Simple KO binding for getting context data from within a VM

ko.binding.js

    ko.bindingHandlers.console = {
        init: function (element, valueAccessor,allBindingsAccessor) {
            console.info('ko.console:',valueAccessor());
        },
        update: function (element, valueAccessor, allBindingsAccessor) {
            console.info('ko.console:',valueAccessor());
        }
    };

usage.html

<div data-bind="console: $parent.foo()"></div>