refactor: minor updates

Author: Lodin

src/index.tsx

@@ -232,7 +232,7 @@ export default class Tree extends React.Component<TreeProps, TreeState> {
   }
 
   /** See Grid#getOffsetForCell */
-  public getOffsetForRow({alignment, index}: {alignment: Alignment, index: number}): number {
+  public getOffsetForRow({alignment, index}: {alignment?: Alignment, index?: number}): number {
     if (this.grid) {
       const {scrollTop} = this.grid.getOffsetForCell({
         alignment,
@@ -276,7 +276,7 @@ export default class Tree extends React.Component<TreeProps, TreeState> {
   /**
    * Recomputes Tree component basing on update type.
    *
-   * Method calls "nodeGetter" internally and flattens tree structure to an array. Depending on "update" value, it runs
+   * Method calls "nodeGetter" internally and flattens tree structure to an array. Depending on "update" value it runs
    * one of the following algorithms:
    * 1) Update.NodesAndOpenness. Requires full node metadata. Updates order, number and rendering data of all
    * nodes. Overrides current openness state with "openedByDefault" value.

src/types.d.ts

@@ -15,7 +15,7 @@ export interface Node<T = any> {
   height?: number;
 
   /**
-   * Current node openness state. Will set node openness state on first rendering or if :update is set to
+   * Current node openness state. Will set node openness state on first rendering or if "update" is set to
    * Update.NodeAndOpenness.
    */
   isOpenedByDefault: boolean;
@@ -52,12 +52,12 @@ export interface RowRendererParams<T = any> {
 
   /**
    * Inline styles for toggle control. Contains two styles:
-   * 1) a "controlStyle" property set in Tree component and.
-   * 2) default styles necessary for displaying control
+   * 1) a "controlStyle" property set in Tree component,
+   * 2) default styles necessary for displaying control.
    */
   controlStyle: CSSProperties;
 
-  /** Optional HTML id. It will be an "id" property set in Tree component */
+  /** Optional HTML id (an "id" property set in Tree component) */
   id: string;
 
   /** Current row index in the list of all rows */