Fix checking for undefined behaviour when viewing a task

src/components/tasks/partials/heading.vue

@@ -1,7 +1,7 @@
 <template>
 	<div class="heading">
 		<h1 class="title task-id">
-			{{ task.getTextIdentifier() }}
+			{{ task.getTextIdentifier && task.getTextIdentifier() ? task.getTextIdentifier() : '' }}
 		</h1>
 		<div class="is-done" v-if="task.done">Done</div>
 		<h1

src/main.js

@@ -182,6 +182,10 @@ Vue.component('card', Card)
 Vue.mixin({
 	methods: {
 		formatDateSince: date => {
+			if (date === null) {
+				return ''
+			}
+
 			if (typeof date === 'string') {
 				date = new Date(date)
 			}
@@ -198,6 +202,10 @@ Vue.mixin({
 			return formatted
 		},
 		formatDate: date => {
+			if (date === null) {
+				return ''
+			}
+
 			if (typeof date === 'string') {
 				date = new Date(date)
 			}