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Miguel Angel Simon Sierra
20e25341e9
anime.js v4.5.0 does not read an element's CSS-cascaded `transform` value
when resolving an implicit "from" for decomposed transform sub-properties
(translateX/Y, scale, scaleX/Y, rotate) authored without an explicit
`[from, to]` array. It silently defaults to identity instead, so any
element relying on a stylesheet rule like
`.node { transform: translate(-50%, -50%) scale(0); }` to start hidden
renders at (or near) its final position/scale from the very first frame.
Confirmed via isolated puppeteer reproduction: this is baked into anime's
internal tween node (`_fromNumber`) at `.add()` time, independent of seek
order or priming.
Correct each affected tween's `_fromNumber`/`_number` with the true
CSS-cascaded value (decomposed via DOMMatrixReadOnly) before the instance's
first-ever seek, in the existing per-instance priming pass. Verified
against registry/blocks/flowchart and registry/examples/kinetic-type
(same "content resolves ahead of schedule" defect family from the U-final
adjudication) with real render+compare-item PSNR improvement.
@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