text: // @flow
  
  import * as React from "react";
  import cn from "classnames";
  
  type Props = {|
    +children?: React.Node,
    +className?: string,
    +backgroundURL?: string,
  |};
  
  function CardHeader({
    className,
    children,
    backgroundURL = "",
  }: Props): React.Node {
    const classes = cn("card-header", className);
  
    return (
      <div
        className={classes}
        style={
          backgroundURL
            ? Object.assign({
                backgroundImage: `url(${backgroundURL})`,
              })
            : null
        }
      >
        {children}
      </div>
    );
  }
  
  CardHeader.displayName = "Card.Header";
  
  export default CardHeader;
  