javascript - ui-router AngularJS url displays normally and the page does not change?

Question

Learn AngularJS's ui-router
Automatically add list.html to index.html. Click the a tag in list.html to jump to detail.html. Here is the code
Why click the a tag in list.html no response?

The url is correct and no error is reported

Answer 1

I made a mistake. Not a sub-route.