Solution

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://YarikKedrych.github.io/react_keyboard/) and add it to the PR description.

src/ShowCurrentKey.tsx

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

src/index.tsx

@@ -1,6 +1,8 @@
 import { createRoot } from 'react-dom/client';
-import { App } from './App';
-
+import { ShowCurrentKey } from './ShowCurrentKey';
 import './index.scss';
+import React from 'react';
 
-createRoot(document.getElementById('root') as HTMLElement).render(<App />);
+createRoot(document.getElementById('root') as HTMLElement).render(
+  <ShowCurrentKey />,
+);