unarm massinput-buttons earlier

static/js/utils/massInput.js

@@ -46,6 +46,13 @@
       }
 
       massInputFormSubmitHandler = makeSubmitHandler();
+
+      // "unarm" submit buttons inside this massinput so browser
+      // uses correct submit button for form submission.
+      // contents of the massinput will be replaced either way,
+      // so unarming is no problem
+      unarmSubmitButtons(massInputFormSubmitHandler);
+
       massInputForm.addEventListener('submit', massInputFormSubmitHandler);
 
       // mark initialized
@@ -75,12 +82,6 @@
       }
 
       return function(event) {
-        // "unarm" submit buttons inside this massinput so browser
-        // uses correct submit button for form submission.
-        // contents of the massinput will be replaced either way,
-        // so unarming is no problem
-        unarmSubmitButtons();
-
         // check if event occured from either a mass input add/delete button or
         // from inside one of massinput's inputs (i.e. they are focused/active)
         var activeElement = element.querySelector(':focus, :active');
@@ -129,11 +130,13 @@
       };
     }
 
-    function unarmSubmitButtons() {
+    function unarmSubmitButtons(submitHandler) {
       var buttons = Array.from(element.querySelectorAll('button[type="submit"][name][value]'));
       buttons.forEach(function(button) {
         button.setAttribute('type', 'button');
         button.classList.add(MASS_INPUT_SUBMIT_BUTTON_CLASS);
+
+        button.addEventListener('click', submitHandler);
       });
     }
 
@@ -192,6 +195,12 @@
     function reset() {
       element.classList.remove(MASS_INPUT_INITIALIZED_CLASS);
       massInputForm.removeEventListener('submit', massInputFormSubmitHandler)
+
+      Array.from(element.querySelectorAll('.' + MASS_INPUT_SUBMIT_BUTTON_CLASS)).forEach(function(button) {
+        button.removeEventListener('click', submitHandler);
+        button.classList.remove(MASS_INPUT_SUBMIT_BUTTON_CLASS);
+        button.setAttribute('type', 'submit');
+      });
     }
 
     return init();