Made form fields required

templates/main.html

@@ -51,15 +51,15 @@
         {% if display_change_kWh == True %}
             <form action="{{ url_for('handle_change_kWh') }}" method="post">
                 Change cost per kWh: <input type="text" name="kWhprice">
-                <input type="submit">
+                <input type="submit" required>
             </form>
         {% endif %}
 
         {% if display_new_device_form == True %}
             <div class=".add_new_device_form">
                     <form action="{{ url_for('handle_new_device') }}" method="post">
-                        New device name: <input type="text" name="new_device_name"> <br>
-                        New device wattage: <input type="number" name="new_device_wattage"> <br>
+                        New device name: <input type="text" name="new_device_name" required> <br>
+                        New device wattage: <input type="number" name="new_device_wattage" required> <br>
                         <input type="submit">
                     </form>
             </div>