init

user/plugins/admin/themes/grav/app/pages/page/unset.js

@@ -0,0 +1,18 @@
+import $ from 'jquery';
+
+$(document).on('click', '.dz-unset', function() {
+
+    const file_upload = $(this).closest('.files-upload');
+    $(this).closest('.dz-image-preview').remove();
+    const unset_image = $(this).closest('.dz-image-preview').find('[data-dz-name]').text().trim();
+    const images = JSON.parse(file_upload.find('input[data-grav-field="hidden"]').val()) || {};
+    let image_array = {};
+
+    $.each(images, function(ind, obj) {
+        if (!ind.endsWith(unset_image)) {
+            image_array[ind] = obj;
+        }
+    });
+
+    file_upload.find('input[data-grav-field="hidden"]').val(JSON.stringify(image_array));
+});