:recycle: adjusting intersection setting

vue-theme/src/pages/list.vue

     methods: {
         loadMorePosts() {
             this.page++
+            console.log('loading...')
             this.getPosts(false)
         },
         getPosts(clear) {
     },
     created() {
         window.addEventListener("load", e => {
-            const footerEl = document.querySelector(".page--list article footer")
+            const footerEl = document.querySelector(".sub-footer")
             const observer = new IntersectionObserver(this.loadMorePosts, {
-                root: null,
                 rootMargin: "0px",
             })
             observer.observe(footerEl)