详解如何在Javascript和Sass之间共享变量

npm install sass-loader node-sass webpack --save-dev

  // webpack.config.js
  module.exports = {
   module: {
    rules: [
     {
      test: /\.css$/,
      use: ['style-loader', 'css-loader', 'sass-loader']
     }
    ]
   }
  }

  // styles/animation.scss
  $animation-length: 250;
  $animation-length-ms: $animation-length + 0ms;

  :export {
   animationMillis: $animation-length-ms;
  }

  .ponent-enter {
   ...

   transition: all $animation-length-ms ease-in;
  }

// js/animation.js
import styles from '../styles/animation.scss'
import CSSTransitionGroup from 'react-transition-group/CSSTransitionGroup'

const millis = parseInt(styles.animationMillis)

...

<CSSTransitionGroup
 transitionName="ponent"
 transitionEnterTimeout={millis}
 transitionLeaveTimeout={millis}
/>

...