communitydebate/static/fileupload_formset: add event listener to dyna…

…mically added fileupload forms

euth/communitydebate/static/js/fileupload_formset.js

@@ -1,4 +1,5 @@
 /* global $ django */
+import { showFileName } from '../../../../euth_wagtail/assets/js/euth_wagtail';
 (function (init) {
   document.addEventListener('DOMContentLoaded', init, false)
   document.addEventListener('a4.embed.ready', init, false)
@@ -21,10 +22,12 @@
 
   DynamicFormSet.prototype.addForm = function () {
     if (this.total < this.maxNum) {
+      var id = this.total
       this.total += 1
       this.$totalInput.val(this.total)
-      var newForm = getNewForm(this.$formTemplate, this.total - 1)
+      var newForm = getNewForm(this.$formTemplate, id)
       $(newForm).insertBefore(this.$formTemplate)
+      document.getElementById(this.prefix + '-' + id.toString() + '-document').addEventListener('change', showFileName, false)
     } else {
       var text = django.gettext('Maximum number of upload documents reached.')
       $('#error-max-num-forms').html('<ul class="errorlist"><li>' + text + '</li></ul>')