As discussed with @csswizardry. This is a temporary option in case you know the preloads are not needed. It will likely be a default once the ScriptLoader work from @janicklas-ralph has been proven in partner apps and landed.
```js
// pages/index.js
export const config = {
unstable_JsPreload: false
}
```
Running next.js in `development` causes issues when having pages named "development" or "developments",... as `this.buildId` = `development`
Fixes: https://github.com/vercel/next.js/issues/19520
Previously our automatic React injection approach injected `import React from 'react'` automatically whenever JSX was detected. The new official JSX transform solves this by enforcing importing `React` when it is used.
This codemod automatically converted files that are using a "global React variable" to use `import React from 'react'`
This removes the peer dep on `webpack` from `react-dev-overlay`, as it is for types only.
This makes the peer dep on `webpack` optional for `react-refresh-utils`, as you can provide webpack via the constructor (how Next.js does).
This picks up on the inlining work in https://github.com/vercel/next.js/pull/20598 to also include webpack loader inlining optimizations.
This includes:
* The dependencies of sass-loader
* resolve-url-loader
And for added benefit:
* babel-plugin-transform-define
* babel-plugin-transform-react-remove-prop-types
style-loader and css-loader didn't inline easily. Perhaps we can come back to these ones.
Get rid of the unmet peer dependency warning when installing
a next.js project wtih node-sass 5.
node-sass 5 is the currently maintained version and removes
support one deprecated API and Node.js versions that Next.js does
not support either. Next.js uses node-sass 5 in devDependencies.
node-sass changelog: https://github.com/sass/node-sass/releases
On the other hand, as the docs encourage the sass package instead of node-sass,
(see errors/duplicate-sass.md)
I have updated examples which used node-sass 4 to the latest sass instead.
Fixes: https://github.com/vercel/next.js/issues/19100
> According to https://nextjs.org/docs/basic-features/image-optimization#caching Next.js populates a cache dir when using the new <Image /> component. This is not the case when using SVG files. This results in a performance penalty.
I created a function for writing images to cache directory (`wrirteToCacheDir`) and it is called for all images.
However, vector and animated images are not optimized before writing them to cache dir
Related to #18179
Hello friends
Ran into this bug on our production site, prerenderManifest stores revalidation info for the index as `"/": { .. }`, but the code tries to access this information as `"/index"`.
This leads to our index page always having s-max-age: 1
This pull request adds `future.strictPostcssConfiguration`, allowing users to opt-into the more strict PostCSS configuration loading.
This stricter PostCSS configuration loading ensures that CSS can be cached across builds.
