default.js
The default.js
file is used to render a fallback within Parallel Routes when Next.js cannot recover a slot's active state after a full-page load.
During soft navigation, Next.js keeps track of the active state (subpage) for each slot. However, for hard navigations (full-page load), Next.js cannot recover the active state. In this case, a default.js
file can be rendered for subpages that don't match the current URL.
Consider the following folder structure. The @team
slot has a settings
page, but @analytics
does not.
When navigating to /settings
, the @team
slot will render the settings
page while maintaining the currently active page for the @analytics
slot.
On refresh, Next.js will render a default.js
for @analytics
. If default.js
doesn't exist, a 404
is rendered instead.
Additionally, since children
is an implicit slot, you also need to create a default.js
file to render a fallback for children
when Next.js cannot recover the active state of the parent page.
Props
params
(optional)
An object containing the dynamic route parameters from the root segment down to the slot's subpages. For example:
Example | URL | params |
---|---|---|
app/[artist]/@sidebar/default.js | /zack | { artist: 'zack' } |
app/[artist]/[album]/@sidebar/default.js | /zack/next | { artist: 'zack', album: 'next' } |
Learn more about Parallel Routes
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