Avoiding a javascript race condition

Question

Here\'s the scenario:

My users are presented a grid, basically, a stripped down version of a spreadsheet. There are textboxes in each row in the grid. When they ch

Answer 1

When working with async data sources you can certainly have race conditions because the JavaScript process thread continues to execute directives that may depend on the data which has not yet returned from the remote data source. That's why we have callback functions.

In your example, the call to the validation code needs to have a callback function that can do something when validation returns.

However, when making something with complicated logic or trying to troubleshoot or enhance an existing series of callbacks, you can go nuts.

That's the reason I created the proto-q library: http://code.google.com/p/proto-q/

Check it out if you do a lot of this type of work.