![Complete Vue Router 4 Guide: Basics, Programmatic Routing, Navigation Guards, Transition Effects and Composition API | by OnlyKiosk Dev Tech | Level Up Coding Complete Vue Router 4 Guide: Basics, Programmatic Routing, Navigation Guards, Transition Effects and Composition API | by OnlyKiosk Dev Tech | Level Up Coding](https://miro.medium.com/v2/resize:fit:2000/1*V8nTsjsmMA_I2IxISPASKw.png)
Complete Vue Router 4 Guide: Basics, Programmatic Routing, Navigation Guards, Transition Effects and Composition API | by OnlyKiosk Dev Tech | Level Up Coding
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
![Complete Vue Router 4 Guide: Basics, Programmatic Routing, Navigation Guards, Transition Effects and Composition API | by OnlyKiosk Dev Tech | Level Up Coding Complete Vue Router 4 Guide: Basics, Programmatic Routing, Navigation Guards, Transition Effects and Composition API | by OnlyKiosk Dev Tech | Level Up Coding](https://miro.medium.com/v2/resize:fit:1400/1*Jpk1mORsAIf_X2a2v3WZ4A.png)