cascader卡顿

 <el-cascader :options="categoryTree" :props="props" collapse-tags v-model="category" style="width:100%" @change="changeCategory"
              @visible-change="visibleChange">
            </el-cascader>

　　增加@visible-change="visibleChange"

 visibleChange (val) {
      this.$nextTick(() => {
        const $el = document.querySelectorAll('.el-cascader-panel .el-cascader-node[aria-owns]');
        Array.from($el).map((item) => item.removeAttribute('aria-owns'));
      })
    },

解决方案

.el-cascader-node 元素生成后移除aria-owns属性