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Miao YangandClaude Opus 4.8
9ccae86372
gsap_css_transform_conflict existed but missed the most common real-world
shape (a label centered with CSS translateX(-50%) plus a GSAP xPercent that
stacks to -100% in the capture path), for three independent reasons:
- selector matching was exact-string, so a scoped/grouped GSAP selector
("#root .label, #root .sub") never matched a CSS class rule (.label)
- the acorn parser only captures timeline-rooted calls (tl.to/tl.set), so a
standalone gsap.set("#root .label", { xPercent: -50 }) was invisible to it
- lintProject read compositions/ non-recursively, so per-frame compositions
in compositions/frames/*.html were never linted at all
Fix: token-decompose grouped/descendant/compound selectors and match by
id/class against CSS transform rules; additionally scan standalone gsap.*
transform calls; and recurse into compositions/ subdirectories so frame
sub-compositions are linted.
Adds unit tests (grouped gsap.set repro, descendant tl.to, negative case) and
an end-to-end lintProject test that writes compositions/frames/04-*.html and
asserts the conflict is reported there.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@hyperframes/core
Types, parsers, generators, compiler, linter, runtime, and frame adapters for the Hyperframes video framework.
Install
npm install @hyperframes/core
Most users don't need to install core directly — the CLI, producer, and studio packages depend on it internally.
What's inside
| Module | Description |
|---|---|
| Types | TimelineElement, CompositionSpec, Asset, canvas dimensions, defaults |
| Parsers | parseHtml — extract timeline elements from HTML; parseGsapScript — parse GSAP animations |
| Generators | generateHyperframesHtml — produce valid Hyperframes HTML from a composition spec |
| Compiler | compileTimingAttrs — resolve data-start / data-duration into absolute times |
| Linter | lintHyperframeHtml — validate Hyperframes HTML (missing attributes, overlapping tracks, etc.) |
| Runtime | IIFE script injected into the browser — manages seek, media playback, and the window.__hf protocol |
| Frame Adapters | Pluggable animation drivers (GSAP, Lottie, CSS, or custom) |
Frame Adapters
A frame adapter tells the engine how to seek your animation to a specific frame:
import { createGSAPFrameAdapter } from "@hyperframes/core";
const adapter = createGSAPFrameAdapter({
getTimeline: () => gsap.timeline(),
compositionId: "my-video",
});
Implement FrameAdapter for custom animation runtimes:
import type { FrameAdapter } from "@hyperframes/core";
const myAdapter: FrameAdapter = {
id: "my-adapter",
getDurationFrames: () => 300,
seekFrame: (frame) => {
/* seek your animation */
},
};
Parsing and generating HTML
import { parseHtml, generateHyperframesHtml } from "@hyperframes/core";
const { elements, metadata } = parseHtml(htmlString);
const html = generateHyperframesHtml(spec);
Linting
import { lintHyperframeHtml } from "@hyperframes/core/lint";
const result = lintHyperframeHtml(htmlString);
// result.findings: { severity, message, elementId }[]
Documentation
Full documentation: hyperframes.heygen.com/packages/core
Related packages
@hyperframes/engine— rendering engine that drives the browser@hyperframes/producer— full render pipeline (capture + encode)hyperframes— CLI