This is a #19325 reconfigured to support a loader passed in via a `loader` prop on the Image component, rather than using a config-based approach.
The idea is that applications wanting to use a custom loader will create a wrapper element for the image component that incorporates that loader. See a simple example of this pattern in the integration tests.
This solution is similar to the one prototyped by @ricokahler in #20213 and described at https://github.com/vercel/next.js/issues/18606#issuecomment-720149156
---
Closes#19325Fixes#18606
Currently pages with `notFound: false` from `getServerSideProps` behave the same as `notFound: true`, i.e. just having the key is enough to result in a 404. This fixes the check in render.tsx and adds tests for it.
This pull request correctly assigns boolean attributes for `<script />` to match the element as it is created by a server-side render.
Prior to this pull request, we'd double-execute `<script>` tags with the `async`, `defer`, or `nomodule` property.
---
Fixes#9070
**What's the problem this PR addresses?**
`@next/mdx` adds the webpack loader `@mdx-js/loader` without resolving it to an absolute path
Depends on https://github.com/vercel/next.js/pull/17606
**How did you fix it?**
`require.resolve` the webpack loader before adding it
This PR is a small follow-up to #14705. It saves Next.js users from falling into a [pretty nasty trap](https://github.com/nodejs/node/issues/36620) in which I ended up last Friday. It took more than two days to investigate what was going on, so I hope I'm the last person who’s doing it 😅
Next.js-specific MWE: https://github.com/kachkaev/hanging-response-in-next-via-redirect-plus-compression (needs to be ran locally using Node 14.0.0+).
> <img width="521" alt="Screenshot 2020-12-24 at 20 50 00" src="https://user-images.githubusercontent.com/608862/103105989-a9b8dc00-4629-11eb-9be3-5108755604bf.png">
To reproduce the bug I’m fixing:
1. Pick a large http body size (64 or 128 KB)
1. Check _Call res.end() after res.redirect() in /api/redirect_
1. Navigate to a heavy page or an api handler via redirect
1. Observe that the http response is never finished.
If you set `compress` to `false` in `next.config.js` or pick a small payload size (< `zlib.Z_DEFAULT_CHUNK` after compression), the bug will not be observed. This is explained by the use of `res.on("drain", ...)` [by the `compression` package](3fea81d0ea/index.js (L193-L218)). The package itself is not the reason for an issue though, it seems to be in the Node’s built-in `http` package.
I’m happy to provide more info or GitHub CI to the MWE if needed. I was also thinking of adding some Next.js-specific testing, but could not come up with a compact and clear test plan. Happy to do this if there are any ideas.
cc @botv (author of #14705)
Follow-up to https://github.com/vercel/next.js/pull/20628 this ensures `isReady` is not initially true when the query isn't present but the page is an automatically statically optimized dynamic route
Currently there is no way to add multiple meta tags with the same name attribute to the head of a page. This PR modifies the Head component to allow multiple meta tags with the same name if they have unique keys.
This is important for integrating with certain services like Google Scholar and Swiftype.
Fixes#10183
This PR fixes a bug where `next/babel` would accidentally enable development transforms for a production build (`next build`).
This is tested by the two updated unit tests (which removed a workaround for this bug, and one now properly enables dev transforms).
---
Fixes#18929Fixes#19001
x-ref #19046
x-ref #17032
This PR fixes a bug where we'd accidentally pass-through the user-provided `srcSet` if the image was lazy, just to then replace it when we hydrate.
---
Fixes#19041
This bundles ally.js into Next.js itself to upgrade a dependency they have pinned.
I tried every other major focus trap solution, even those used by some modal libraries, and they all failed.
`ally.js` is the only library that can do it correctly, so we're going to stick with it.
I also removed the `maintain/disabled` as we have a backdrop that would effectively result in the same. This reduces CPU strain.
---
Fixes#19893Fixes#14369Closes#14372
This pull request adjusts our experimental scroll restoration behavior to use `sessionStorage` as opposed to `History#replaceState` to track scroll position.
In addition, **it eliminates a scroll event listener** and only captures when a `pushState` event happens (thereby leaving state that needs snapshotted).
These merely adjusts implementation detail, and is covered by existing tests:
```
test/integration/scroll-back-restoration/
```
---
Fixes#16690Fixes#17073Fixes#20486
This ensures we render the locale domain on the `href` when using `next/link` previously the provided `href` was stilling being rendered which differed from the resulting `href` that was navigated to.
Fixes: https://github.com/vercel/next.js/issues/20612
This pull request adds an `elements.delete` operation to the `useIntersection`'s cleanup function: `unobserve`.
Without this delete operation, next.js holds onto an unreachable reference of every observed element indefinitely (automatically every Link and Image is observed, so that means every rendered Link and Image element adds to the leak). I found this memory leak when building out an infinite feed in next.js with thousands of Link elements.
The final code block of the `unobserve` function body:
```tsx
// Destroy observer when there's nothing left to watch:
if (elements.size === 0) {
observer.disconnect()
observers.delete(id)
}
```
Is effectively unreachable without this delete operation, as the `elements` map will never decrease in size as it is currently. This means that there will always be at least one IntersectionObserver instance in memory if useIntersection has been used once, regardless of if there are currently any components still using the hook.
This pull request makes `Router#push` and `Router#replace` function identically to `<Link />`, i.e. reset scroll when the new render is complete.
Users can opt out of this new behavior via:
```tsx
const path = '/my-page'
router.push(path, path, { scroll: false })
```
---
Fixes#3249
This ensures we detect domain specific locales and redirect them client-side. Tests have been added in the `i18n` suite to ensure the domain redirect is applied correctly during a client-side navigation
Fixes: https://github.com/vercel/next.js/issues/19174
This refactors to instead of throwing a specific error when a SSG data route 404s, we return it through props and render the 404 outside of the error handling flow. No additional tests have been added as existing tests should cover this.
Closes: https://github.com/vercel/next.js/issues/19243
This moves the scroll reset behavior to happen synchronously with the DOM commit, instead of a few ticks after the render completes.
This is necessary for components that read scroll state on mount.
---
Fixes#6462
This ensures the default path used for the `next/image` component includes the `basePath` when configured. Additional tests have also been added to ensure the image component is working correctly with `basePath` configured.
Fixes: https://github.com/vercel/next.js/issues/19711
This fixes `next/image` to properly ignore inherited styles applied to the `img` tag by a parent element.
Image styling should **always** be done by a wrapper element—not to the image itself!
---
Fixes#19817Fixes#19964
Fixes: https://github.com/vercel/next.js/issues/15278
> Bug report
> When using next dev with emacs, as you develop, emacs creates symbolic link files starting with .# as lock files. Next.js seems to attempt to load these but fails, spewing out errors constantly.
Prevents dev server from crashing when emacs creates lockfiles
tested with:
- GNU Emacs 27.1
- OSX 11.1
- Node v15.4.0
This removes `import type` usage from our core files since `import type` requires a higher TypeScript version than currently expected.
Fixes: https://github.com/vercel/next.js/issues/19300
This makes sure we don't generate the wrong locale source variant for the rewrite requiring a `/` on the end which won't ever be added causing the rewrite to never match. Additional tests have been added to ensure this specific rewrite is working correctly.
Fixes: https://github.com/vercel/next.js/issues/20508
This makes sure the query isn't dropped when doing a history navigation with i18n. Additional tests have been added to ensure this is working correctly as well.
Fixes: https://github.com/vercel/next.js/issues/20212
This ensures we show an error for string values for `revalidate` since we currently don't handle these and instead it results in `revalidate: false` being used. This also adds tests for our `revalidate` checks to ensure they are triggered correctly and not triggered for valid values.
x-ref: https://github.com/vercel/next.js/issues/20310
This makes sure redirects to the index route properly end with a trailing slash or don't based on the `trailingSlash` config to ensure an additional redirect doesn't need to take place un-necessarily.
Fixes: https://github.com/vercel/next.js/issues/19405
This ensures the pages-manifest only includes forward slashes and not backslashes when adding i18n page references, this also adds tests ensuring we don't regress on this in the i18n-support test suite.
Fixes: https://github.com/vercel/next.js/issues/20330
There's currently two bugs with the font optimization, but we'd really like to ship a stable version.
To unblock the stable release, we're **temporarily** reflagging this. It'll be unflagged on canary again!
Solves the following warning:
> (node:1484) [DEP_WEBPACK_MAIN_TEMPLATE_REQUIRE_FN] DeprecationWarning: MainTemplate.requireFn is deprecated (use "__webpack_require__")
Adds brief summary in Getting Started to explain the `pages/api` functionality. The intention here is reduce confusion to new users of Next.js as to what `pages/api` is and how it works.
This makes sure the `locale` doesn't cause the wrong `href` to be resolved, this also ensures route specificity is correct when loading dynamic routes in production mode.
Fixes: https://github.com/vercel/next.js/issues/19747
Currently if sizes is not defined, Next.js is setting sizes as:
```
(max-width: 640px) 640px, (max-width: 750px) 750px, (max-width: 828px) 828px, (max-width: 1080px) 1080px, (max-width: 1200px) 1200px, (max-width: 1920px) 1920px, (max-width: 2048px) 2048px, 3840px'
```
This pull request will make sizes be `100vw` by default, which will allow us to download "smaller" images than what's currently happening.
In a demo app I have, the difference is between downloading 488KB vs 1.4MB (in images)
Adds an err.sh link to the production build missing message. Also clears up `valid` as `production`.
Also fixes an edge case where an unhelpful error would be thrown because we checked for `.next` instead of `.next/BUILD_ID`
Added the out directory location as the list line during export to make sure people know where the files are output.
Fixes#19778Fixes#19788
## Why
Some users prefer to use a custom server implementation that handles body parsing. If they do this, they have no way to opt out of all body parsing in API Routes. Requests with bodies die if next's `bodyParser` is not disabled. Requests just hang forever.
Instead of adding [this config](https://nextjs.org/docs/api-routes/api-middlewares#custom-config) to every API Route, we do a simple check to avoid parsing the body twice.
Fixes#8315Fixes#7960
Nitpicky change, but the version string contained a double `|`, implying that there might be an empty value between `process.env.__NEXT_VERSION` and the environment variables.
* make the error message more clear if webpack config comes back undefined
* Update check and add test
* bump
* Update build-output test
Co-authored-by: JJ Kasper <jj@jjsweb.site>
This reverts #18921 and ensures that the Babel runtime is only inlined as an absolute path when using PnP as before, but then including the correction this resolution as implemented by @merceyz only in the PnP cases, while keeping the diff to a minimum.
Fixes#16173
## What
Restores handling of termination signals, `SIGTERM` and `SIGINT`, to allow graceful termination of next commands. Seems to have been removed during a child process refactor #6450, was this intentional?
## Why
Currently the command processes have to be forcefully killed. This would help those using Next.js with custom servers and tools like Docker and Kubernetes that rely on termination signals to shutdown instances.
---
Where would be a good location to add some tests? [test/integration/cli/test/index.test.js](fc98c13a2e/test/integration/cli/test/index.test.js)?
This updates the fallback locale for `locale: false` to be the `defaultLocale` instead of the currently active `locale` as it allows passing through URLs more seamlessly as a URL without the locale prefixed can be treated as the `defaultLocale` instead of having to worry if the locale matches the currently active locale. This also ensures `locale={false}` is tested in the i18n-support-catchall suite
Closes: https://github.com/vercel/next.js/issues/19048
This ensures navigations to non-configured locales causes the 404 page to be shown, it also adds tests to ensure direct visits for non-configured locales 404s correctly.
Fixes: https://github.com/vercel/next.js/issues/19214
This PR removes the modern mode experiment because:
- It does not yield meaningful bundle size wins when compared to other initiatives we've taken
- It's not compatible with webpack 5 (which we're upgrading to)
- It's currently broken and causes most apps to malfunction
- There's no champion currently owning the experiment
We can re-introduce this in the future when we'd like to make it a default for all Next.js apps.
Note: **Next.js still supports Differential Loading (`nomodule`) and does it by default.** This PR strictly removes the experimental modern _syntax_, and does not disable our existing modern/legacy polyfilling.
---
Fixes#19200Fixes#18960Fixes#14707Fixes#14465
This ensures redirects are handled properly with i18n + `trailingSlash: true`, additional tests have also been added to ensure this is covered
Fixes: https://github.com/vercel/next.js/issues/19069
This makes sure SSG data is correctly prefetched for the default locale and other locales on the same page. Tests for this behavior have been added for catch-all and normal pages.
Closes: https://github.com/vercel/next.js/issues/19048
We accidentally regressed back in 9.5 and dropped support for inline CSS comments. PostCSS always parses these as pass-through (and not a syntax error), which can cause problems when minifying.
Browsers do a similar thing and ignore the comments.
To ensure we generate valid CSS, this adds support for stripping the CSS comments from the build.
---
Fixes#15589Closes#17130
Fixes#18720
This removes image preloading. It doesn't work correctly on any browser other than Chrome (with Chrome's real engine). On all other browsers, it triggers 2x the bytes to be downloaded. The tradeoff isn't worth it here IMO.
Chrome itself should be smart enough to bump an `<img />` tag's priority over other preloads that are script type during the preparse phase.
We can reintroduce this when we don't hurt non-Chrome users.
This ensures root optional-catch-all index routes with i18n are output to the correct location and are also loaded from the `prerender-manifest` correctly.
Fixes: https://github.com/vercel/next.js/issues/19095
## Description
Fixes#18338 - Fixed an issue with `trailingSlash: true` adding a slash to the end of an external link.
After
```
<h1 class="Home_title__3DjR7">Welcome to <a href="https://nextjs.org">Without slash</a></h1>
<h1 class="Home_title__3DjR7">Welcome to <a href="https://nextjs.org">With slash?</a></h1>
```
Before
```
<h1 class="Home_title__3DjR7">Welcome to <a href="https://nextjs.org">Without slash</a></h1>
<h1 class="Home_title__3DjR7">Welcome to <a href="https://nextjs.org/">With slash?</a></h1>
```
In working with @devknoll on https://github.com/vercel/next.js/pull/17770 we thought it would be a good idea to update to the latest minor version from 1.2.20 -> 1.4.9 based on some bug fixes in these minor releases. I would like to separate this out to simplify the growing changeset in https://github.com/vercel/next.js/pull/17770, where we need to use `node-html-parser` to parse HTML for custom react components.
The linked changeset above will take some time and there are some [useful bug fixes](https://github.com/taoqf/node-html-parser/commits/master) and features in this minor release we could benefit from anyway. Namely:
- add nextSibling, nextElementSibling
- missing node tag
- `<style>` tag is not parsed correctly
Also I think it's a good idea to separate this out for testing.
This fixes a few things related to optional catch-all routes and i18n. The first thing is it ensures the correct data route is generated on the client so that the locale isn't duplicated for an optional catch-all route, the next is it ensures the browser history is updated correctly when only a locale change is occurring, and then it also ensures we handle the locales and normalizing for fallback optional catch-all pages correctly.
Tests have been added to ensure these cases are covered properly and we don't regress on them, these changes were also tested on Vercel [here](https://next-js-bug-i18n-root-params-nybg44l0b.vercel.app/)
Fixes: https://github.com/vercel/next.js/issues/18633
Fixes: https://github.com/vercel/next.js/issues/19059
This pull request completely replaces our old page loader with a brand new route loader.
Our existing comprehensive test suite means I did not need to add a bunch of tests. I did add them where behavior was added or fixed.
Summary of the changes:
- Eagerly evaluates prefetched pages in browser idle time (speeds up transitions)
- Router is **no longer frozen** indefinitely if the Build Manifest never arrives
- Router is **no longer frozen** indefinitely if a page fails to bootstrap
- New `withFuture` utility instead of ad-hoc deduping per resource
- Prefetching is now delayed until browser idle time to not impact TTI
- Browsers without `prefetch` now fall back to eager evaluation instead of using `preload`
- We're now ready to serve non-static assets **with `no-store` without breaking prefetching**
- **Application can now hydrate without fetching CSS assets—this is a huge performance win that was previously blocking hydration**
---
The minor size increase here is unfortunate, but we have to incur it for correctness.
---
Fixes#18389Fixes#18642
This confused me a lot, because in the case of `withBundleAnalyzer({})` it will ignore any previous config and basically override everything.
Furthermore, it makes more sense to move the call with `enabled` option inside so it's aligned with other plugins approach.
This ensures we use the `defaultLocale` for a locale domain when rendering non-static pages. Static pages will initially contain the global `defaultLocale` and then be updated on the client since we don't currently prerender a version of the pages for each locale domain.
Closes: https://github.com/vercel/next.js/issues/18970
Fixes#18563 by adding the etag header to the optimized image response.
This does _not_ change the expireAt (TTL) for cached files on the server, which still uses the max-age of the upstream response.
The new file format on disk for cached image files is the following:
```
.next/cache/images/<HASHED_QUERYSTRING>/<EXPIREAT>.<ETAG>.<EXT>
```
`node-sass` v5 introduced support for Node.js v15, which is not supported by v4. However, Next.js currently errors with
```
Error: Node Sass version 5.0.0 is incompatible with ^4.0.0.
```
when attempting to build with `node-sass` 5.0.0. This error comes from `sass-loader`. They have recently released version 10.0.5 which supports `node-sass` 5.0.0 (PR <https://github.com/webpack-contrib/sass-loader/pull/899>, release <https://github.com/webpack-contrib/sass-loader/releases/tag/v10.0.5>).
This replaces the seen set with a newly instantiated map of refs per
value in the array. This corrects the behavior that the refs map passed
into isSerializable contains only values along the path to the current
value: previously, because the refs map was shared among all values in
the array, this would trigger on instances such as:
```js
const x = [];
isSerializableProps('/', 'test', { arr: [x, [x]] });
```
... where the reference is shared but there is no cycle formed, as the
presence of elements is disjoint.
Fixes#18228.
This ensures dynamic routes are correctly generated for `next start` with i18n and adds tests to the i18n suite to ensure they are working correctly.
Closes: https://github.com/vercel/next.js/issues/18397
This PR fixes two bugs causing HTML validators to complain.
- Error: Bad value data:image/svg+xml;charset=utf-8, for attribute src on element img: Illegal character in scheme data: < is not allowed.
- Fixed by using base64 for svg during `layout=intrinsic` to avoid angle brackets
- Error: Element img is missing required attribute src.
- Fixed by using base64 transparent gif for `loading=lazy` placeholder
Fixes#18850
This pull request fixes `<Image />` not updating when new props are passed by removing external DOM mutations and relying on React to do it instead.
As an added bonus, I've extracted the intersection observer from both the `<Image />` and `<Link />` component, as their instance can be shared!
The increase in size is minor (+3B), and actually a decrease for apps using both `<Image />` and `<Link />`.
---
Fixes#18698Fixes#18369
This makes sure we don't use es6 syntax when compiling the `web-vitals` package with `ncc` since that breaks IE11 compatibility
x-ref: https://github.com/vercel/ncc/pull/614
While we were fixing how Next.js handled CSS, we added a complex prefetch, preload, fetch sequence to acquire the CSS asset.
This unnecessarily overcomplicated what could've been only a `fetch()` from the very start!
---
Fixes#16932
This upgrades to ncc@0.25.0 and fixes the previous bugs including:
* ncc not referenced correctly in build
* Babel type errors
* node-fetch, etag, chalk and raw-body dependencies not building with ncc - these have been "un-ncc'd" for now. As they are relatively small dependencies, this doesn't seem too much of an issue and we can follow up in the tracking ncc issue at https://github.com/vercel/ncc/issues/612.
* `yarn dev` issues
Took a lot of bisecting, but the overall diff isn't too bad here in the end.
This adds inlining for Babel and the Babel plugins used in next.
This is based to the PR at https://github.com/vercel/next.js/pull/18823.
The approach is to make one large bundle and then separate out the individual packages from that in order to avoid duplications.
In the first attempt the Babel bundle size was 10MB... using "resolutions" in the Yarn workspace to reduce the duplicated packages this was brought down to a 2.8MB bundle for Babel and all the used plugins which is exactly the expected file size here.
This will thus add a 2.8MB download size to the next package, but save downloading any babel dependencies separately, removing a large number of package dependencies from the overall install.
The rule [total-functions/no-unsafe-readonly-mutable-assignment](https://github.com/danielnixon/eslint-plugin-total-functions#total-functionsno-unsafe-readonly-mutable-assignment) triggers with this error message:
> Assigning a readonly type to a mutable type can lead to unexpected mutation in the readonly value
when invoking
```
NextScript.getInlineScriptSource(this.props)
```
inside a `_document.tsx`'s render function.
due to `this.props` having the type:
```
props: Readonly<P> & Readonly<{ children?: ReactNode }>
```
in `@types/react`
On the other hand, this is a small, low-priority change (IMO), so an alternative work around is just to disable the lint rule for that line of course.
Lint, tests, and build passes.
Lint error was discovered using typescript@next, version `4.1.0-dev.20200921` and eslint-plugin-total-functions version `4.1.0`, but I tested the change to nextjs using typescript version `3.8.3`.
This pull request speeds up Next.js' rendering pipeline by fetching data, parsing it, and loading it into memory instead of only doing the network request.
This will mainly result in improved Firefox/Safari performance since they handled prefetch incorrectly—only Chrome did it right. This also gets us closer to being able to use `no-store` in our caching headers!
---
Fixes#18639
x-ref #18802
This updates to the latest ncc@0.24.1 release.
Initially I thought chalk needed to be removed to make this work, but it turns out it was a caching issue.
I've also added a cache clear to the rebuild command to avoid these issues hopefully in future.
This adds ncc inlining optimizations for the following dependencies:
* cacache
* schema-utils
* find-cache-dir
* mkdirp
* neo-async
* web-vitals
The slight increase in output in the reports here is due to the variation of the bundled version of web-vitals.
In addition, this moves ast-types to be a devDependencies entry instead of in dependencies as it was before https://github.com/vercel/next.js/pull/14746 as I could not see any production usage (ping @prateekbh). Happy to separate that out into a separate PR if preferred too.
This PR prints a pretty error when the Image `src` property is a [protocol-relative URL](https://www.paulirish.com/2010/the-protocol-relative-url/).
> Update 2014.12.17:
> Now that SSL is encouraged for everyone and doesn’t have performance concerns, this technique is now an anti-pattern. If the asset you need is available on SSL, then always use the https:// asset.
Fixes#18536
This is a prerequisite to being able to ncc inline the Babel dependencies in next.js.
The removal of preset-modules is based on replacing it with preset-env under `targets: { esmodules: true }`, as per the guidance from the package (https://www.npmjs.com/package/@babel/preset-modules):
> Starting from @babel/preset-env 7.9.0, you can enable the bugfixes: true option to get the same behavior as using @babel/preset-modules, but with support for custom targets. If you need to target browsers with native modules support (like this preset does), you can use targets: { esmodules: true }.
From the above, I'm pretty sure this is entirely a backwards compatible change, apart from the change to the runtime plugin list being visible. Perhaps @developit can confirm this as well.
Next.js would try to "recover" if its CSS assets went missing (i.e. a deployment occured) **while the page was initially loading**.
This handled a rare case where we'd try to let the Next.js complete hydrating even though a deployment occured.
However, in practice, this never worked: if the `fetch()` failed, that means the original assets never downloaded themselves (because the `fetch()` should be coming from disk cache).
Instead of letting Next.js get itself into a weird state, let's just stop hydration so that the page doesn't accidentally delete its styles.
The handle-no-styles behavior is already tested in `test/integration/css/test/index.test.js`. There was never a branch for it using its cached styles, so nothing else needs updated.
---
Fixes#17930
Serverside Dynamically loaded CSS module file insertion adds css-files as usual static files with special data-n-p tag, that is used in page transition logic. That files get removed on page transition cause they are not explicitly required in scope of page.
Mini-css-extract-plugin adds style tags at chunk insertion without any tags and leave them be, no matter how many page transitions were made.
I removed data-n-p tag from dynamically loaded css module files and added new data-n-d tag for it.
Fixes#16950
This makes sure we don't incorrectly strip locale characters from the path if it is not a locale prefix e.g. `/fr` should not be removed from `/frank`. Additional tests have been added to ensure this isn't stripped for this case.
Fixes: https://github.com/vercel/next.js/issues/18332
When visiting a non-locale prefixed path (`/hello` instead of `/fr/hello`) we don't trigger locale redirects currently so if another locale is matched we need to ensure this is reset to the `defaultLocale` for rendering to prevent a mis-match on the client and the server.
This also fixes hydration errors from occurring with `asPath` for `getServerSideProps` pages due to `normalizeLocalePath` expecting only a pathname and `asPath` containing `hash` and `query values also.
Fixes: https://github.com/vercel/next.js/issues/18337
Fixes: https://github.com/vercel/next.js/issues/18510
This adds support for passing `statusCode` in a `redirect` from `getServerSideProps` or `getStaticProps` which matches the `redirect` shape allowed to be returned for `redirects` in `next.config.js`
Closes: https://github.com/vercel/next.js/issues/18350
Older versions of Safari (and other browsers) do not support webp format so we were incorrectly falling back to png.
This PR fixes#18509 so that we fallback to the original image format if a modern format like webp was not explicitly provided in the Accept header.
Tests were added to ensure that the Accept header for Safari, Firefox, and Chrome work properly.
This makes sure we don't use invalid `x-now-route-matches` which can occur when `i18n` default locale is visited and a prerendered page is matched. To correct this we first check if we are able to derive the correct params from the URL and then bail on parsing `x-now-route-matches` if we are. Additional test cases are being added in the builder to ensure we don't regress on this
x-ref: https://github.com/vercel/next.js/discussions/18443Fixes#18602
This PR deprecates the `unsized` property from NextImage because the property did not accomplish the desired effect.
Users should rely on one of the new layouts instead:
- `<Image layout="fixed" />`
- `<Image layout="intrinsic" />`
- `<Image layout="responsive" />`
- `<Image layout="fill" />`
The `unsized` property will continue to work as-is in production but is deprecated and will throw in dev.
---
### TODO:
- [x] test `layout=fill` in typescript types
- [x] test `layout=fill` render behavior
- [x] test that `unsized` switches to `layout=fill`
- [x] test `next dev` erroring on `unsized`
- [ ] layout docs (tracked in issue #18554)
- [ ] both `layout=fill` and `layout=responsive` use all deviceWidths in the srcset
---
Fixes#18541
Co-authored-by: Steven <steven@ceriously.com>
This PR introduces a new `layout` property.
This allows 3 possible values (`fixed`, `intrinsic`, or `responsive`) which solve many use cases we have seen since 10.0.0 and will hopefully avoid usage of `unsized`.
Fixes#18351
Co-authored-by: Joe Haddad <joe.haddad@zeit.co>
This ensures we provide the current `locale`, `locales`, and `defaultLocale` in the context when rendering the 404 for a blocking SSG page
Fixes: https://github.com/vercel/next.js/issues/18505
This makes sure custom-routes function properly with i18n support. Since the `locale` is stripped from the `pathname` this re-adds when checking custom-routes to allow the locale to be matched against
Closes: https://github.com/vercel/next.js/issues/18349
