created README.md

Author: zancheema

Javascript/Virtual Mirror/README.md

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+# 🪞 Webcam Mirror — JavaScript Demo
+
+A lightweight web app that uses your device’s **webcam** and flips the video feed **horizontally**, so it behaves just like a real mirror.  
+Built with plain **HTML**, **CSS**, and **JavaScript** — no frameworks required.
+
+---
+
+## 📸 Features
+
+- 🔁 **Real mirror effect** — flips the camera preview horizontally.
+- 🎥 **Camera selection** — choose between multiple cameras (front/back on mobile).
+- 🖼️ **Snapshot capture** — take photos that respect the mirror orientation.
+- 💾 **Instant download** — download your mirrored photo as a `.png` file.
+- ⚙️ **Toggle mirroring** — turn the mirror effect on or off anytime.
+- 🌗 **Dark UI** — modern, clean, and responsive design.
+
+---
+
+## 🚀 Live Demo
+
+You can run this app locally by opening the HTML file directly in a browser that supports **`getUserMedia()`** (most modern browsers).
+
+---
+
+## 🧠 How It Works
+
+The app uses the **WebRTC API** (`navigator.mediaDevices.getUserMedia`) to access your webcam stream and display it in a `<video>` element.  
+CSS is used to flip the live preview horizontally using:
+
+```css
+video {
+  transform: scaleX(-1);
+}