Vue.js cloud storage realizes image upload function

npm i cos-js-sdk-v5 --save

<template>
  <div>
    <el-upload
      list-type="picture-card"
      :limit="4"
      action="#"
      :file-list="fileList"
      :on-preview="preview"
      :http-request="upload"
      :on-change="change"
      :before-upload="beforeUpload"
      :accept="typeList"
      :on-remove="handleRemove"
    >
      <i class="el-icon-plus" />
    </el-upload>
    <el-progress
      v-if="showPercent"
      style="width: 180px"
      :percentage="percent"
    />
    <el-dialog title="Picture" :visible.sync="showDialog">
      <img :src="imgUrl" style="width: 100%" alt="" />
    </el-dialog>
  </div>
</template>
<script>
import COS from 'cos-js-sdk-v5'
const cos = new COS({
  SecretId: 'xxx', // secret id
  SecretKey: 'xxx' // secret key
}) // The instantiated package has the ability to upload and can be uploaded to the storage bucket in the account export default {
  data() {
    return {
      fileList: [], // Set the image address to an array showDialog: false, // Control the display of the pop-up layer imgUrl: '',
      currentImageUid: null,
      typeList: 'image/*',
      showPercent: false, // Whether to display the progress bar percent: 0 // Upload progress}
  },
  methods: {
    preview(file) {
      this.imgUrl = file.url
      this.showDialog = true
    },
    beforeUpload(file) {
      // File types allowed to be uploaded const types = ['image/jpeg', 'image/gif', 'image/bmp', 'image/png']
      if (!types.includes(file.type)) {
        this.$message.error('Uploaded images can only be in JPG, GIF, BMP, or PNG formats!')
        return false // return false will prevent the image from being uploaded}
      const maxSize = 1024 * 1024
      if (file.size > maxSize) {
        this.$message.error('The maximum image size cannot exceed 1M')
        return false
      }
      this.currentImageUid = file.uid
      this.showPercent = true
      return true
    },
    upload(params) {
      // console.log(params.file)
      if (params.file) {
        // Execute upload operation cos.putObject({
          Bucket: 'xxx', // Storage bucket Region: 'ap-nanjing', // Region Key: params.file.name, // File name Body: params.file, // File object to upload StorageClass: 'STANDARD', // The upload mode type can be directly set to the standard mode by default onProgress: (progressData) => {
            this.percent = progressData.percent * 100
          }
        }, (err, data) => {
          // How to process data after it is returned if (err) return
          this.fileList = this.fileList.map(item => {
            if (item.uid === this.currentImageUid) {
              return { url: 'http://' + data.Location, name: item.name }
            }
            return item
          })
          // console.log(this.fileList)
        })
      }
    },
    handleRemove(file, fileList) {
      this.fileList = this.fileList.filter(item => item.uid !== file.uid)
      // console.log(file)
      cos.deleteObject({
        Bucket: 'xxx', /* Required*/
        Region: 'ap-nanjing', /* The region where the bucket is located, required field*/
        Key: file.name /* Required*/
      }, (err, data) => {
        // console.log(err || data)
      })
    },
    change(file, fileList) {
      this.fileList = fileList
    }
  }
}
</script>

<template>
  <div class="app-container">
    <el-card>
      <el-tabs>
        <el-tab-pane label="Personal details">
          <user-info />
        </el-tab-pane>
        <el-tab-pane label="Reset Password">
          <!-- Place the form -->
          <el-form
            label-width="120px"
            style="margin-left: 120px; margin-top: 30px"
          >
            <el-form-item label="Password:">
              <el-input style="width: 300px" type="password" />
            </el-form-item>
            <el-form-item label="Confirm Password:">
              <el-input style="width: 300px" type="password" />
            </el-form-item>
            <el-form-item>
              <el-button type="primary">Reset</el-button>
            </el-form-item>
          </el-form>
        </el-tab-pane>
        <el-tab-pane label="Department Information">
          <department />
        </el-tab-pane>
        <el-tab-pane label="Select avatar">
          <image-upload />
        </el-tab-pane>
      </el-tabs>
    </el-card>
  </div>
</template>
<script>
import userInfo from './component/Userinfo'
import department from './component/Department'
import imageUpload from '@/components/ImagUpload'

export default ({
  components:
   'user-info': userInfo,
   'department': department,
   'image-upload': imageUpload
  },
  // 
    methods: {
    upload(e) {
      const file = e.target.files[0]
      const reader = new FileReader()
      reader.readAsDataURL(file)
      reader.onload = async function (e) {
        await upload({
          file: {
            originalname: '11.jpg',
            file: e.target.result
          }
        })
      }
    }
  }

})
</script>

import Layout from '@/layout'
export default {
  path: '/user',
  component: Layout,
  children: [{
    path: 'index',
    component: () => import('@/views/user/index'),
    name: 'user',
    meta: {
      title: 'User Management',
      icon: 'account'
    }
  },
  {
    path: 'detail',
    component: () => import('@/views/user/detail'),
    name: 'detail',
    hidden: true,
    meta: {
      title: 'User details',
      icon: 'account'
    }
  }]
}