});
}
});
rail.setAttribute("aria-label", states.join(", "));
// Deterministic fit: wide-tracked mono at ~0.76em per glyph, plus
// chip padding, dot, and rail gaps, all measured in em.
var railEm = (count - 1 + badges.length) * 0.8;
states.forEach(function (label) {
railEm += Array.from(label).length * 0.76 + 3.1;
});
badges.forEach(function (label) {
railEm += (Array.from(label).length * 0.76 + 2.5) * 0.82;
});
var fontCqw = Math.min(2.4, 90 / Math.max(1, railEm));
root.style.setProperty("--scr-font", "min(" + fontCqw.toFixed(3) + "cqw, 9cqh)");
// RETIME RANGE: fixed IN cascade + advance schedule, elastic
// still HOLD, optional OUT.
var OUT_BASE = 0.45;
var duration = Math.max(0.001, parseFloat(root.dataset.duration || "5"));
var OUT = exit === "none" ? 0 : Math.min(OUT_BASE, duration * 0.2);
var avail = duration - OUT;
var CHIP = Math.min(0.45, Math.max(0.2, avail * 0.15));
var entryGap = Math.min(0.08, Math.max(0.02, avail * 0.02));
var entryEnd = 0.12 + entryGap * (count - 1) + CHIP;
// Default rhythm: advances spread evenly from just after the
// cascade to ~1s before the window closes.
var firstAdvance = Math.min(Math.max(entryEnd + 0.15, 0.9), Math.max(0.2, avail - 0.6));
var lastAdvance = Math.max(firstAdvance, avail - 1.0);
var advanceCount = count - 1;
var timesList = String(vars.times == null ? "" : vars.times).split(",");
var previous = 0.15;
var advances = [];
for (var k = 0; k < advanceCount; k += 1) {
var fallback =
advanceCount > 1
? firstAdvance + (k * (lastAdvance - firstAdvance)) / (advanceCount - 1)
: firstAdvance;
var cueText = (timesList[k] || "").trim();
var cue = Number(cueText);
var start = cueText !== "" && Number.isFinite(cue) ? cue : fallback;
start = Math.max(0.15, Math.min(start, Math.max(0.15, avail - 0.45)));
start = Math.max(start, previous + 0.05);
previous = start;
advances.push(start);
}
var tl = gsap.timeline({ paused: true });
// IN: chips cascade into the rail. Explicit both-endpoints state
// so any seek is exact. Badges hold at scale 0 until their pop
// (they keep their layout slot, so the rail never reflows).
chips.forEach(function (chip, index) {
gsap.set(chip, { opacity: 0, y: "2.5cqh" });
tl.fromTo(
chip,
{ opacity: 0, y: "2.5cqh" },
{ opacity: 1, y: "0cqh", duration: CHIP, ease: "power3.out" },
0.12 + entryGap * index,
);
});
// The snap machine: pure attribute flips. GSAP records the prior
// value on first render in timeline order, so backward seeks
// restore pending / active exactly.
advances.forEach(function (start, index) {
var stateIndex = index + 1;
tl.set(chips[stateIndex], { attr: { "data-state": "active" } }, start);
tl.set(chips[stateIndex - 1], { attr: { "data-state": "done" } }, start);
});
// Badges pop beside their state as it activates.
if (badgeElements.length > 0) {
var popStart = badgeState === 0 ? entryEnd + 0.1 : advances[badgeState - 1] + 0.12;
popStart = Math.min(popStart, Math.max(0.2, avail - 0.4));
badgeElements.forEach(function (badge, index) {
gsap.set(badge, { opacity: 0, scale: 0 });
tl.fromTo(
badge,
{ opacity: 0, scale: 0 },
{ opacity: 1, scale: 1, duration: 0.4, ease: "power3.out" },
popStart + 0.14 * index,
);
});
}
// HOLD: intentionally still. The resolved machine reads as a frame.
// OUT: the whole rail leaves together.
if (exit !== "none") {
var OUT_START = duration - OUT;
tl.to(rail, { opacity: 0, duration: OUT, ease: "power2.in" }, OUT_START);
if (exit === "up") {
tl.to(rail, { y: "-3cqh", duration: OUT, ease: "power2.in" }, OUT_START);
}
}
tl.seek(0);
window.__timelines = window.__timelines || {};
window.__timelines[compositionId] = tl;
})();
</script>
</div>
</template>
</body>
</html>
```
</Accordion>
{/* hf:generated-footer */}
Tagged `motion-primitive` `product-demo` `state-machine` `status` `chips` `rail`.
## Related topics
- [Browse the complete Catalog](/catalog)
- [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
- [Build a richer composition](/go-further)