type | can be set to `primary``ghost``dashed``danger`(added in 2.7) or omitted (meaning `default`) | string | `default`
htmlType | set the original html `type` of `button`, see: [MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/button#attr-type) | string | `button`
`<Button>Hello world!</Button>` will be rendered into `<button><span>Hello world!</span></button>`, and all the properties which are not listed above will be transferred to the `<button>` tag.