ElementUIでは、ブラウザの上部にナビゲーションバーがぶら下がります.

	export default {
		name: 'week',
		data() {
			return {
				isFixed: false,
				offsetTop: 0
			};
		},
		mounted() {
			//   bar      #fixedBar         
			this.offsetTop = document.querySelector('#nav-fixed').offsetTop;
			//       
			window.addEventListener('scroll', this.handleScroll);
		},
		methods: {
			//                  
 			handleScroll() {
 				var scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
 				if (scrollTop >= this.offsetTop) {
 					this.isFixed = true;
 				} else {
 					this.isFixed = false;
 				}
 			}
		},
		destroyed() {
			//                
			window.removeEventListener('scroll', this.handleScroll);
		}
	}