diff --git a/99-Tree Shaking for Unused Code/index.html b/99-Tree Shaking for Unused Code/index.html
new file mode 100644
index 0000000..0601d82
--- /dev/null
+++ b/99-Tree Shaking for Unused Code/index.html	
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="UTF-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+        <link rel="stylesheet" href="styles.css" />
+        <title>Tree Shaking App</title>
+    </head>
+    <body>
+        <div class="container">
+            <h1>Tree Shaking App</h1>
+            <textarea
+                id="inputCode"
+                placeholder="Paste your JavaScript code here..."
+            ></textarea>
+            <button onclick="performTreeShaking()">Perform Tree Shaking</button>
+            <div id="outputCode"></div>
+        </div>
+
+        <script src="script.js"></script>
+    </body>
+</html>
diff --git a/99-Tree Shaking for Unused Code/script.js b/99-Tree Shaking for Unused Code/script.js
new file mode 100644
index 0000000..00a360a
--- /dev/null
+++ b/99-Tree Shaking for Unused Code/script.js	
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+function performTreeShaking() {
+    const inputCode = document.getElementById("inputCode").value;
+
+    if (!inputCode.trim()) {
+        alert("Please enter JavaScript code for tree shaking.");
+        return;
+    }
+
+    // In a real-world scenario, you would use a build tool like Webpack with Babel for tree shaking.
+    // Here, we'll use a simplified example to illustrate the process.
+
+    try {
+        const treeShakenCode = treeShakeCode(inputCode);
+        displayResult(treeShakenCode);
+    } catch (error) {
+        alert(`Error during tree shaking: ${error.message}`);
+    }
+}
+
+function treeShakeCode(code) {
+    // Placeholder for tree shaking logic using Babel
+    // In practice, you'd need a build tool like Webpack with Babel and proper configuration for tree shaking.
+    // Here, we'll use a simple logic to illustrate the concept.
+
+    const { transform } = require("@babel/core");
+    const presetEnv = require("@babel/preset-env");
+
+    const result = transform(code, {
+        presets: [
+            [presetEnv, { modules: false }], // Set modules to false to enable tree shaking
+        ],
+    });
+
+    if (result && result.code) {
+        return result.code;
+    } else {
+        throw new Error("Failed to perform tree shaking.");
+    }
+}
+
+function displayResult(result) {
+    const outputCode = document.getElementById("outputCode");
+    outputCode.textContent = result;
+}
diff --git a/99-Tree Shaking for Unused Code/styles.css b/99-Tree Shaking for Unused Code/styles.css
new file mode 100644
index 0000000..d1e4bf8
--- /dev/null
+++ b/99-Tree Shaking for Unused Code/styles.css	
@@ -0,0 +1,29 @@
+body {
+    font-family: Arial, sans-serif;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    height: 100vh;
+    margin: 0;
+}
+
+.container {
+    text-align: center;
+}
+
+textarea {
+    width: 100%;
+    height: 150px;
+    margin: 10px 0;
+}
+
+button {
+    padding: 10px 20px;
+    font-size: 16px;
+    margin: 10px;
+}
+
+#outputCode {
+    margin-top: 20px;
+    font-size: 18px;
+}
