v-ripple API 
组件页面 
值 
| An object containing options for the ripple effect. class applies a custom class to the ripple, and can be used for changing color. center forces the ripple to originate from the center of the target instead of the cursor position. | 
修饰符 
| center | 
| Makes it so that the ripple originates from the center of the element, instead where the user clicked on it. | 
| circle | 
| Changes the ripple behavior to better match circular elements. | 
| stop | 
| Prevents ripples from being triggered on any other elements when the click event is bubbling up. |