How to handle the compression and dynamic loading of image resources in Vue technology development

In modern web development, image resources are inevitable. However, large high-resolution images may affect the loading speed of web pages and affect the user experience. Therefore, compression and dynamic loading of image resources have become important issues in development. This article will introduce how to handle the compression and dynamic loading of image resources in Vue technology development, and provide specific code examples.

1. Image Compression

In order to improve the loading speed of web pages, we can compress image resources. In Vue technology development, you can use third-party libraries such as imagemin-webpack-plugin and image-webpack-loader to achieve image compression.

First, install these dependent libraries:

npm install imagemin-webpack-plugin image-webpack-loader -D

Then, configure the webpack.config.js file:

const ImageminPlugin = require('imagemin-webpack-plugin').default;
const imageminMozjpeg = require('imagemin-mozjpeg');

module.exports = {
  // ...
  module: {
    rules: [
      // ...
      {
        test: /.(jpe?g|png|gif|svg)$/i,
        use: [
          {
            loader: 'image-webpack-loader',
            options: {
              mozjpeg: {
                progressive: true,
                quality: 65
              },
              // optipng.enabled: false will disable optipng
              optipng: {
                enabled: false,
              },
              pngquant: {
                quality: [0.65, 0.90],
                speed: 4
              },
              gifsicle: {
                interlaced: false,
              },
              // the webp option will enable WEBP
              webp: {
                quality: 75
              }
            }
          }
        ]
      }
    ]
  },
  plugins: [
    new ImageminPlugin({
      plugins: [
        imageminMozjpeg({
          quality: 75,
          progressive: true
        })
      ]
    })
  ]
};

In the above code, we willimage-webpack-loader and imagemin-webpack-plugin apply to .jpe?g, .png, .gif## Image resources in # and .svg formats. By configuring compression parameters, you can reduce the file size of images while maintaining high quality. The configuration of specific parameters can be adjusted according to actual needs.

2. Dynamic loading of images

In the development of Vue technology, we can use lazy loading to achieve dynamic loading of images. Image resources are only loaded when the image enters the user's visible area, which can reduce initial loading time and bandwidth usage.

First, install the

vue-lazyload dependent library:

npm install vue-lazyload -S

Then, introduce and use the library in

main.js in the Vue project ：

import Vue from 'vue'
import App from './App.vue'
import VueLazyload from 'vue-lazyload'

Vue.use(VueLazyload)

new Vue({
  render: h => h(App),
}).$mount('#app')

Next, in the component that needs to dynamically load images, use the

v-lazy instruction to introduce image resources:

<template>
  <div>
    <img v-lazy="imageSrc" alt="圖片">
  </div>
</template>

<script>
export default {
  data() {
    return {
      imageSrc: 'path/to/image.jpg'
    }
  }
}
</script>

In the above code,

The v-lazy instruction will load the image resource bound to imageSrc only when it enters the user's visible area.

Through the above method, we can realize compression and dynamic loading of image resources in Vue technology development. Through image compression, we can reduce the size of image files and improve web page loading speed. By dynamically loading images, we can reduce bandwidth usage during initial loading and improve user experience. The above code examples provide you with specific implementation methods and hope to be helpful to Vue developers.

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