How to use Vue to implement the drag and drop shuttle box function? Four ways to introduce

How to implement the drag and drop shuttle box function? The following article will introduce to you four ways to implement the drag and drop shuttle box function in Vue. I hope it will be helpful to you.

[Related recommendations: vuejs video tutorial]

1. Use native js to implement drag and drop

Click to open the video for more detailed explanation

    
      <meta>
      <title>Lazyload</title>
      <style>
        .drag {
          background-color: skyblue;
          position: absolute;
          line-height: 100px;
          text-align: center;
          width: 100px;
          height: 100px;
        }
      </style>
    
    
      <!-- left和top要写在行内样式里面 -->
      <div>按住拖动</div>
      <script></script>
      <script>
        // 获取DOM元素
        let dragDiv = document.getElementsByClassName(&#39;drag&#39;)[0]
        // 鼠标按下事件 处理程序
        let putDown = function (event) {
          dragDiv.style.cursor = &#39;pointer&#39;
          let offsetX = parseInt(dragDiv.style.left) // 获取当前的x轴距离
          let offsetY = parseInt(dragDiv.style.top) // 获取当前的y轴距离
          let innerX = event.clientX - offsetX // 获取鼠标在方块内的x轴距
          let innerY = event.clientY - offsetY // 获取鼠标在方块内的y轴距
          // 按住鼠标时为div添加一个border
          dragDiv.style.borderStyle = &#39;solid&#39;
          dragDiv.style.borderColor = &#39;red&#39;
          dragDiv.style.borderWidth = &#39;3px&#39;
          // 鼠标移动的时候不停的修改div的left和top值
          document.onmousemove = function (event) {
            dragDiv.style.left = event.clientX - innerX + &#39;px&#39;
            dragDiv.style.top = event.clientY - innerY + &#39;px&#39;
            // 边界判断
            if (parseInt(dragDiv.style.left) <= 0) {
              dragDiv.style.left = &#39;0px&#39;
            }
            if (parseInt(dragDiv.style.top) <= 0) {
              dragDiv.style.top = &#39;0px&#39;
            }
            if (
              parseInt(dragDiv.style.left) >=
              window.innerWidth - parseInt(dragDiv.style.width)
            ) {
              dragDiv.style.left =
                window.innerWidth - parseInt(dragDiv.style.width) + &#39;px&#39;
            }
            if (
              parseInt(dragDiv.style.top) >=
              window.innerHeight - parseInt(dragDiv.style.height)
            ) {
              dragDiv.style.top =
                window.innerHeight - parseInt(dragDiv.style.height) + &#39;px&#39;
            }
          }
          // 鼠标抬起时，清除绑定在文档上的mousemove和mouseup事件
          // 否则鼠标抬起后还可以继续拖拽方块
          document.onmouseup = function () {
            document.onmousemove = null
            document.onmouseup = null
            // 清除border
            dragDiv.style.borderStyle = &#39;&#39;
            dragDiv.style.borderColor = &#39;&#39;
            dragDiv.style.borderWidth = &#39;&#39;
          }
        }
        // 绑定鼠标按下事件
        dragDiv.addEventListener(&#39;mousedown&#39;, putDown, false)
      </script>
    
  

2. VUe uses js to implement drag and drop shuttle boxes

<template>
  <div>
    <h3 id="拖拽穿梭框">拖拽穿梭框</h3>
    <div>
      <div>
        <span>
          <span>{{ item.label }}</span>
          <span>X</span>          >
        </span>
      </div>
      <div>
        <span>
          <span>{{ item.label }}</span>
          <span>X</span>          >
        </span>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: "home",
  data() {
    return {
      leftData: [
        { label: "首页", id: 1 },
        { label: "咨询", id: 2 },
        { label: "生活", id: 3 },
        { label: "财富", id: 4 },
        { label: "我的", id: 5 },
      ],
      rightData: [{ label: "世界", id: 6 }],
      isMoveTrue: false,
      isMove: false,
      moveId: "",
    };
  },
  mounted() {},
  components: {},
  methods: {
    mousedown(index, val) {
      this.isMoveTrue = true;
      if (val == 1) {
        this.moveId = "mouse" + index;
      } else {
        this.moveId = "deleteMouse" + index;
      }
    },
    mousemove(event) {
      if (this.isMoveTrue) {
        this.isMove = true;
        document.getElementById(this.moveId).style.position = "absolute";
        document.getElementById(this.moveId).style.top = event.clientY + "px";
        document.getElementById(this.moveId).style.left = event.clientX + "px";
        document.getElementById(this.moveId).style.transform =
          "translate(-50%,-50%)";
      }
    },
    mouseup(item, val, index) {
      if (!this.isMove) {
        this.isMoveTrue = false;
        this.moveId = "";
      }
      if (this.isMoveTrue && val == 2) {
        this.$nextTick(() => {
          this.rightData.splice(index, 1);
          this.leftData.push(item);
        });
      } else if (this.isMoveTrue && val) {
        this.leftData.splice(index, 1);
        this.rightData.push(item);
      }
      document.getElementById(this.moveId).style.display = "none";
      this.isMoveTrue = false;
      this.isMove = false;
      this.moveId = "";
    },
    handerClickX(item, index, val) {
      if (val == 1) {
        this.leftData.splice(index, 1);
        this.rightData.push(item);
      } else {
        this.rightData.splice(index, 1);
        this.leftData.push(item);
      }
    },
  },
};
</script>

<style>
#home {
  display: flex;
  justify-content: space-around;
}
.tree-select-content {
  width: 40%;
  height: 300px;
  background: #f9faff;
  border: 1px solid #dee0ec;
  border-radius: 4px;
  display: flex;
  flex-wrap: wrap;
  align-content: baseline;
}
.select-content {
  width: max-content;
  height: 20px;
  padding: 1.6%;
  border: 1px solid #d6dbed;
  margin: 2% 1% 0;
  background: #ffffff;
  box-shadow: 0 0 8px 0 rgba(72, 119, 236, 0.1);
  border-radius: 4px;
}
.select-content:hover span {
  color: #4877ec;
}
.select-content:hover {
  cursor: pointer;
  background: #f8faff;
  border: 1px solid #3e75f4;
}
.select-text {
  font-size: 15px;
  color: #2e2f36;
  text-align: center;
  font-weight: 400;
}
.select-text-X {
  font-size: 15px;
  color: #4877ec;
  letter-spacing: 0;
  font-weight: 400;
  margin-left: 12px;
  cursor: pointer;
}
</style>

Rendering:

##3. Vue drag and drop component vuedraggable

vuedraggable is standard Component encapsulation, and draggable elements are placed on transition-group, and the transition animation is better.

How to use:

yarn add vuedraggable

import vuedraggable from 'vuedraggable';

When using it, you can bind local data in two directions through v-model. If you need to update or trigger an event monitored by the parent component, , you can emit it in updated().

Case:

<template>
  <div>
    <div>{{ drag ? "拖拽中" : "拖拽停止" }}</div>
    <!--使用draggable组件-->
    <draggable>
      <transition-group>
        <div>
          {{ element.name }}
        </div>
      </transition-group>
    </draggable>
    <div>
      <div>
        {{ color.text }}
      </div>
    </div>
  </div>
</template>
  <style>
/*被拖拽对象的样式*/
.item {
  padding: 6px;
  background-color: #fdfdfd;
  border: solid 1px #eee;
  margin-bottom: 10px;
  cursor: move;
}
/*选中样式*/
.chosen {
  border: solid 1px #3089dc !important;
}
</style>
  <script>
//导入draggable组件
import draggable from "vuedraggable";
export default {
  //注册draggable组件
  components: {
    draggable,
  },
  data() {
    return {
      drag: false,
      //定义要被拖拽对象的数组
      myArray: [
        { people: "cn", id: 10, name: "www.itxst.com" },
        { people: "cn", id: 20, name: "www.baidu.com" },
        { people: "cn", id: 30, name: "www.taobao.com" },
        { people: "us", id: 40, name: "www.yahoo.com" },
      ],
      colors: [
        {
          text: "Aquamarine",
        },
        {
          text: "Hotpink",
        },
        {
          text: "Gold",
        },
        {
          text: "Crimson",
        },
        {
          text: "Blueviolet",
        },
        {
          text: "Lightblue",
        },
        {
          text: "Cornflowerblue",
        },
        {
          text: "Skyblue",
        },
        {
          text: "Burlywood",
        },
      ],
    };
  },
  methods: {
    //开始拖拽事件
    onStart() {
      this.drag = true;
    },
    //拖拽结束事件
    onEnd() {
      this.drag = false;
    },
  },
};
</script>

4. Awe-dnd instruction encapsulation

The name of the npm package of vue-dragging is awe -dnd is not vue-dragging. The characteristic of this library is that it encapsulates v-dragging global instructions, and then uses global instructions to perform data binding, etc.

Compared with vuedraggable, awe-dnd does not have two-way binding (the absence of two-way binding here is not very rigorous, to be precise, there is no way to expose two-way binding), so it provides events. It is used to update the list when dragging ends (no need to manually update the list, in fact, two-way binding is implemented internally) or to trigger events listened by the parent component.

Installation dependencies:

npm install awe-dnd --save
yarn add awe-and

main.js

import VueDND from 'awe-dnd'

Vue.use(VueDND)

Case:

<template>
  <div>
    <div>
      <div>
        {{ color.text }}
      </div>
    </div>
  </div>
</template>
<style>
/*被拖拽对象的样式*/
.item {
  padding: 6px;
  background-color: #fdfdfd;
  border: solid 1px #eee;
  margin-bottom: 10px;
  cursor: move;
}
/*选中样式*/
.chosen {
  border: solid 1px #3089dc !important;
}
</style>
<script>
export default {
  data() {
    return {
      drag: false,
      colors: [
        {
          text: "Aquamarine",
        },
        {
          text: "Hotpink",
        },
        {
          text: "Gold",
        },
        {
          text: "Crimson",
        },
        {
          text: "Blueviolet",
        },
        {
          text: "Lightblue",
        },
        {
          text: "Cornflowerblue",
        },
        {
          text: "Skyblue",
        },
        {
          text: "Burlywood",
        },
      ],
    };
  },
  methods: {},
};
</script>

(Learning video sharing:

web front-end development, Basic programming video)

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