visitIndex method

  1. @override
dynamic visitIndex(
  1. IndexExpression node, {
  2. bool computeAsPattern = false,
})

Implementation

@override
visitIndex(IndexExpression node, {bool computeAsPattern = false}) {
  dynamic val;
  try {
    if (node.optional) {
      final obj = getValueFromExpression(node.object);
      if (_isNullish(obj)) return computeAsPattern ? null : jsUndefined;
      final property = getValueFromExpression(node.property);
      return _getObjectPropertyValue(obj, property,
          computeAsPattern: computeAsPattern);
    }
    val = visitObjectPropertyExpression(
        node.object, getValueFromExpression(node.property),
        computeAsPattern: computeAsPattern);
  } on InvalidPropertyException {
    //ignore since obj['prop'] is fine even when prop does not exist. We just return null in that case
  }
  return val;
}