docs: documents middleware matcher #40180
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### 馃摉 What's in there? Middleware matchers are powerful, but very few people realized it, because they are not really documented. This PR tries to bring more clarity, and includes a more advanced example. The example shows how to exclude several pages (no `/static`, no `/public`), but also allow specific page in excluded paths (`/public/disclaimer`) ### 馃И How to test? Run the example: `pnpm next dev examples/middleware-matcher`, then browse to http://localhost:3000 The first 3 links should not match, the last 3 ones should. Don't forget to clear your localhost cookies if you change the middleware code. ### 馃啓 Note to reviewers Using session cookies to pass information from middleware to the rendered page is not great, because `document.cookie` is not available during SSR, and because cookies persist when refreshing the page (making it hard to try different matchers) However, I couldn't find a simpler way to convey the information from the middleware to the page, and I meant to have something visual. The other option is to use response headers and curl commands, but...
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馃摉 What's in there?
Middleware matchers are powerful, but very few people realized it, because they are not really documented.
This PR tries to bring more clarity, and includes a more advanced example.
The example shows how to exclude several pages (no
/static, no/public), but also allow specific page in excluded paths (/public/disclaimer)馃И How to test?
Run the example:
pnpm next dev examples/middleware-matcher, then browse to http://localhost:3000The first 3 links should not match, the last 3 ones should.
Don't forget to clear your localhost cookies if you change the middleware code.
馃啓 Note to reviewers
Using session cookies to pass information from middleware to the rendered page is not great, because
document.cookieis not available during SSR, and because cookies persist when refreshing the page (making it hard to try different matchers)However, I couldn't find a simpler way to convey the information from the middleware to the page, and I meant to have something visual. The other option is to use response headers and curl commands, but...