报错如图
{
test: [/\.css$/, /\.less$/],
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',
}),
],
},
},
{
loader: require.resolve('less-loader'), // compiles Less to CSS
}
],
}
{
// modify
test: /\.(css|less)$/,
loader: ExtractTextPlugin.extract(
Object.assign(
{
fallback: {
loader: require.resolve('style-loader'),
options: {
hmr: false,
},
},
use: [
{
loader: require.resolve('css-loader'),
options: {
importLoaders: 1,
minimize: true,
sourceMap: shouldUseSourceMap,
},
},
{
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',
}),
],
},
},
{
//add
loader: require.resolve('less-loader'),
}
],
},
extractTextPluginOptions
)
),
// Note: this won't work without `new ExtractTextPlugin()` in `plugins`.
},