# operator []= method

void operator []= (dynamic index, E value)

Sets the value associated with `property` on the proxied JavaScript object.

The type of `property` must be either String or num.

## Implementation

    void operator []=(index, E value) {
      // TODO(justinfagnani): fix the semantics for non-ints
      // dartbug.com/14605
      if (index is num && index == index.toInt()) {
        _checkIndex(index);
      }
      super[index] = value;
    }