knockoutjs：Example 1: 基本的な書式：The custom binding

基本的な書式なので動きは無し。

<body>
<div data-bind="yourBindingName: someValue"> </div>

<script type="text/javascript">
ko.bindingHandlers.yourBindingName = {
	init: function(element, valueAccessor, allBindingsAccessor, viewModel) {
		// This will be called when the binding is first applied to an element
		// Set up any initial state, event handlers, etc. here
	},
	update: function(element, valueAccessor, allBindingsAccessor, viewModel) {
		// This will be called once when the binding is first applied to an element,
		// and again whenever the associated observable changes value.
		// Update the DOM element based on the supplied values here.
	}
};
</script>
</body>

PCスキルの小技・忘却防止メモ - PCスキルの小技・忘却防止メモのまとめ（wiki）