mousedown: function(event) {
      let _this = this;
      if (!this.isEdit) {
        this.startX = event.x;
        this.startY = event.y;
        this.note.moving = true;
        document.onmousemove = event => {
          if (!_this.note.moving) return false;
 
          let dx = event.x - _this.startX;
          let dy = event.y - _this.startY;
 
          if (
            _this.note.x + dx <= 0 ||
            _this.note.x + dx >= _this.width - 250 ||
            _this.note.y + dy <= 60
          ) {
            return false;
          }
 
          _this.note.x1 = _this.note.x + dx;
          _this.note.y1 = _this.note.y + dy;
        };
        document.onmouseup = () => {
          if (!this.isEdit) {
            this.note.moving = false;
            this.note.x = this.note.x1;
            this.note.y = this.note.y1;
            this.saveNote();
            document.onmousemove = null;
            document.onmouseup = null;
          }
        };
      }
    }

 <div
      class="note-content"
      v-if="!isEdit"
      v-html="content"
      :ref="'note' + index"
    ></div>
    <el-input
      v-else
      class="note-content my-textarea"
      type="textarea"
      placeholder="請(qǐng)輸入內(nèi)容"
      :autosize="{ minRows: 10 }"
      v-model="content"
      :ref="'note' + index"
      @blur="handleChange"
    ></el-input>

// controller/note.js
const Notes = require("../model/notes");
var mongoose = require('mongoose');
module.exports = {
  updateNote(obj) {
    if (!obj.params._id) {
      obj.params._id = new mongoose.mongo.ObjectID();
    }
    return Notes.findByIdAndUpdate(
      obj.params && obj.params._id,
      {
        $set: obj.body
      },
      {
        upsert: true,
        new: true,
        setDefaultsOnInsert: true
      }
    )
      .then(function (newobj) {
        return Promise.resolve({
          status: 200,
          messgae: "OK"
        });
      })
      .catch((err) => {
        return Promise.reject(err);
      });
  },
  getNotes() {
    return new Promise(function (resolve, reject) {
      Notes.find()
        .then(function (newobj) {
          resolve(newobj);
        })
        .catch((err) => {
          reject(err);
        });
    });
  },
  deleteNoteById(_id) {
    return Notes.findByIdAndDelete(_id)
      .then(function (newobj) {
        return Promise.resolve({
          status: 200,
          messgae: "OK"
        });
      })
      .catch((err) => {
        return Promise.reject(err);
      });
  }
};

// model/note.js
var mongoose = require("mongoose");
var Schema = mongoose.Schema;
 
// 聲明一個(gè)數(shù)據(jù)集 對(duì)象
var noteSchema = new Schema({
  txt: {
    type: String,
    required: false
  },
  x: {
    type: Number
  },
  y: {
    type: Number
  },
  color: {
    type: Object
  },
  title:{
    type: String,
    default: "未命名"
  },
  createTime: {
    type: Date,
    default: Date.now
  }
});
mongoose.set("useCreateIndex", true);
mongoose.set('useFindAndModify', false);
// 將數(shù)據(jù)模型暴露出去
module.exports = mongoose.model("Notes", noteSchema, "notes");