keep working on the like button

client/script.js

@@ -0,0 +1,15 @@
+function like(id) {
+
+    const usernameBox = document.getElementById('username');
+    const passwordBox = document.getElementById('password');
+
+    const formData = new FormData();
+    formData.append('username', usernameBox.value);
+    formData.append('password', passwordBox.value);
+    formData.append('post', id);
+
+    fetch('/like', {
+      method: 'POST',
+      body: formData
+    });
+}