Add style to pseudo element

[Abhisheknanda1344463]

Hi @artf
Is there any way to add style bg-color on before of current element after changing the trait Color value?

 model: {
      defaults: {
        traits:[
          {
            changeProp: 1,
            type: 'color',
            label: 'Background Color',
            name: 'background-color',
          },
        ]
      },
      init(){
        this.on("change:background-color", this.updatecolor);
      },
      updatecolor(){
        const bg_color = this.get('background-color');
        // this.setStyle({"background-color": bg_color})
      },  
    },

[Abhisheknanda1344463]

@artf Could you please help?

[artf]

You have to use CssComposer.setRule