[1.9] Adding jQuery.fx.start as a hook point - Fixes #12803

[gnarf]

The idea is to make "replacing" this as simple has having to implement the following logic:

var timerId;

jQuery.fx.start = function() {
    // could actually be called multiple times, so track your own state
    if ( !timerId ) {
        timerId = setInterval( jQuery.fx.tick, jQuery.fx.interval );
    }
};

jQuery.fx.stop = function() {
    clearInterval( timerId );
    timerId = null;
};

Sadly:

Sizes - compared to master @ 877306738f931a711c41d907e69fc8930f985830
    263723       (+66)  dist/jquery.js                                         
     91771       (+35)  dist/jquery.min.js                                     
     32682       (+12)  dist/jquery.min.js.gz   

[gibson042]

👍

Also, this might benefit from replacing all those jQuery.fx.propertyN = valueN; with jQuery.fx = { propertyN: valueN, ... }; (unless you think jQuery.fx needs to be Tween.prototype.init, in which case jQuery.extend( jQuery.fx, { propertyN: valueN, ... }); is still an option).