Function handleSetAttribute

packages/sdk/src/engine/mutate.ts:372–398

(
  parsed: ParsedDocument,
  ids: HfId[],
  name: string,
  value: string | null,
)

}

function handleSetAttribute(
  parsed: ParsedDocument,
  ids: HfId[],
  name: string,
  value: string | null,
): MutationResult {
  validateSetAttribute(name, value);
  const result: MutationResult = { forward: [], inverse: [] };
  for (const id of ids) {
    const el = resolveScoped(parsed.document, id);
    if (!el) continue;
    const oldValue = el.getAttribute(name);
    const path = attrPath(id, name);
    if (value !== null) {
      el.setAttribute(name, value);
      const p = scalarChange(path, oldValue, value);
      result.forward.push(p.forward);
      result.inverse.push(p.inverse);
    } else if (oldValue !== null) {
      el.removeAttribute(name);
      const p = scalarDelete(path, oldValue);
      result.forward.push(p.forward);
      result.inverse.push(p.inverse);
    }
  }
  return result;
}

// fallow-ignore-next-line complexity
function handleSetTiming(