Function getAttr

packages/core/src/compiler/timingCompiler.ts:62–71

(tag: string, attr: string)

// ── Helpers ──────────────────────────────────────────────────────────────

function getAttr(tag: string, attr: string): string | null {
  // `(?<![\w-])` anchors the attribute name to a fresh start. Without it,
  // `getAttr(tag, "id")` matches the trailing `id="…"` inside `data-hf-id="…"`
  // (and "src" inside `data-src`, etc.) and returns a phantom value. That bug
  // made compileTag believe a Studio-stamped `data-hf-id`-only element already
  // had an `id`, so it skipped its `hf-video-N` injection — leaving the element
  // with no real `el.id`, which the render pipeline keys off of (blank wash).
  const match = tag.match(new RegExp(`(?<![\\w-])${attr}=["']([^"']+)["']`));
  return match ? (match[1] ?? null) : null;
}

function hasAttr(tag: string, attr: string): boolean {
  return new RegExp(`\\s${attr}(?:\\s|=|>|/)`).test(tag);