Function findEl

spec/gridstack-spec.ts:12–14

(id: string)

    return grid.engine.nodes.find(n => n.id === id)!;
  };
  let findEl = function(id: string): GridItemHTMLElement {
    return find(id).el!;
  };

  // grid has 4x2 and 4x4 top-left aligned - used on most test cases
  let gridHTML =