mounted() {
var vm =this
 var imgHandler = async function(state) {
 if (state) {
  //button is clicked
 }
 }
 vm.$refs.newEditor.quill.getModule("toolbar").addHandler("image", imgHandler)
}

 mounted() {
  var vm =this
  var imgHandler = async function(image) {
  vm.addImgRange = vm.$refs.newEditor.quill.getSelection()
  if (image) {
   var fileInput = document.getElementById(vm.uniqueId) //隐藏的file文本ID
   fileInput.click() //加一个触发事件
  }
  }
  vm.$refs.newEditor.quill.getModule("toolbar").addHandler("image", imgHandler)
 }

 <div
  v-loading="imageLoading"
  element-loading-text="请稍等，图片上传中">
  <quill-editor
  ref="newEditor"
  :options="newOption"
  style="height: 200px; margin-bottom: 54px"
  v-model="editorContent"
  @change="editorChange">
  </quill-editor>
  <form action="" method="post" enctype="multipart/form-data" id="uploadFormMulti">
  <input style="display: none" :id="uniqueId" type="file" name="avator" multiple accept="image/jpg,image/jpeg,image/png,image/gif" @change="uploadImg('uploadFormMulti')"><!--style="display: none"-->
  </form>
 </div>

 uploadImg: async function(id) {
   var vm = this
   vm.imageLoading = true
   var formData = new FormData($('#' + id)[0])
   try {
   const url = await vm.uploadImgReq(formData)// 自定义的图片上传函数
   if (url != null && url.length > 0) {
    var value = url
    vm.addImgRange = vm.$refs.newEditor.quill.getSelection()
    value = value.indexOf('http') != -1 ? value : 'http:' + value
    vm.$refs.newEditor.quill.insertEmbed(vm.addImgRange != null?vm.addImgRange.index:0, 'image', value, Quill.sources.USER)
   } else {
    vm.$message.warning("图片增加失败")
   }
   document.getElementById(vm.uniqueId).value=''
   } catch ({message: msg}) {
   document.getElementById(vm.uniqueId).value=''
   vm.$message.warning(msg)
   }
   vm.imageLoading = false
  },

 import Quill from 'quill'
 import { ImageResize } from '../modules/ImageResize.js'
 Quill.register('modules/imageResize', ImageResize)