Unwanted Reload Full Page

[mdrakash]

i am learning vue router. in my example.js file i push a route when call my function. in the component change anything page will full reload when i use this example.js file.

you can see here https://stackblitz.com/edit/vitejs-vite-iu7psv?file=src%2Fcomponents%2FLogin.vue

change anything in login.vue file its reload full page.
how can i fix this issue