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flask-test/static/script.js

+document.addEventListener("DOMContentLoaded", function() {
+    let countdown = 5; // Needs to be updated if fetch time changes
+    let countdownElement = document.getElementById("countdown");
+
+    function fetchReturns() {
+        fetch('/returns') 
+            .then(response => response.json())
+            .then(data => {
+                let container = document.getElementById("returns-container");
+                container.innerHTML = ""; 
+
+                data.returns.forEach(ret => {
+                    let p = document.createElement("p");
+                    p.textContent = `${ret.id} - ${ret.timestamp}`;
+                    container.appendChild(p);
+                });
+
+                countdown = 5; 
+            })
+            .catch(error => console.error("Error fetching returns:", error));
+    }
+
+    // Function to update countdown timer
+    function updateCountdown() {
+        countdownElement.textContent = countdown;
+        countdown--;
+
+        if (countdown < 0) {
+            countdown = 5; // Reset 
+        }
+    }
+
+    // 5000ms > 5 seconds
+    setInterval(fetchReturns, 5000);
+    setInterval(updateCountdown, 1000); 
+    // Initial fetch
+    fetchReturns();
+});