为什么要把postcss-loader单独写在postcss.config.js里才可以解决问题?为什么不能全部写在webpack.config.js里
ERROR in ./node_modules/css-loader?importLoaders=1!./node_modules/postcss-loader/lib?{"plugins":[null]}!./src/css/flex.css
Module build failed: TypeError: Cannot read property 'postcss' of null
at Processor.normalize (/Users/apple/web-demo/node_modules/postcss-loader/node_modules/postcss/lib/processor.js:136:12)
at new Processor (/Users/apple/web-demo/node_modules/postcss-loader/node_modules/postcss/lib/processor.js:51:25)
at postcss (/Users/apple/web-demo/node_modules/postcss-loader/node_modules/postcss/lib/postcss.js:73:10)
at Promise.resolve.then.then (/Users/apple/web-demo/node_modules/postcss-loader/lib/index.js:137:12)
@ ./node_modules/css-loader?importLoaders=1!./node_modules/postcss-loader/lib?{"plugins":[null]}!./src/css/common.css 3:10-156
@ ./src/css/common.css
@ ./src/app.js
为什么要把postcss-loader单独写在postcss.config.js里才可以解决问题?为什么不能全部写在webpack.config.js里