Add basic typings.

package.json

@@ -29,6 +29,7 @@
     "test:watch": "watch 'npm run test' ./test ./src"
   },
   "devDependencies": {
+    "@types/react": "^16.0.38",
     "babel-cli": "^6.6.4",
     "babel-core": "^6.7.4",
     "babel-eslint": "^6.0.2",
@@ -68,5 +69,6 @@
   "files": [
     "lib"
   ],
-  "main": "lib/index.js"
+  "main": "lib/index.js",
+  "types": "types/react-datasheet.d.ts"
 }

types/react-datasheet.d.ts

@@ -0,0 +1,43 @@
+import {PureComponent, Component} from "react";
+
+declare namespace ReactDataSheet {
+    export interface Cell {
+        readOnly?: boolean;
+        key?: string | undefined;
+        className?: string | undefined;
+        component?: Component<any, any>;
+        forceComponent?: boolean;
+        colSpan?: number;
+        rowSpan?: number;
+    }
+
+    export interface DataSheetProps<T extends Cell> {
+        data: T[][];
+        className?: string;
+        valueRenderer: (cell: T) => string | number | void;
+        dataRenderer?: (cell: T) => string | number | void;
+        onChange?: (cell: T, row: number, col: number, newValue: string) => any;
+        onContextMenu?: (event: MouseEvent, cell: T, i : number, j: number) => any;
+        onCellsChanged?: (arrayOfChanges: {cell: T, row: number, col: number, newValue: string}[]) => void;
+    }
+
+    export interface CellReference {
+        row: number;
+        col: number;
+    }
+
+    export interface DataSheetState {
+        start?: CellReference;
+        end?: CellReference;
+        selecting?: boolean;
+        forceEdit?: boolean;
+        editing?: CellReference;
+        clear?: CellReference;
+    }
+}
+
+declare class ReactDataSheet<T extends ReactDataSheet.Cell> extends PureComponent<ReactDataSheet.DataSheetProps<T>, ReactDataSheet.DataSheetState> {
+    getSelectedCells(data: T[][], start: ReactDataSheet.CellReference, end: ReactDataSheet.CellReference): {cell: T, row: number, col: number};
+}
+
+export default ReactDataSheet;

yarn.lock

@@ -2,6 +2,10 @@
 # yarn lockfile v1
 
 
+"@types/react@^16.0.38":
+  version "16.0.38"
+  resolved "https://registry.yarnpkg.com/@types/react/-/react-16.0.38.tgz#76617433ea10274505f60bb86eddfdd0476ffdc2"
+
 abab@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/abab/-/abab-1.0.3.tgz#b81de5f7274ec4e756d797cd834f303642724e5d"