Add new class programatically

Hello Artf, I want to edit the styles of components (mostly imported html) without modifying all components with the same class. I tried to add a random named class programmatically like this: this.editor.on('component:selected', function(model) { if (model && model.length > 2) { const uuid = this.s4(); // generate new random class name const selector = { name: uuid, type: 'class', label: uuid, }; model[1].attributes.classes.push(selectorManager.get(uuid)); let mClasees = model[1].attributes.classes; const uuid = this.s4(); const selector = { name: uuid, type: 'class', label: uuid, }; mClasee...