item-class wrap-class not applied when using Scoped Style

[m4m205]

Hello mfuu

it looks like

please check https://codesandbox.io/s/gracious-mirzakhani-69wgsy?file=/src/components/HelloWorld.vue codesandbox

the classes 'red-background' and 'hover-background' not applied!

did I do some syntax error?

[mfuu]

The style should be like this:

.a >>> .b { ... }

or in scss

.a {
  /deep/ .b {
    
  }
}

[m4m205]

oh, thank you again :-)
that is working now