React Data Fetching - `refetch` prop use case

Timeline.js

import React, { Component, Fragment } from 'react'
import { Fetch } from 'react-data-fetching'

// Just here for better understanding
import { PostsList } from './components'

export default class Timeline extends Component {
  state = {
    isLoadingMore: false,
    posts: undefined,
    start: 0,
    limit: 20,
  }

  loadMorePosts = () => {
    this.setState(() => ({ isLoadingMore: true }))
  }

  saveData = (data) => {
    this.setState(
      (state) => ({
        isLoadingMore: false,
        posts: { ...state.posts, ...data.posts },
        start: state.start + 30,
        limit: state.limit + 30,
      })
    )
  }
  
  render() {
     return (
       <Fragment>
        <Fetch
          resultOnly
          url="https://api.nyan.com/feed"
          params={{
            start: this.state.start,
            end: this.state.limit,
          }}
          refetch={this.state.isLoadingMore}
          onFetch={this.saveData}
        />
        <PostsList
          data={this.state.posts}
          onLoadMore={this.loadMorePosts}
        />
       </Fragment>
     )
  }
 }