Function readDecls

packages/sdk/src/engine/variableModel.ts:17–30

Parse the variable declaration array, or null when absent/invalid.

(document: Document)

/** Parse the variable declaration array, or null when absent/invalid. */
function readDecls(document: Document): { htmlEl: Element; arr: VariableDecl[] } | null {
  const htmlEl = getHtmlEl(document);
  if (!htmlEl) return null;
  const raw = htmlEl.getAttribute("data-composition-variables");
  if (!raw) return null;
  let parsed: unknown;
  try {
    parsed = JSON.parse(raw);
  } catch {
    return null;
  }
  if (!Array.isArray(parsed)) return null;
  return { htmlEl, arr: parsed as VariableDecl[] };
}

function indexOfId(arr: VariableDecl[], id: string): number {
  return arr.findIndex((v) => typeof v === "object" && v !== null && v.id === id);