JavaScript synchronization options

Question

I was wondering whenever exists a solution to perform synchronization in JavaScript code. For example I have the following case: I\'m trying to cache some response values from A

Answer 1

Javascript is inherently single-threaded, at least for the normal browser environment. There will never two simultaneous executions of scripts accessing the same document. (the new Javascript worker threads might be an exception here, but they're not meant to access documents at all, just to communicate by message passing).