What problem does this feature solve?

now the dynamic component the attribute of "is" must be a html tag or a componet tag,
sometimes , I want the dynamic component the attribute of "is" is empty
such as

<component :is="showTip? 'el-tootip':''template"  >
<el-button>button</el-button>
</compnent>

the example I want if the showTip is true, the button will be wrapped by a tooltip component
else if the showTip is false, there is nothing wrapped the button
so I want vue can provide the component :is with empty
现状是 动态组件 component :is的 is属性只能是 html标签或者已经注册的组件标签
但有时 需求想 is是个空值,
比如有这样的需求

<component :is="showTip? 'el-tootip':''template"  >
<el-button>button</el-button>
</compnent>

给一个button添加tooltip功能, 提供一个 showTip的字段, 如果为true则 则button组件会被一个tooltip组件包裹, 如果此字段为false则不会被任何元素包裹,
所以希望vue能够提供 动态组件 is属性是空值

What does the proposed API look like?

<component :is="showTip? 'el-tootip':''template"  >
<el-button>button</el-button>
</compnent>

<component :is="showTip? 'el-tootip':''"  >
<el-button>button</el-button>
</compnent>