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VUE3 Beginner’s Introduction: Use Vue.js components to create waterfall flow effects
Vue.js is a popular front-end JavaScript framework. Its popularity continues to rise and it has become one of the mainstream front-end frameworks now. . Vue3 is the latest version, which has many improvements in performance and built-in functions. In this article, we will explore how to create a waterfall effect using Vue.js components. If you are a beginner, this article will be very helpful.
Step 1: Install Vue.js
Vue.js can be installed through npm. If you are installing in a global environment, just use the following sentence:
npm install Vue
This command will install Vue.js globally to your machine. If you are using it in a project, you can use the following command:
npm install --save Vue
In this way, Vue.js will be added to the dependencies of your project. Now your environment is ready.
Step 2: Create a new Vue.js project
Open the command line, enter the folder where you want to store the project, and enter the following sentence to create a new Vue.js project:
vue create myproject
This command will create a new project named myproject. After creation, enter the folder where the project is located:
cd myproject
Then run the following command to start your project:
npm run serve
This command will start a local server and display it in the browser Open a page. If you see a Vue.js welcome image, it means you have successfully started your Vue.js project.
Step 3: Install third-party library
In this project, we need to use a third-party library called vue-waterfall-easy to create the waterfall flow effect. This library is very easy to use. You only need to use the following command to install it:
npm install vue-waterfall-easy --save
After the installation is complete, we need to introduce this library in the main.js file:
import waterfall from 'vue-waterfall-easy' Vue.use(waterfall)
Step 4: Create A waterfall flow component
Now, we need to create a Vue.js component to achieve the waterfall flow effect. Create a Waterfall.vue file under src/components, and then complete the following code:
<template> <div class="waterfall"> <div v-for="(item, index) in list" :key="index" :class="'column-'+(index%cols)"> <div v-for="(innerItem, innerIndex) in item" :key="innerIndex" class="waterfall-item"> <img :src="innerItem.src"> </div> </div> </div> </template> <script> export default { name: 'Waterfall', props: { data: { type: Array, default: () => [] }, cols: { type: Number, default: 3 } }, data () { return { list: [] } }, created () { this.list = this.generateList(this.data, this.cols) }, methods: { generateList (data, cols) { const list = [] for (let i = 0; i < cols; i++) { list.push([]) } for (let i = 0; i < data.length; i++) { const item = data[i] const index = i % cols list[index].push(item) } return list } } } </script> <style> .waterfall { display: flex; flex-wrap: wrap; margin: -8px 0 0 -8px; } .waterfall-item { padding: 8px 0 0 8px; box-sizing: border-box; width: calc(100% / 3 - 8px); } </style>
We define a component named Waterfall, which will receive two props: data and column number. The component will generate a two-dimensional array based on the incoming data and number of columns, and use the v-for instruction to render the image. This component will ultimately generate a waterfall effect layout.
Step 5: Using components
The last step is to add the component we just created to our App.vue. Add the following code to App.vue:
<template> <div id="app"> <waterfall :data="images"></waterfall> </div> </template> <script> import Waterfall from './components/Waterfall.vue' export default { name: 'App', components: { Waterfall }, data () { return { images: [ { src: require('@/assets/image1.jpeg') }, { src: require('@/assets/image2.jpeg') }, { src: require('@/assets/image3.jpeg') }, { src: require('@/assets/image4.jpeg') }, { src: require('@/assets/image5.jpeg') }, { src: require('@/assets/image6.jpeg') } ] } } } </script>
We introduced the Waterfall component in App.vue and used the v-for directive to render some images. Now if you start your Vue.js project, you will see a waterfall effect layout.
Summary
In this tutorial, we use the Vue.js component and the third-party library vue-waterfall-easy to implement a waterfall flow effect layout. Vue.js is a popular front-end framework that is very convenient to use on complex web page layouts such as waterfall flows. I hope this article will be helpful to developers who are new to Vue.js.
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