SCSS handle

package.json

{
  "devDependencies": {
    "autoprefixer": "^9.7.3",
    "node-sass": "^4.13.0",
    "postcss-cli": "^6.1.3"
  },
  "scripts": {
    "css:dev": "node-sass src/scss/style.scss style.css -w",
    "css:prebuild": "node-sass src/scss/style.scss style.css",
    "css:postcss": "postcss style.css -r --use autoprefixer -c postcss.config.js",
    "css:build": "npm run css:prebuild && npm run css:postcss"
  },
  "browserslist": [
    "> 1%",
    "last 3 version"
  ]
}

postcss.config.js

module.exports = {
    plugins: {
        autoprefixer: require('autoprefixer'),
    }
}