$ yarn
$ yarn start
- Page updates in Next.js route transitions are performed by unmounting the previous page component and mounting the next one.
- In
_app.js
, you have the ability to render additional content besides just the current page component (in fact you could skip rendering the page component entirely if you wanted). - So, this demo renders a component in
_app.js
that keeps track of the previously rendered page components. When the latest page is rendered and given amodal
query param, the page is pushed onto a stack instead of completely replacing the previous one.