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James RussoandClaude Opus 4.6
18de86e4bd
* fix(player): handle Infinity duration from runtime gracefully When compositions have repeating animations without data-duration, the runtime sends durationInFrames: Infinity. The player now ignores non-finite duration values instead of displaying "Infinity:NaN" in the controls. formatTime also returns "0:00" for non-finite inputs. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat(lint): add data-duration and Math.ceil overshoot rules - Add root_composition_missing_data_duration warning when the root composition element is missing data-duration, which causes the runtime to infer Infinity for loop-inflated timelines. - Add gsap_repeat_ceil_overshoot warning that catches repeat: Math.ceil(d/c)-1 patterns which overshoot the intended duration. Recommends Math.floor instead. - Fix gsap_infinite_repeat fixHint to suggest Math.floor (not Math.ceil). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix(player): wait for injected runtime before declaring ready When the player auto-injects the runtime script (because the composition has GSAP timelines but no runtime), it would immediately declare ready on the next probe cycle — before the runtime script finished loading from CDN. This caused play() to send a postMessage that nobody received, making autoplay silently fail. Now the probe waits for the runtime bridge (__hf or __player) to appear before proceeding to the ready state. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 (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