工作经验-组件封装(拖拽排序组件)

子组件``

  <div id="box" :style="boxStyle">
    <div v-for="item in modelValue" :key="item.id">
      <slot :msg="item"></slot>
    </div>
  </div>
</template>
<script setup lang="ts">
import Sortable from "sortablejs";
import {
  defineEmits,
  defineProps,
  nextTick,
  onMounted,
  defineExpose,
  withDefaults,
  computed,
} from "vue";

//内部interface type类型定义
interface IModelValue {
  id: string;
  index: number;
  name: string;
}
type ILayout = "x" | "y" | "X" | "Y";
interface IProps {
  modelValue: IModelValue[];
  layout?: ILayout;
}

// props 定义：对外选项
const props = withDefaults(defineProps<IProps>(), {
  layout: "x",
});

// emit 定义：自定义事件
const emits = defineEmits(["update:modelValue"]);

//computed定义:计算属性
const boxStyle = computed(() => {
  if (props.layout == "y" || props.layout == "Y") {
    return "flex-direction:column;height:100%;width:fit-content";
  } else {
    return "flex-direction:row;width:100%;height:fit-content";
  }
});

//生命周期函数
onMounted(() => {
  initDragAble();
});

//自定义函数
//初始化拖拽元素
function initDragAble() {
  nextTick(() => {
    const el = document.querySelector("#box");
    const sortable = Sortable.create(el as HTMLElement, {
      // 在拖拽过程中会有动画产生
      animation: 150,
      easing: "cubic-bezier(1, 0, 0, 1)",
      // 是否可以进行拖拽排序，为 true 时，不能进行排序，函数不会被触发，为 false 时， 可以进行排序
      disabled: false,
      // 为拖拽时产生的副本添加一个class
      ghostClass: "newclass",
      // 为选中的元素添加一个class
      chosenClass: "addclass",
      // 禁用html5原有的样式
      forceFallback: true,
      // 排序发生变化时调用的函数
      onUpdate: function (event) {
        const newVal = props.modelValue;
        const oldItem = newVal[event.oldIndex as number];
        newVal[event.oldIndex as number] = newVal[event.newIndex as number];
        newVal[event.newIndex as number] = oldItem;
        //将数据传给父组件
        emits("update:modelValue", newVal);
      },
    });
  });
}
defineExpose({
  boxStyle,
});
</script>
<style scoped>
#box {
  display: flex;
  /* width: 100%; */
  /* height: 100%; */
  overflow: scroll;
  overflow-y: none;
}
</style>


父组件
```javascript
在这里插入代码片
<template>
  <div class="container">
    <TableComponent v-model="data.tabList" layout="x">
      <template v-slot="scope">
        <div class="items">{
   { scope.msg.name }}</div>
      </template>
    </TableComponent>
  </div>
</template>
<script setup lang="ts">
import TableComponent from "@/components/TabComponent.vue";
import { reactive, watch } from "vue";

interface ITabItem {
  id: string;
  index: number;
  name: string;
}

interface IData {
  tabList: ITabItem[];
}

const data = reactive<IData>({
  tabList: [
    {
      id: "ie",
      index: 4,
      name: "e",
    },
    {
      id: "id",
      index: 3,
      name: "d",
    },
    {
      id: "ic",
      index: 2,
      name: "c",
    },
    {
      id: "ib",
      index: 1,
      name: "b",
    },
    {
      id: "ia",
      index: 0,
      name: "a",
    },
  ],
});

watch(
  () => data.tabList,
  (val) => {
    console.log("更新了", val);
  },
  {
    deep: true,
  }
);

defineExpose({
  data,
});
</script>
<style scoped>
.container {
  width: 300px;
  height: 300px;
  background-color: green;
}
.items {
  width: 100px;
  height: 100px;
  background-color: red;
  border: 1px solid black;
}
</style>

注意点:引入第三方库的时候需要自定义生命类型 可以安装类型声明文件， npm i @types/第三方库包名 --save-dev