vue alias别名

...
  resolve: {
    extensions: ['.js', '.vue', '.json'],
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': resolve('src'),
      'assets': path.resolve(__dirname, '../src/assets'),
      'img': resolve('static/img'),
      '%': resolve('./static')
    }
  },
...