Add type declarations for TypeScript support.

package.json

@@ -22,13 +22,15 @@
     "react-dom": ">= 16.2.0"
   },
   "main": "lib/react-authorization.js",
+  "types": "types/react-authorization.d.ts",
   "devDependencies": {
     "@babel/cli": "^7.4.4",
     "@babel/core": "^7.4.5",
     "@babel/preset-env": "^7.4.5",
     "@babel/preset-react": "^7.0.0",
     "@babel/preset-stage-0": "^7.0.0",
     "@babel/plugin-transform-runtime": "^7.4.4",
+    "@types/react": "^16.8.19",
     "babel-eslint": "^10.0.1",
     "babel-jest": "^24.8.0",
     "babel-loader": "^8.0.6",
@@ -44,7 +46,8 @@
     "webpack-node-externals": "^1.7.2"
   },
   "files": [
-    "lib"
+    "lib",
+    "types"
   ],
   "scripts": {
     "test": "jest --env=jsdom",

types/react-authorization.d.ts

@@ -0,0 +1,38 @@
+import * as React from "react";
+import IfAllGrantedProps = ReactAuthorization.IfAllGrantedProps;
+import IfAnyGrantedProps = ReactAuthorization.IfAnyGrantedProps;
+import IfGrantedProps = ReactAuthorization.IfGrantedProps;
+import IfNoneGrantedProps = ReactAuthorization.IfNoneGrantedProps;
+
+export namespace ReactAuthorization {
+    interface CommonProps {
+        actual?: string | string[];
+        unauthorized?: React.ReactNode | null;
+    }
+
+    interface IfAllGrantedProps extends CommonProps {
+        expected: string[];
+    }
+
+    interface IfAnyGrantedProps extends CommonProps {
+        expected: string[];
+    }
+
+    interface IfGrantedProps extends CommonProps {
+        expected: string;
+    }
+
+    interface IfNoneGrantedProps extends CommonProps {
+        expected?: string | string[];
+    }
+}
+
+declare const IfAllGranted: React.FC<IfAllGrantedProps>;
+
+declare const IfAnyGranted: React.FC<IfAnyGrantedProps>;
+
+declare const IfGranted: React.FC<IfGrantedProps>;
+
+declare const IfNoneGranted: React.FC<IfNoneGrantedProps>;
+
+export {IfAllGranted, IfAnyGranted, IfGranted, IfNoneGranted};