Documentation Request: paginated ref

[SumNeuron]

In your example of a todo app, binding the entire todo list is not a problem as if it were a product app, a user would likely never have hundreds if not thousands of todos.

So, it would be relevant to have a paginated example with an associated getter for the page.

[posva]

added to vuejs/vuefire#145

[posva]

btw, you can use computed properties or watcher to automatically rebind