add solution keyboard

README.md

@@ -22,4 +22,4 @@ Make the `App` a class component with `pressedKey` in the `state`.
 - 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://A1eeex.github.io/react_keyboard/) and add it to the PR description.

src/App.tsx

@@ -1,7 +1,8 @@
 import React from 'react';
+import Message from './components/Message';
 
 export const App: React.FC = () => (
   <div className="App">
-    <p className="App__message">The last pressed key is [Enter]</p>
+    <Message />
   </div>
 );

src/components/Message.tsx

@@ -0,0 +1,37 @@
+import React from 'react';
+
+type State = {
+  currentKey: string | null;
+};
+
+class Message extends React.Component {
+  state: State = {
+    currentKey: null,
+  };
+
+  componentDidMount() {
+    document.addEventListener('keyup', (event: KeyboardEvent) => {
+      this.setState({ currentKey: event.key });
+    });
+  }
+
+  componentWillUnmount() {
+    document.removeEventListener('keyup', (event: KeyboardEvent) => {
+      this.setState({ currentKey: event.key });
+    });
+  }
+
+  render() {
+    const { currentKey } = this.state;
+
+    return (
+      <p className="App__message">
+        {currentKey
+          ? `The last pressed key is[${currentKey}]`
+          : 'Nothing was pressed yet'}
+      </p>
+    );
+  }
+}
+
+export default Message;