Add types for scroll track

src/components/ScrollTrack/ScrollTrack.d.ts

@@ -64,6 +64,34 @@ export interface ScrollTrackProps {
   }
 }
 
-declare const ScrollTrack: React.ComponentClass<ScrollTrackProps>
+interface TrackProps {
+  showLeftArrow: boolean
+  showRightArrow: boolean
+  left: number
+  isSliding: boolean
+  parentWidth: number | false
+  trackWidth: number | false
+  trackBounds: DOMRect | false
+}
+
+export interface WithEqualWidthTrackInjectedProps {
+  startIndex: number
+  lastIndex: number
+  trackProps: TrackProps
+}
+
+export interface WithTrackProps extends TrackProps {}
+
+type GetChildWidth = (arguments: { trackProps: TrackProps }) => number
+
+type EqualWidthTrack = (
+  childWidth: number | GetChildWidth
+) => <T extends WithEqualWidthTrackInjectedProps>(
+  wrappedComponent: React.ComponentType<T>
+) => React.ComponentType<Omit<T, keyof WithEqualWidthTrackInjectedProps>>
+
+declare const ScrollTrack: React.ComponentClass<ScrollTrackProps> & {
+  equalWidthTrack: EqualWidthTrack
+}
 
 export default ScrollTrack

src/components/ScrollTrack/ScrollTrackPropTypes.js

@@ -2,6 +2,7 @@ import PropTypes from 'prop-types'
 
 const propTypes = {
   trackProps: PropTypes.shape({
+    isSliding: PropTypes.bool,
     showLeftArrow: PropTypes.bool,
     showRightArrow: PropTypes.bool,
     left: PropTypes.number,

src/index.d.ts

@@ -23,7 +23,10 @@ import SelectionPills from './components/SelectionPills/SelectionPills'
 import Normalize from './styles/Normalize'
 import responsive from './styles/responsive'
 import Row from './components/Grid/Row'
-import ScrollTrack from './components/ScrollTrack/ScrollTrack'
+import ScrollTrack, {
+  WithEqualWidthTrackInjectedProps,
+  WithTrackProps,
+} from './components/ScrollTrack/ScrollTrack'
 import SetStyles from './styles/SetStyles'
 import spacing from './styles/spacing'
 import PhoneNumberField from './components/Forms/PhoneNumberField'
@@ -141,6 +144,8 @@ export {
   SelectionPill,
   SelectionPills,
   ScrollTrack,
+  WithTrackProps,
+  WithEqualWidthTrackInjectedProps,
   Menu,
   MenuItem,
   MenuDivider,