[JavaScript知识库]vue+js多选删除li

//全选
<van-button type="primary" size="small" @click="delMuch">删除</van-button>
//列表
<li v-for="(item, index) in titles" :key="index">
    <van-swipe-cell>
      <p
        style="
          display: flex;
          justify-content: space-between;
          align-items: center;
        "
      >
        <span
          style="
            display: flex;
            justify-content: flex-end;
            align-items: center;
          "
        >
          <input
            type="checkbox"
            :value="item.id"
            v-model="selectArr"
          />
          <span @click="clickLi(item)">{{ item.name }}</span>
        </span>
      </p>
      <template slot="right">
        <van-button
          type="primarAy"
          size="normal"
          @click="deleteList(item)"
          >删除</van-button
        >
      </template>
    </van-swipe-cell>
</li>

data() {
  return {
    titles:[]
    selectArr: [],
},
methods:{
  //多选
  calculatAll(event) {
    var _this = this;
    console.log(event.currentTarget);
    if (!event.currentTarget.checked) {
      this.selectArr = [];
    } else {
      //实现全选
      _this.selectArr = [];
      _this.titles.forEach(function (item, i) {
        _this.selectArr.push(item.fileId);
      });
      console.log(_this.selectArr);
    }
  },
  // 多选删除
  delMuch() {
    this.Dialog.confirm({
      message: "确定删除吗？",
    })
      .then(() => {
         let arr = [];
         var len = this.titles.length;
         for (var i = 0; i < len; i++) {
           var fileId = this.titles[i].fileId;
           if (this.selectArr.indexOf(fileId) >= 0) {
             // this.selectArr.indexOf(i),
             console.log("i", this.selectArr.indexOf(fileId));
           } else {
             arr.push(this.titles[i]);
           }
         }
         this.titles = arr;
         this.selectArr = [];
      })
      .catch((res) => {
        this.Toast("未知错误");
      });
  },
}

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