jili2/application/admin/view/common/select2.html

<div id="{$name}">
    <input type="hidden" name="{$name}" v-model="value.join(',')">
    <input type="hidden" name="{$name1}" v-model="value1.join(',')">

    <el-select clearable filterable multiple v-model="value" placeholder="请选择分类">
        <el-option
                v-for="item in options"
                :key="item.id"
                :label="item.title"
                :value="item.id.toString()">
        </el-option>
    </el-select>
    </br>
    </br>
    <el-select
               clearable filterable
               v-model="value1"
               multiple
               collapse-tags

               placeholder="选择{$title}">
        <el-option
                v-for="item in options1"
                :key="item.id"
                :label="item.title"
                :value="item.id.toString()">
        </el-option>
    </el-select>
</div>
<script>
    new Vue({
        el: '#{$name}',
        data: function() {
            return {
                options: {:json_encode($lists)},
                value:{:json_encode($value)},
                options1:{:json_encode($options1)},
                value1:{:json_encode($value1)},
        }
        },
        watch: {
            value: function (newVal, oldVal) {

                var that = this;
                $.post('{$url}',{id:newVal},function (res) {
                    that.options1 = res.data;
                    that.value1 = [];

                })
                $('input[name={$name}]').val(newVal.join(','));
            },
            value1: function (newVal, oldVal) {
                $('input[name={$name}]').val(newVal.join(','));

            }
        }
    })
</script>