如何在用于编辑HTML的Javascript组件中实现视图-模型分离?

I need to build an in-browser WYSI(more-or-less)WYG editor for a specific subset of HTML. This requires that the model HTML elements can be decorated with additional markup for editing support. Possibly, some model HTML elements will have to be replaced entirely for the purpose of editing.I need to build an in-browser WYSI(more-or-less