add task solution

README.md

@@ -9,17 +9,20 @@ Make the `App` a class component with `pressedKey` in the `state`.
 - before any key was pressed show the `Nothing was pressed yet` message;
 - when a key is pressed show a `The last pressed key is [key]` message;
 - use `componentDidMount` to add `keyup` handler:
+
     ```ts
     // DON'T import KeyboardEvent from React, because it is a regular event
     document.addEventListener('keyup', (event: KeyboardEvent) => {
       console.log(event.key);
     });
     ```
+
 - use `removeEventListener` to remove a global handler in `componentWillUnmount`.
 
 ## Instructions
+
 - Install Prettier Extention and use this [VSCode settings](https://mate-academy.github.io/fe-program/tools/vscode/settings.json) to enable format on save.
 - Implement a solution following the [React task guideline](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Use the [React TypeScript cheat sheet](https://mate-academy.github.io/fe-program/js/extra/react-typescript).
 - Open one more terminal and run tests with `npm test` to ensure your solution is correct.
-- Replace `<your_account>` with your Github username in the [DEMO LINK](https://<your_account>.github.io/react_keyboard/) and add it to the PR description.
+- Replace `<your_account>` with your Github username in the [DEMO LINK](https://ZakZh.github.io/react_keyboard/) and add it to the PR description.

src/App.tsx

@@ -1,7 +1,26 @@
-import React from 'react';
+import React, { useState, useEffect } from 'react';
 
-export const App: React.FC = () => (
-  <div className="App">
-    <p className="App__message">The last pressed key is [Enter]</p>
-  </div>
-);
+export const App: React.FC = () => {
+  const [key, setKey] = useState('');
+
+  useEffect(() => {
+    const handleKeyBoardEvent = (event: KeyboardEvent) => {
+      event.preventDefault();
+      setKey(event.key);
+    };
+
+    document.addEventListener('keyup', handleKeyBoardEvent);
+
+    return () => {
+      document.removeEventListener('keyup', handleKeyBoardEvent);
+    };
+  });
+
+  return (
+    <div className="App">
+      <p className="App__message">
+        {key ? `The last pressed key is [${key}]` : `Nothing was pressed yet`}
+      </p>
+    </div>
+  );
+};