This fixes the incorrect `/_next/data` URL being generated on client transition due to the `as` value passed to `getRouteInfo` having the `basePath` which is used while interpolating the values for dynamic routes, specifically root catch-all routes. A regression test has also been added to ensure this is working
Closes: https://github.com/vercel/next.js/issues/15747
This updates to not automatically append params to the query for rewrites if one or more of the params are already used in the destination's path. No other behavior is being changed and if the user still wants the params in the query after using them in the destination's path they can manually add them like with redirects.
Closes: https://github.com/vercel/next.js/issues/15626
This pull request edits the `BuildManifest` that is sent to `/_document` instead of modifying a single input array to decouple its implementation details.
Optimally, we'd eliminate the `files` key all together.
---
Related to #16182
This PR removes a legacy router method that was used for old-style HMR, now replaced by Fast Refresh.
This method was not public:
```tsx
export type NextRouter = BaseRouter &
Pick<
Router,
| 'push'
| 'replace'
| 'reload'
| 'back'
| 'prefetch'
| 'beforePopState'
| 'events'
| 'isFallback'
>
```
Even if someone found this method, it's highly unlikely they could use it successfully—it required the full module object.
In most browsers, clicking links with the Alt key has a special behavior, for example, Chrome downloads the target resource. As with other modifier keys, the router should stop the original navigation to avoid preventing the browser’s default behavior.
When users click a link while holding the Alt key together, the browsers behave as follows.
Windows 10:
| Browser | Behavior |
|:-----------|:--------------------------------------------|
| Chrome 84 | Download the target resource |
| Firefox 79 | Prevent navigation and therefore do nothing |
| Edge 84 | Download the target resource |
| IE 11 | No impact |
macOS Catalina:
| Browser | Behavior |
|:-----------|:--------------------------------------------|
| Chrome 84 | Download the target resource |
| Firefox 79 | Prevent navigation and therefore do nothing |
| Safari 13 | Download the target resource |
Largely based on the code @threepointone wrote for react-codemod.
Co-Authored-By: Sunil Pai <threepointone@gmail.com>
Co-authored-by: Sunil Pai <threepointone@gmail.com>
This adds the following Node.js core polyfills only when the import is used:
- `path`
- `stream`
- `vm`
- `crypto`
- `buffer`
Fixes#15948
We'll have a separate issue about adding warnings for the usage of these modules in the browser, some polyfills like crypto are quite heavy and generally not needed for most applications (included accidentally through node_modules).
Fixes#15928
---
This would cause us to print the message too early and open the browser to a server that wasn't started yet. This waits until we're listening, but before the app is ready fully.
Since we now use query parameters to pass dynamic route params while routing on Vercel, this makes sure we normalize the request URL before populating the `asPath`
Fixes: https://github.com/vercel/next.js/issues/15879
This PR adds a second experimental post-processing step for the framework introduced by @prateekbh in #14746. The image post-processing step scans the rendered document for the first few images and uses a simple heuristic to determine if the images should be automatically preloaded.
Analysis of quite a few production Next apps has shown that a lot of sites are taking a substantial hit to their [LCP](https://web.dev/lcp/) score because an image that's part of the "hero" element on the page is not preloaded and is getting downloaded with lower priority than the JavaScript bundles. This post-processor should automatically fix that for a lot of sites, without causing any real performance effects in cases where it fails to identify the hero image.
This feature is behind an experimental flag, and will be subject to quite a bit of experimentation and tweaking before it's ready to be made a default setting.
Next.js plugins like `@next/mdx` inject additional webpack loaders to compile files, but they omit the necessary loader for Fast Refresh to work.
Instead of making these files deopt out of Fast Refresh, we can automatically detect and inject the loader in these cases.
Fixes#13574
By popular request, this pull request adds support for returning `fallback: 'blocking'` from `getStaticPaths`.
This new mode will cause unknown paths to be rendered on-demand ("SSR") without the static (placeholder) fallback.
This feature is **currently experimental and should not be used in production yet**. It's currently flagged behind `unstable_`:
```
fallback: 'unstable_blocking'
```
TODO:
- [x] Next.js tests
- [ ] Add Vercel support
- [ ] Vercel tests
---
Fixes#15637
These changes aim to resolve most of the concerns raised in #15756. It adds missing polyfills for legacy browsers up until ES2019:
- Number.{parseFloat,parseInt}
- ~Math.{acosh,asinh,atanh,cbrt,clz32,cosh,expm1,fround,hypot,imul,log10p,log1p,log2,sign,sinh,tanh,trunc}~ _[Removed as these are [not widely used](https://github.com/vercel/next.js/pull/15772#discussion_r463957931)]_
- While these may seem to weigh a lot, they barely add 1 kB to the resulting bundle:
<img width="492" alt="gzip: 32 kB vs. 30.9 kB, Brotli: 28.8 kB vs. 27.8 kB" src="https://user-images.githubusercontent.com/14854048/89100961-1376e600-d3fc-11ea-90fd-3e6632b70220.png">
- ~Object.fromEntries~ _[Removed as [it's rarely used in user code](https://github.com/vercel/next.js/pull/15772#discussion_r463984612)]_
Also, the following features are now supported with build-time transforms:
- ~`globalThis` (gets transformed into `window` in browser environments)~ _[Removed as it [could break existing applications](https://github.com/vercel/next.js/pull/15772#discussion_r463956269)]_
- `export * as ns from 'module'`
The suggested TypeScript library version has been set to ES2018, so the features below become unavailable in type-checked files (they're not evenly supported by module-compatible browsers, either):
- Object.fromEntries
- String.prototype.matchAll
- String.prototype.replaceAll
- Promise.any + AggregateError
- WeakRef
As for the `import.meta` support, [webpack v5 seems to fix that](https://github.com/webpack/webpack/pull/11075), so it should eventually become an issue of the past.
---
Fixes#15756
In terms of url rewriting, `trailingSlash` supports everything `exportTrailingSlash` does. We can just share all other code paths and deprecate `exportTrailingSlash`.
This PR shows a deprecation warning when `exportTrailingSlash` is used.
Also fixes https://github.com/vercel/next.js/issues/15774
We can update the tests now or later. (I kept them the same to prove it's non-breaking)
To do:
- [x] Do we want to keep this? => nope 841d4efc51/packages/next/next-server/lib/router/router.ts (L329)
- [x] I kept `exportTrailingSlash` here. Do we want to rename that as well? => nope 2d9d649d49/packages/next/build/index.ts (L959)
- Use latest terser version (still 1 warning in the stable version which is an open PR)
- Add emitOnErrors instead of noEmitOnErrors
- Added trace-deprecations for Next.js core development
- Using `namedChunks` where possible, this will also allow for faster access to the chunks as we no longer have to look them up like we did before using `find`
- Using the new asset hooks introduced in the latest webpack beta
- Using the new externals function signature
I think this is necessary for IE11.
via [Webpack docs](https://webpack.js.org/migrate/5/#turn-off-es2015-syntax-in-runtime-code-if-necessary)
> By default, webpack's runtime code uses ES2015 syntax to build smaller bundles. If your build targets environments that don't support this syntax (like IE11), you'll need to set output.ecmaVersion: 5 to revert to ES5 syntax.
Thank you
`pageProps` should always be defined to ensure everything is working as expected although to prevent a breaking change this adds an additional check before attempting to access `pageProps` before hydration. It also adds tests to prevent regressing on this
Closes: https://github.com/vercel/next.js/issues/15647
This pull request:
1. Relocates tests to correct location
1. Tests more scenarios
1. Fixes a bug with anchors at the start of error message
1. Fixes react key warning error
Fixes#15599
This updates collecting dynamic route params on Vercel to make sure that missing optional dynamic routes are undefined. Additional tests for this mode have also been added to ensure the params are being collected properly
Closes: https://github.com/vercel/next.js/issues/15579
* More helpful README
Updated to include more details about Next.js, link to the interactive tutorial, showcase, etc. Content mostly based on the official Next.js site.
* create-next-app readme
An updated readme with more details on options, benefits, etc.
* Apply edits from code review
Co-authored-by: Luis Alvarez D. <luis@vercel.com>
* Remove redundant intro
* Update packages/create-next-app/README.md
* Remove introduction and list in showcase
* Apply suggestions from code review
* Update packages/next/README.md
Co-authored-by: Luis Alvarez D. <luis@vercel.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>
Fixes https://github.com/vercel/next.js/issues/15188
`parseRelativeUrl` was used on urls that weren't always relative. It was used to generate a cache key, but we actually don't need these cache keys to be relative if the urls aren't relative.
Also took a look at the overall static data fetching logic and found a few things:
- [x] cache key is unnecessarily transformed through `prepareRoute`, we can just cache by resolved `dataHref` and remove that function. Pretty sure that `prepareRoute` was also introducing edge cases with `assetPath` and `delBasePath`
- [x] there is [a bug in the caching logic](ebdfa2e7a3/packages/next/next-server/lib/router/router.ts (L898)) that made it fail on the second visit: it should be `Promise.resolve(this.sdc[pathname])` instead of `Promise.resolve(this.sdc[dataHref])`. Also added a test for this
- [x] ~converted to async await to improve stacktraces and readability.~ I assumed this was fine since I saw some async/awaits in that file already but it seems to just blow up the size of the non-modern bundle.
- [x] extracted nested `getResponse` function and define it top level. this should improve runtime performance
- [x] convert `_getStaticData` and `_getServerData` to class methods instead of properties. Not sure why they were defined as properties but I think they belong on the prototype instead.
- [x] remove `cb` property from `fetchNextData`, it's unnecessary and makes the async flow hard to understand. The exact same logic can go in the `.then` instead.
- [ ] data fetching logic [retries on 5xx errors](ebdfa2e7a3/packages/next/next-server/lib/router/router.ts (L157)), but not on network level errors. It should also retry on those. It should also not retry on every 5xx, probably only makes sense on 502, 503 and 504. (e.g. 500 is a server error that I wouldn't expect to succeed on a retry)
The overall result also is a few bytes smaller in size
- Introduces a lint rule which points towards the unwanted polyfill.io features.
- Aim here is to make the user aware that which of the requested features are actually required vs which are already covered under `next-polyfills`
Next step: If the remaining required polyfills amounts to a only a few KBs then its better to include them in 1P javascript and remove the third party render blocking script tag.
Next.js forcibly setting `module: 'esnext'` in `tsconfig.json` is necessary to prevent TypeScript from erroring on the following code:
```tsx
import dynamic from 'next/dynamic';
const A = dynamic(() => import('../A'));
```
```
ERROR in /Users/joe/Desktop/scratch/test-cjs/pages/index.tsx(5,25):
5:25 Dynamic imports are only supported when the '--module' flag is set to 'es2020', 'esnext', 'commonjs', 'amd', 'system', or 'umd'.
> 5 | const A = dynamic(() => import("../test"));
```
However, users may want to use one of the many other targets for better interoperability with projects that co-exist with their Next.js project (like `commonjs`).
When cross referenced with:
```
Option '--resolveJsonModule' can only be specified when module code generation is 'commonjs', 'amd', 'es2015' or 'esNext'.ts
```
That means we can permit any of these values:
```json5
parsedValues: [
ts.ModuleKind.ES2020,
ts.ModuleKind.ESNext,
ts.ModuleKind.CommonJS,
ts.ModuleKind.AMD,
],
```
This PR updates Next.js to allow those!
---
Fixes#15275
Chunks already have a normalized path.
Not sure if there are other chunks that require this change, I did a global search and didn't find similar cases.
Replace `url.parse` and `url.resolve` logic with whatwg `URL`, Bring in a customized `format` function to handle the node url objects that can be passed to router methods. This eliminates the need for `url` (and thus `native-url`) in core. Looks like it shaves off about 2.5Kb, according to the `size-limits` integration tests.
This adds handling for custom-routes with `basePath` to automatically add the `basePath` for custom-routes `source` and `destination` unless `basePath: false` is set for the route.
Closes: https://github.com/vercel/next.js/issues/14782
Found while working on figuring out this bug: https://twitter.com/timneutkens/status/1282129714627448832
I noticed that the node_modules got passed by the ignore still because when chokidar identifies a ignore pattern is a glob it treats the glob as-is instead of appending `/**` to the glob
Fix#14902
I created a separated helper that wraps `fs.promises.mkdir` and sets `recursive` option to `true` by default.
I'm not sure if this is the right approach (maybe it should just call `fs.promises.mkdir` from `create-app.ts`?), any thoughts?
Removed Option to enable `ReactProductionProfiling` from configuration and added a CLI switch for the same.
Users can now do `next build --profile` to enable react production profiling.
Also added a warning to notify users about the performance impact
Fixes: #14688
This adds additional checks against the routeKeys used to build the named regexes for dynamic routes to ensure they follow PCRE rules for named capture groups
x-ref: https://github.com/vercel/vercel/pull/4813
Discovered while working on https://github.com/vercel/next.js/pull/14848
when asPath is the same but href is different it should use `replaceState` instead of `pushState`, so that browser back/forward behavior is preserved. Currently it's comparing a path that includes basepath with one that excludes it, so `pushState` is always used. This makes sure the behavior is the same as when running next.js without a basepath
Currently following links are broken when using `basePath`:
```jsx
// pages/hello.js
<Link href="#hashlink">
<a id="hashlink">Hash Link</a>
</Link>
```
with `basePath: '/docs'`, this will navigate to `/docs/docs/hello#hashlink` instead of `/docs/hello#hashlink`
I have a further optimization that builds on this branch that removes `url.parse` and `url.resolve` in favor for `new URL()` in router and link. Will PR when this gets merged.
This updates the scroll position saving to occur as the scroll position changes instead of trying to do it when the navigation is changing since the `popState` event doesn't allow us to update the leaving history state once the `popState` has occurred.
The order of events that was previously attempted to save scroll position on a `popState` event (back/forward navigation)
1. history.state is already updated with state from `popState`
2. we replace state with the currently rendered page adding scroll info
3. we replace state again with the `popState` event state overriding scroll info
Using this approach the above event order is no longer in conflict since we don't attempt to populate the state with scroll position while it's leaving the state and instead do it while it is still the active state in history
This approach resembles existing solutions:
https://www.npmjs.com/package/scroll-behaviorhttps://twitter.com/ryanflorence/status/1029121580855488512
Fixes: https://github.com/vercel/next.js/issues/13990Fixes: #12530
x-ref: https://github.com/vercel/next.js/pull/14075
