city-picker | 下拉面板式省市区三级联动jquery插件，视觉更清爽，交互体验更友好。 | Frontend Framework library

I'm looking into using react-select as a selector for a city-picker, where users can pick 1 or multiple cities to filter some data on. Here is a screenshot of it rendered in my page:

The city list can be large, and I don't want the selector to grow outside of its blue container if a large number are selected at once. Here is what happens when I simulate that now:

I'm not a huge fan of that! One alternative I can think of is to render "4 cities selected" instead of the entire list. This will have a predictable size on the page.

How can this be done with react-select?