@doidor/markbook-adapter-shared

Browser-side runtime helpers used by the Markbook React adapter (@doidor/markbook-adapter-react). The Vue and Web Components adapters are planned (see ADR-0028) and will reuse this package once built.

This package is pure DOM — no Node APIs, no framework runtime imports — so it bundles cleanly into an adapter's default (browser) entry without dragging Node-only code across the two-entry split (see ADR-0005 / ADR-0026). Each adapter implements its own mount() (and React additionally setupControls), but the placeholder / shadow-root / CSS-injection plumbing is identical, so it lives here once.

Exports

| Symbol | Purpose | | --- | --- | | StoryParameters | { layout?, background? } — per-story display options. | | BaseMountOptions | The framework-agnostic subset of every adapter's MountOptions (isolation, parameters, css, cssId). Adapters extend it with args / decorators. | | applyParameters(el, params) | Swap the markbook-story--<layout> class + optional background on the placeholder. | | resolveMountTarget(el, isolation) | Return the placeholder, or a .markbook-shadow-host div inside an open shadow root when isolation: 'shadow'. | | injectCss(target, css, cssId) | Inject the embed bundle's CSS into the shadow root or document.head, deduped by cssId. |

This is an internal Markbook implementation package; its surface is consumed by the official adapters and is not intended as a standalone public API.