<j-modal :visible="visible" :title="title" @cancel="close" :fullscreen="true">
..........
<span slot="footer">
<div :key="row.KfjqFlag" v-if="row.KfjqFlag==''||row.KfjqFlag=='待办'">
<el-button @click="visible = false">取 消</el-button>
<el-button v-if="orderTypeDesc != '优化'" type="primary" @click="onSubmit('0')" :loading="confirmLoading0"
>暂 存</el-button
>
<el-button v-if="orderTypeDesc != '优化'" type="primary" @click="onSubmit('1')" :loading="confirmLoading1"
>确 定</el-button
>
<el-button v-if="orderTypeDesc == '优化'" type="primary" @click="onFlow()" :loading="confirmLoading"
>提 交</el-button
>
</div>
</span>
</j-modal>
因为vue虚拟dom机制，会尽量复用已存在相同节点元素而不会重新渲染，导致使用v-if没有达到预期效果
方法：
使用div元素将slot插槽内容包裹起来，并在div元素上使用key，插槽内容才会重新渲染 `
标签：slot,footer,插槽,页脚,modal,div From： https://www.cnblogs.com/snowhite/p/18420675