[Solved] The `/deep/` selector is not working using sass-loader in my VueJS application

In my Vue components, I am trying to use the /deep/

<style lang="scss" scoped>
  .parent-container {
    & /deep/ .child-comp {
      background-color: tomato;
      color: white;
    }
  }
</style>

 Solution: This is because /deep/is not supported by sass. You need to explicitly set your sass-loader to use node-sasslike this:

loader: 'sass-loader', options: { implementation: require('node-sass')