(A)synchronous Behavior

Most events are handled synchronously, e.g., click, key, or mouse. But there are a few exceptions that are handled asynchronously, e.g., load. Synchronous means that the sequence of invocations is the same as the sequence of their creations. Clicking on Button A, B, and then C leads to the invocation of A's, B's, and then C's event handler in exactly this sequence. In contrast, asynchronous eve...