Vue-router router-view rendering issu

use vue-router to do a simple route, mainly to change the list of secondary menus on the right by clicking on the left menu, and render the middle theme content when you click the secondary menu. Both router-view in the
code are rendered as secondary menu lists. I still don"t know how to solve the problem when I"m a beginner in vue,. For the
code, please click the link below
https://jsfiddle.net/sgkto482/

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Mar.31,2021

ide/essentials/named-views.html" rel=" nofollow noreferrer "> https://router.vuejs.org/zh/g.

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