jQuery style watcher/thrower

jQStyleThrower.js

jQuery.throwOnStyle = (function($) {

    var watchers = [];

    $.style = (function(_style) {
        return function(elem, name, value) {
            for (var i = 0, l = watchers.length; i < l; ++i) {
                var w = watchers[i];
                if (
                    (w.styleMatcher.test ?
                        w.styleMatcher.test(name) :
                        w.styleMatcher === name)
                    &&
                    (w.valueMatcher.test ?
                        w.valueMatcher.test(value) :
                        w.valueMatcher === value)
                    && $(elem).is(w.selector)
                ) {
                    throw new Error('Matched! ' + w.selector + ':: ' + name + ':' + value);
                }
            }
            return _style.apply(this, arguments);
        };
    }($.style));

    return function(selector, styleMatcher, valueMatcher) {
        var addedAt = watchers.push({
            selector: selector,
            styleMatcher: styleMatcher,
            valueMatcher: valueMatcher
        }) - 1;
        return function() {
            watchers.splice(addedAt, 1);
        };
    };

}(jQuery));

jQStyleThrowerExample.js

// WARNING: This will potentially be very slow -- use sparingly, even when debugging.

jQuery.throwOnStyle('body', 'color', 'red');
  // Throws Exception if someone tries to set the BODY element's color to red via jQuery's CSS API
  
jQuery.throwOnStyle('.something.foo', /^(?:background|backgroundColor)$/, /purple/);
  // Throws Exception if someone tries to set a background or backgroundColor to a value containing
  // purple on any element that complies with the CSS selector, '.something.foo'