iview 二次封装DatePicker 绑定model 报错

Question

<Form :model="configMode" inline :label-width="configAll ? configAll.labelWidth : 80">
    <template v-for="(items, index) in configData">
        <template v-if="items.cut === 'input'" >
            <FormItem :label="items.label" :label-width="items.labelWidth" :key="index" >
                <Input v-model="configMode[items.model]" :placeholder="items.placeholder" :style="`width:${items.width || configAll.width}px`"></Input>
            </FormItem>
         </template>
        <template  v-if="items.cut === 'select'">
            <FormItem :label="items.label" :label-width="items.labelWidth" :key="index">
                <Select v-model="configMode[items.model]" :placeholder="items.placeholder" :style="`width:${items.width || configAll.width}px`">
                    <Option v-for="(option, ops) in items.options" :value="option.value" :key="ops+ 'o'">{{option.label}}</Option>
                </Select>
            </FormItem>
        </template>
        <template v-if="items.cut === 'picker'">
            <FormItem :label="items.label" :label-width="items.labelWidth" :key="index">
                <DatePicker 
               

                     

v-model="configMode[items.model]" 只要加上这句话就会报错

                    :type="items.type" 
                    :start-date = "new Date()"
                    :format="items.format"  
                    :placeholder="items.placeholder" 
                    :style="`width:${items.width || configAll.width}px`">
                </DatePicker>
            </FormItem>
        </template>
        <template v-if="items.cut === 'button'">
            <template  v-for="(item, indexs) in items.buttonArr"> 
                <FormItem :label-width="items.labelWidth || 40" :key="indexs + item.text">
                    <Button :type="item.type || 'primary'" @click="ventBus(item.evenName, configMode, item.attr)">{{item.text}}</Button>
                </FormItem>
            </template>
        </template>
    </template>
</Form>

错误如下
Error in render: "TypeError: date.getFullYear is not a function"
date.getFullYear is not a function