show field area pages list inthe form

app/javascript/submission_form/appears_on.vue

@@ -0,0 +1,51 @@
+<template>
+  <div
+    v-if="uniqueAreas.length > 1"
+    class="mb-2"
+  >
+    <div class="flex space-x-1 text-sm ml-1 -mt-3">
+      <span>
+        {{ t('appears_on') }}:
+      </span>
+      <a
+        v-for="area in uniqueAreas"
+        :key="area.uuid"
+        href="#"
+        class="link pr-0.5"
+        @click.prevent="scrollIntoArea(area)"
+      >
+        {{ t('page') }} <template v-if="isMultipleDocs">{{ attachmentUuids.indexOf(area.attachment_uuid) + 1 }}-</template>{{ area.page + 1 }}
+      </a>
+    </div>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'AppearsOn',
+  inject: ['t', 'scrollIntoArea'],
+  props: {
+    field: {
+      type: Object,
+      required: true
+    }
+  },
+  computed: {
+    isMultipleDocs () {
+      return this.attachmentUuids.length > 1
+    },
+    attachmentUuids () {
+      return [...new Set(this.uniqueAreas.map((e) => e.attachment_uuid))]
+    },
+    uniqueAreas () {
+      const areas = {}
+
+      this.field.areas.forEach((area) => {
+        areas[area.attachment_uuid + area.page] ||= area
+      })
+
+      return Object.values(areas).slice(0, 6)
+    }
+  }
+}
+</script>