Function addParent

packages/core/css/lib/parse/index.ts:567–592

* Adds non-enumerable parent node reference to each node.

(obj, parent?)

 */

function addParent(obj, parent?) {
	var isNode = obj && typeof obj.type === 'string';
	var childParent = isNode ? obj : parent;

	for (var k in obj) {
		var value = obj[k];
		if (Array.isArray(value)) {
			value.forEach(function (v) {
				addParent(v, childParent);
			});
		} else if (value && typeof value === 'object') {
			addParent(value, childParent);
		}
	}

	if (isNode) {
		Object.defineProperty(obj, 'parent', {
			configurable: true,
			writable: true,
			enumerable: false,
			value: parent || null,
		});
	}

	return obj;
}