选择选项单击后，如何让我的页面上的内容更新？

I have a feed. In that feed is a list of "posts". The feed can be updated with posts from different cities by selecting a new city from a list of select options. I use the Onymos service for my backend In my header I have interpolated the name of the default city in a title which is "new york". In the constructor I call a service I made that is set to populate the feed with new york posts on page load and update the feed on new city select.I have a feed. In that feed is a list of "posts