Angular 4 With Ngx Infinite Scroll

I am trying to add an infinite scroll with ngx-infinite-scroll in my Angular 4 project. The array data has about 800 posts which are from API. Initially, I want to display 20 po

Solution 1:

first, save your original array like this

this.dataService.getPosts().subscribe((response)=>{                  
               this.originalPosts = response;
               this.posts = response.slice(0,20);
          });

 onScrollDown(){
   if(this.posts.length < this.originalPosts.length){  
     let len = this.posts.length;

     for(i = len; i <= len+20; i++){
       this.posts.push(this.originalPosts[i]);
     }
   }
 }

just push it on the same array you don't need to append it to the table directly, angular will manage itself, its too easy when using angular.