Setting an optional parameter to undefined generates a link with `undefined` in the path instead of ommiting the paramater, like in vue- router@3 · Issue #855 · vuejs/router · GitHub
Optional route param in Vue Router - Codesandbox
Using Vue 3's Router in Practice
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A Beginner's Guide to Vue Router — SitePoint
UI API | Vue CLI
vue.js - vuejs: router-link params is empty - Stack Overflow
How to Use Vue Router 4. One of the most powerful features of… | by Naji0329 | Oct, 2023 | Medium
Optional parameters are dropped in named nested routes · Issue #2110 · vuejs /vue-router · GitHub