fileOverview import React , { PureComponent } from 'react' ; import classNames from 'classnames' ; import { PresentationAttributesWithProps , adaptEventHandlers , filterProps } from '../util/types' ; interface DotProps { className ? : string ; cx ? : number ; cy ? : number ; r ? : number ; } export type Props = PresentationAttributesWithProps < DotProps , SVGCircleElement > & DotProps ; export class Dot extends PureComponent < Props > { render ( ) { const { cx , cy , r , className } = this . props ; const layerClass = classNames ( 'recharts-dot' , className ) ; if ( cx === + cx && cy === + cy && r === + r ) { return ( < circle { ... filterProps ( this . props ) } { ... adaptEventHandlers ( this . props ) } className = { layerClass } cx = { cx } cy = { cy } r = { r } / > ) ; } return null ; } }