Add Fibonacci generator application with HTML, CSS, and JavaScript implementation

JavaScript/fibonacci/fibonacci.js

@@ -0,0 +1,19 @@
+function generateFibonacci(n) {
+    if (n <= 0) return [];
+    if (n === 1) return [0];
+    if (n === 2) return [0, 1];
+
+    const fib = [0, 1];
+    for (let i = 2; i < n; i++) {
+        fib.push(fib[i - 1] + fib[i - 2]);
+    }
+    return fib;
+}
+
+function displayFibonacci() {
+    const n = parseInt(document.getElementById('fibonacciInput').value);
+    const result = generateFibonacci(n);
+    document.getElementById('fibonacciResult').innerText = result.join(', ');
+}
+
+document.getElementById('generateButton').addEventListener('click', displayFibonacci);