mingde-bd/application/admin/view/common/cascader2.html

<div id="{$name}">
    <input type="hidden" name="{$name}" value="">
    <el-cascader
        v-model="value"
        :options="options"
        :props="props"
        collapse-tags
        clearable
        style="width:100%"
    ></el-cascader>
</div>
<script>
    new Vue({
        el: '#{$name}',
        data: function() {
            return {
                props: { multiple: true },
                // props:{
                //     value: 'id',
                //     label: 'title',
                //     children: 'child'
                // },
                options: {:json_encode($lists)},
                value: {:json_encode($val)}
            }
        },
        watch: {
            value: function (newVal, oldVal) {
                $('input[name={$name}]').val(newVal.join(','));
            }
        },
        created(){
            const vals = this.value;
            $('input[name={$name}]').val(vals.join(','));
        }
    })
</script>