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Lirian SuandClaude Opus 4.7
69b7965446
`injectInterceptor` used `String.prototype.replace(target, replacement)` to inject the runtime `<script>` before `</head>`. The replacement string is a substitution template — `$&` expands to the matched substring, and the minified runtime IIFE contains legitimate `$&` sequences (e.g. `if(te&&$&!y.hasAttribute(...))`), so every `$&` in the body was silently rewritten to `</head>`, producing `Unexpected token '<'` SyntaxErrors and breaking every timeline in the bundle. Switch to the function-replacer form so the runtime body is passed through verbatim. Add a regression test that diffs the bundled runtime body against `getHyperframeRuntimeScript()` and asserts only one `</head>` survives in the document — the test exercises the `<head>`-present injection path (the only branch that uses the substitution template; the no-`<head>` fallback uses slice+concat and was unaffected). Only the bundler is affected — `producer/fileServer.ts` already uses the function form via `injectScriptsIntoHtml` in `htmlDocument.ts`, so render output was correct. Snapshot, preview, studio, layout, and validate all consume `bundleToSingleHtml` and were broken before this fix. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 (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