VUE3 introductory tutorial: Use Vue.js plug-in to play with SVG

With the continuous development of modern Web front-end development, more and more technologies are widely used in actual development. Among them, Vue.js is currently one of the most popular JavaScript frameworks. It is based on the MVVM model and provides a rich API and component library, making it easier to develop responsive, reusable, and efficient web applications. The latest version of Vue.js 3 has better performance and richer features than the old version, which has attracted widespread attention and research.

This article will introduce you to a method of using Vue.js plug-in to play with SVG. SVG is an XML markup language used to describe two-dimensional vector graphics. It can be directly rendered by the browser and supports responsive design. This article will use Vue.js and the Vue.js plug-in to build a simple SVG gallery to demonstrate the basic use of Vue.js 3.

What is SVG?

SVG, the full name of Scalable Vector Graphics, is scalable vector graphics. It is an open standard based on XML markup language to describe two-dimensional vector graphics. SVG images can be rendered directly through the browser, so they have great advantages in performance, and unlike pixel graphics, SVG graphics are vector graphics, so they will not be distorted no matter they are enlarged or reduced, even if they are enlarged to infinity. Loss of clarity. In addition, SVG also has the characteristics of responsive design, allowing it to maintain the same performance on different devices.

Install Vue.js and Vue.js plug-ins

Before using Vue.js to build an application, you first need to install Vue.js and its plug-ins. Here are the steps to install Vue.js 3:

1. via javascript [javascript] Get started quickly with Vue.js.
2. Or install through npm: npm install vue@next
3. Install the Vue.js plug-in. This article will use the vue-svg plug-in: npm install vue- svg@4.0.1

##Build SVG Gallery

Through the above steps, we have successfully installed Vue.js and its plugins. Next, let's build a simple SVG gallery.

First, we need to create a Vue.js instance and add a tag to its template to place the SVG image. The specific code is as follows:

<div id="app">
  <svg>
    <!-- SVG代码将会在此处插入 -->
  </svg>
</div>

Next, we need to register the vue-svg plug-in in the Vue.js instance and pass in the SVG file path. The implementation code of the Vue.js plug-in is as follows:

import { createApp } from 'vue'
import App from './App.vue'
import VueSvgPlugin from 'vue-svg'

createApp(App).use(VueSvgPlugin, {url: './assets/img.svg'}).mount('#app')

In the example, we referenced the App.vue component, registered the vue-svg plug-in through use, and passed the SVG file path into the VueSvgPlugin. This enables rendering of SVG images in templates. In this example, the SVG image is an external SVG file loaded via the url attribute.

Next, in the SVG file, we can use the two-way binding syntax of Vue.js to add interactive behaviors and responsive effects to the image. Here is a simple SVG gallery example:

<template>
  <svg width="800" height="400">
    <rect v-for="(rect, index) in rects"
          :key="index"
          :x="rect.x"
          :y="rect.y"
          :width="rect.width"
          :height="rect.height"
          fill="red"
          @click="removeRect(index)"
          >
    </rect>
  </svg>
</template>

<script>
export default {
  data() {
    return {
      rects: [
        { x: 100, y: 100, width: 100, height: 100 },
        { x: 300, y: 150, width: 150, height: 150 },
        { x: 500, y: 100, width: 120, height: 120 }
      ]
    }
  },
  methods: {
    removeRect(index) {
      this.rects.splice(index, 1)
    }
  }
}
</script>

In the above code, we have added two-way bound data and events for each rectangle in the SVG image. Use the v-for directive of Vue.js to generate the corresponding rectangular element, use the v-bind directive to bind data, and use the v-on directive to register events. With the simple code above, we have successfully built a responsive SVG gallery.

Summary

This article briefly introduces the basic usage of Vue.js 3 and how to use Vue.js plug-in to play with SVG. Vue.js is an extremely popular JavaScript framework that is widely used in web front-end development. When using Vue.js, we can use the rich API and component libraries it provides to quickly develop responsive, reusable, and efficient web applications. Using the Vue.js plug-in to build SVG galleries is a very interesting and practical method, which allows us to achieve responsive design and interactive effects more conveniently. Therefore, learning Vue.js and SVG is very important and meaningful for web front-end developers.

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