import { customAttribute } from "aurelia-framework"; import { inject } from "aurelia-dependency-injection"; import { config } from "./../../config"; @customAttribute(config.collapsibleHeader) @inject(Element) export class CollapsibleHeaderAttribute { constructor(private element: Element) { } public attached() { this.element.classList.add("collapsible-header"); } public detached() { this.element.classList.remove("collapsible-header"); } }