_default.page.*

The _default.page.{server|client|route}.js files allow us to define hooks & settings in a global application-wide way.

They are not adjacent to any .page.js file: defining a _default.page.js is forbidden.

_default.page.{server|client}.js

The hooks & settings we export in _default.page.server.js and _default.page.client.js apply as default to all pages.

There can be several _default.{server|client}.js files:

marketing/renderer/_default.page.server.js
marketing/renderer/_default.page.client.js
marketing/pages/index.page.js
marketing/pages/about.page.js
marketing/pages/jobs.page.js
admin-panel/renderer/_default.page.server.js
admin-panel/renderer/_default.page.client.js
admin-panel/pages/index.page.js

The marketing/_default.page.* files apply as default to the marketing/**/*.page.js files, while the admin-panel/_default.page.* files apply as default to the admin-panel/**/*.page.js files.

_default.page.route.js

The _default.page.route.js exports special hooks that allows us to control the routing process, more infos at _default.page.route.js.