Vue scroll loader

Scroll loaders are essential components in web development, enabling dynamic loading of content as users scroll down a page. In this comprehensive guide, we’ll delve into creating a Vue.js scroll loader, exploring various techniques to seamlessly load and display data as the user scrolls through a page. Harnessing the power of Vue.js and its reactivity, you’ll gain the skills to implement an efficient and user-friendly scroll loader for your web applications.

Introduction to Vue.js and Scroll Loaders

Vue.js, a progressive JavaScript framework, offers a robust platform for building interactive user interfaces. Combining Vue.js with a scroll loader allows you to create a smooth and responsive experience for users as they navigate through your content. This guide will walk you through the process of building a Vue.js scroll loader from the ground up.

Setting Up the Vue.js Project

Begin by setting up a new Vue.js project using the Vue CLI:

vue create vue-scroll-loader

Navigate to the project directory:

cd vue-scroll-loader

Building the Scroll Loader Component

Create a modular Vue component to encapsulate the structure and functionality of the scroll loader. Let’s name it ScrollLoader.vue:

<!-- ScrollLoader.vue -->
<template>
  <div class="scroll-loader-container" ref="scrollContainer">
    <div v-for="item in items" :key="item.id" class="scroll-item">
      {{ item.text }}
    </div>
    <div v-if="isLoading" class="loading-indicator">Loading...</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [],
      isLoading: false,
      page: 1,
    };
  },
  mounted() {
    this.fetchData();
    this.addScrollListener();
  },
  methods: {
    fetchData() {
      // Simulate fetching data from an API
      this.isLoading = true;
      setTimeout(() => {
        const newItems = Array.from({ length: 10 }, (_, index) => ({
          id: this.items.length + index + 1,
          text: `Item ${this.items.length + index + 1}`,
        }));
        this.items = [...this.items, ...newItems];
        this.isLoading = false;
      }, 1000);
    },
    addScrollListener() {
      const scrollContainer = this.$refs.scrollContainer;
      scrollContainer.addEventListener('scroll', this.handleScroll);
    },
    handleScroll() {
      const scrollContainer = this.$refs.scrollContainer;
      if (
        scrollContainer.scrollTop + scrollContainer.clientHeight >=
        scrollContainer.scrollHeight - 20
      ) {
        this.page++;
        this.fetchData();
      }
    },
  },
};
</script>

<style scoped>
/* Component-specific styles here */
.scroll-loader-container {
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid #ccc;
  padding: 10px;
}

.scroll-item {
  padding: 10px;
  margin-bottom: 5px;
  background-color: #f8f8f8;
  border-radius: 4px;
}

.loading-indicator {
  text-align: center;
  padding: 10px;
  color: #888;
}
</style>

In this example, the ScrollLoader component includes a container for scrollable content, a loading indicator, and a scroll event listener. The fetchData method simulates fetching additional data from an API when the user scrolls to the bottom of the container.

Using the Scroll Loader in Your App

Integrate the ScrollLoader component into your main application file (e.g., App.vue):

<!-- App.vue -->
<template>
  <div id="app">
    <ScrollLoader />
  </div>
</template>

<script>
import ScrollLoader from './components/ScrollLoader.vue';

export default {
  components: {
    ScrollLoader,
  },
};
</script>

<style>
/* Global styles here */
body {
  margin: 0;
  font-family: 'Arial', sans-serif;
  background-color: #f4f4f4;
}

#app {
  text-align: center;
  padding: 20px;
}
</style>

Here you can make a scroll loading component using vue.js

Install

NPM

npm install vue-scroll-loader

CDN

<script src="https://unpkg.com/vue-scroll-loader"></script>

Usage

Put <scroll-loader/> below the list, and use loader-* props to define its options

When the scroll-loader reaches the bottom of the viewport, the method specified by loader-method is executed

<scroll-loader :loader-method="getImageList" :loader-disable="disable">
</scroll-loader>

<!-- Replace the default loading animation with slot -->
<scroll-loader :loader-method="getImageList" :loader-disable="disable">
   <div>Loading...</div>
</scroll-loader>

import Vue from 'vue'
import ScrollLoader from 'vue-scroll-loader'

Vue.use(ScrollLoader)

new Vue({
    el: '#app',
    data() {
      return {
        disable: false,
        page: 1,
        pageSize: 30,
        images: [],
      }
    },
    methods: {
      getImageList() {
        axios.get('https://api.example.com/', {
            params: {
              page: this.page++,
              pageSize: this.pageSize,
            }
          })
          .then(res => {
               this.images = [...this.images, ...res.data]

            // Stop scroll loading...
            this.disable = res.data.length < this.pageSize
          })
          .catch(error => {
            console.log(error);
          })
      }
    }
  })

Options