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Use Rule.oneOf to resolve correct loader (#2747)
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* Use oneOf to resolve correct loader

* Add html and json fallthrough again

* Use oneOf to resolve correct loader in dev

* Document file-loaders `js` exclusion

* Remove `jsx` from exclusion in prod config
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@Furizaa @JohnNilsson
Furizaa authored and JohnNilsson committed Aug 9, 2017
1 parent 408fa37 commit d81142e
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Showing 2 changed files with 155 additions and 163 deletions.
138 changes: 67 additions & 71 deletions packages/react-scripts/config/webpack.config.dev.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -144,89 +144,85 @@ module.exports = {
enforce: 'pre',
include: paths.appSrc,
},

// ** ADDING/UPDATING LOADERS **
// The "file" loader handles all assets unless explicitly excluded.
// The `exclude` list *must* be updated with every change to loader extensions.
// When adding a new loader, you must add its `test`
// as a new entry in the `exclude` list for "file" loader.

// "file" loader makes sure those assets get served by WebpackDevServer.
// When you `import` an asset, you get its (virtual) filename.
// In production, they would get copied to the `build` folder.
{
exclude: [
/\.html$/,
/\.(js|jsx)$/,
/\.(ts|tsx)$/,
/\.css$/,
/\.json$/,
/\.bmp$/,
/\.gif$/,
/\.jpe?g$/,
/\.png$/,
],
loader: require.resolve('file-loader'),
options: {
name: 'static/media/[name].[hash:8].[ext]',
},
},
// "url" loader works like "file" loader except that it embeds assets
// smaller than specified limit in bytes as data URLs to avoid requests.
// A missing `test` is equivalent to a match.
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
limit: 10000,
name: 'static/media/[name].[hash:8].[ext]',
},
},
// Compile .tsx?
{
test: /\.(ts|tsx)$/,
include: paths.appSrc,
loader: require.resolve('ts-loader'),
},
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader turns CSS into JS modules that inject <style> tags.
// In production, we use a plugin to extract that CSS to a file, but
// in development "style" loader enables hot editing of CSS.
{
test: /\.css$/,
use: [
require.resolve('style-loader'),
// "oneOf" will traverse all following loaders until one will
// match the requirements. When no loader matches it will fall
// back to the "file" loader at the end of the loader list.
oneOf: [
// "url" loader works like "file" loader except that it embeds assets
// smaller than specified limit in bytes as data URLs to avoid requests.
// A missing `test` is equivalent to a match.
{
loader: require.resolve('css-loader'),
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
importLoaders: 1,
limit: 10000,
name: 'static/media/[name].[hash:8].[ext]',
},
},
// Compile .tsx?
{
loader: require.resolve('postcss-loader'),
options: {
// Necessary for external CSS imports to work
// https://github.com/facebookincubator/create-react-app/issues/2677
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
autoprefixer({
browsers: [
'>1%',
'last 4 versions',
'Firefox ESR',
'not ie < 9', // React doesn't support IE8 anyway
test: /\.(ts|tsx)$/,
include: paths.appSrc,
loader: require.resolve('ts-loader'),
},
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader turns CSS into JS modules that inject <style> tags.
// In production, we use a plugin to extract that CSS to a file, but
// in development "style" loader enables hot editing of CSS.
{
test: /\.css$/,
use: [
require.resolve('style-loader'),
{
loader: require.resolve('css-loader'),
options: {
importLoaders: 1,
},
},
{
loader: require.resolve('postcss-loader'),
options: {
// Necessary for external CSS imports to work
// https://github.com/facebookincubator/create-react-app/issues/2677
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
autoprefixer({
browsers: [
'>1%',
'last 4 versions',
'Firefox ESR',
'not ie < 9', // React doesn't support IE8 anyway
],
flexbox: 'no-2009',
}),
],
flexbox: 'no-2009',
}),
],
},
},
],
},
// "file" loader makes sure those assets get served by WebpackDevServer.
// When you `import` an asset, you get its (virtual) filename.
// In production, they would get copied to the `build` folder.
// This loader don't uses a "test" so it will catch all modules
// that fall through the other loaders.
{
// Exclude `js` files to keep "css" loader working as it injects
// it's runtime that would otherwise processed through "file" loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/\.js$/, /\.html$/, /\.json$/],
loader: require.resolve('file-loader'),
options: {
name: 'static/media/[name].[hash:8].[ext]',
},
},
],
},
// ** STOP ** Are you adding a new loader?
// Remember to add the new extension(s) to the "file" loader exclusion list.
// Make sure to add the new loader(s) before the "file" loader.
],
},
plugins: [
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180 changes: 88 additions & 92 deletions packages/react-scripts/config/webpack.config.prod.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -144,104 +144,100 @@ module.exports = {
enforce: 'pre',
include: paths.appSrc,
},

// ** ADDING/UPDATING LOADERS **
// The "file" loader handles all assets unless explicitly excluded.
// The `exclude` list *must* be updated with every change to loader extensions.
// When adding a new loader, you must add its `test`
// as a new entry in the `exclude` list in the "file" loader.

// "file" loader makes sure those assets end up in the `build` folder.
// When you `import` an asset, you get its filename.
{
exclude: [
/\.html$/,
/\.(js|jsx)$/,
/\.(ts|tsx)$/,
/\.css$/,
/\.json$/,
/\.bmp$/,
/\.gif$/,
/\.jpe?g$/,
/\.png$/,
],
loader: require.resolve('file-loader'),
options: {
name: 'static/media/[name].[hash:8].[ext]',
},
},
// "url" loader works just like "file" loader but it also embeds
// assets smaller than specified size as data URLs to avoid requests.
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
limit: 10000,
name: 'static/media/[name].[hash:8].[ext]',
},
},
// Compile .tsx?
{
test: /\.(ts|tsx)$/,
include: paths.appSrc,
loader: require.resolve('ts-loader')
},
// The notation here is somewhat confusing.
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader normally turns CSS into JS modules injecting <style>,
// but unlike in development configuration, we do something different.
// `ExtractTextPlugin` first applies the "postcss" and "css" loaders
// (second argument), then grabs the result CSS and puts it into a
// separate file in our build process. This way we actually ship
// a single CSS file in production instead of JS code injecting <style>
// tags. If you use code splitting, however, any async bundles will still
// use the "style" loader inside the async code so CSS from them won't be
// in the main CSS file.
{
test: /\.css$/,
loader: ExtractTextPlugin.extract(
Object.assign(
{
fallback: require.resolve('style-loader'),
use: [
{
loader: require.resolve('css-loader'),
options: {
importLoaders: 1,
minimize: true,
sourceMap: true,
},
},
// "oneOf" will traverse all following loaders until one will
// match the requirements. When no loader matches it will fall
// back to the "file" loader at the end of the loader list.
oneOf: [
// "url" loader works just like "file" loader but it also embeds
// assets smaller than specified size as data URLs to avoid requests.
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
limit: 10000,
name: 'static/media/[name].[hash:8].[ext]',
},
},
//Compile .tsx?
{
test: /\.(ts|tsx)$/,
include: paths.appSrc,
loader: require.resolve('ts-loader')
},
// The notation here is somewhat confusing.
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader normally turns CSS into JS modules injecting <style>,
// but unlike in development configuration, we do something different.
// `ExtractTextPlugin` first applies the "postcss" and "css" loaders
// (second argument), then grabs the result CSS and puts it into a
// separate file in our build process. This way we actually ship
// a single CSS file in production instead of JS code injecting <style>
// tags. If you use code splitting, however, any async bundles will still
// use the "style" loader inside the async code so CSS from them won't be
// in the main CSS file.
{
test: /\.css$/,
loader: ExtractTextPlugin.extract(
Object.assign(
{
loader: require.resolve('postcss-loader'),
options: {
// Necessary for external CSS imports to work
// https://github.com/facebookincubator/create-react-app/issues/2677
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
autoprefixer({
browsers: [
'>1%',
'last 4 versions',
'Firefox ESR',
'not ie < 9', // React doesn't support IE8 anyway
fallback: require.resolve('style-loader'),
use: [
{
loader: require.resolve('css-loader'),
options: {
importLoaders: 1,
minimize: true,
sourceMap: true,
},
},
{
loader: require.resolve('postcss-loader'),
options: {
// Necessary for external CSS imports to work
// https://github.com/facebookincubator/create-react-app/issues/2677
ident: 'postcss',
plugins: () => [
require('postcss-flexbugs-fixes'),
autoprefixer({
browsers: [
'>1%',
'last 4 versions',
'Firefox ESR',
'not ie < 9', // React doesn't support IE8 anyway
],
flexbox: 'no-2009',
}),
],
flexbox: 'no-2009',
}),
],
},
},
},
],
},
],
extractTextPluginOptions
)
),
// Note: this won't work without `new ExtractTextPlugin()` in `plugins`.
},
// "file" loader makes sure assets end up in the `build` folder.
// When you `import` an asset, you get its filename.
// This loader don't uses a "test" so it will catch all modules
// that fall through the other loaders.
{
loader: require.resolve('file-loader'),
// Exclude `js` files to keep "css" loader working as it injects
// it's runtime that would otherwise processed through "file" loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/\.js$/, /\.html$/, /\.json$/],
options: {
name: 'static/media/[name].[hash:8].[ext]',
},
extractTextPluginOptions
)
),
// Note: this won't work without `new ExtractTextPlugin()` in `plugins`.
},
// ** STOP ** Are you adding a new loader?
// Make sure to add the new loader(s) before the "file" loader.
],
},
// ** STOP ** Are you adding a new loader?
// Remember to add the new extension(s) to the "file" loader exclusion list.
],
},
plugins: [
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