:recycle: different settings for intersection

vue-theme/src/pages/list.vue

                 })
             }
             const settings = {
-                root: footerEl,
-                rootMargin: '-100px 0px 0px 0px',
                 threshold: 0.80
             }
             this.observer = new IntersectionObserver(onIntersect, settings)
             this.observer['_for_type'] = this.type
+            this.observer.observe(footerEl)
             console.log(this.observer)
         },
         unsetIntersectionLoader(type) {