rsuite/src/utils/placementPolyfill.ts

A suite of react components

/**
 * placementPolyfill('bottomLeft');
 * output 'bottomStart'
 */

export default (placement: string) => {
  if (typeof placement === 'string') {
    return placement.replace(/Left|Top/, 'Start').replace(/Right|Bottom/, 'End');
  }
  return placement;
};