diff --git a/packages/ui-default/.eslintrc.js b/packages/ui-default/.eslintrc.js
index a0a0e1437..8b4b92abd 100644
--- a/packages/ui-default/.eslintrc.js
+++ b/packages/ui-default/.eslintrc.js
@@ -59,6 +59,7 @@ module.exports = {
       2,
       { SwitchCase: 1 },
     ],
+    'github/array-foreach': 'off',
     'function-paren-newline': 'off',
     'no-mixed-operators': 'off',
     'no-await-in-loop': 'off',
diff --git a/packages/ui-default/pages/problem_edit.page.js b/packages/ui-default/pages/problem_edit.page.js
index 2e54b2094..cbf3a3b9d 100644
--- a/packages/ui-default/pages/problem_edit.page.js
+++ b/packages/ui-default/pages/problem_edit.page.js
@@ -22,7 +22,7 @@ function setDomSelected($dom, selected) {
 }
 
 async function updateSelection() {
-  dirtyCategories.forEach(({ type, category, subcategory }) => {
+  for (const { type, category, subcategory } of dirtyCategories) {
     let item = categories[category];
     const isSelected = item.select || _.some(item.children, (c) => c.select);
     setDomSelected(item.$tag, isSelected);
@@ -35,7 +35,7 @@ async function updateSelection() {
       if (item.select) selections.push(selectionName);
       else _.pull(selections, selectionName);
     }
-  });
+  }
   const requestCategoryTags = _.uniq(selections
     .filter((s) => s.indexOf(',') !== -1)
     .map((s) => s.split(',')[0]));
@@ -59,7 +59,7 @@ function findCategory(name) {
 function parseCategorySelection() {
   const $txt = $('[name="tag"]');
   tags.length = 0;
-  $txt.val().split(',').map((name) => name.trim()).forEach((name) => {
+  for (const name of $txt.val().split(',').map((i) => i.trim())) {
     if (!name) return;
     const [category, subcategory] = findCategory(name);
     if (!category) tags.push(name);
@@ -70,7 +70,7 @@ function parseCategorySelection() {
       categories[category].children[subcategory].select = true;
       dirtyCategories.push({ type: 'subcategory', subcategory, category });
     }
-  });
+  }
   updateSelection();
 }
 
@@ -78,7 +78,7 @@ function buildCategoryFilter() {
   const $container = $('[data-widget-cf-container]');
   if (!$container) return;
   $container.attr('class', 'widget--category-filter row small-up-3 medium-up-2');
-  $container.children('li').get().forEach((category) => {
+  for (const category of $container.children('li').get()) {
     const $category = $(category)
       .attr('class', 'widget--category-filter__category column');
     const $categoryTag = $category
@@ -104,16 +104,16 @@ function buildCategoryFilter() {
         .find('a')
         .attr('class', 'widget--category-filter__tag')
         .attr('data-category', categoryText);
-      $subCategoryTags.get().forEach((subCategoryTag) => {
+      for (const subCategoryTag of $subCategoryTags.get()) {
         const $tag = $(subCategoryTag);
         treeItem.children[$tag.text()] = { select: false, $tag };
-      });
+      }
       Dropdown.getOrConstruct($categoryTag, {
         target: $drop[0],
         position: 'left center',
       });
     }
-  });
+  }
   $(document).on('click', '.widget--category-filter__tag', (ev) => {
     if (ev.shiftKey || ev.metaKey || ev.ctrlKey) return;
     const tag = $(ev.currentTarget).text();
diff --git a/packages/ui-default/pages/problem_main.page.ts b/packages/ui-default/pages/problem_main.page.ts
index d43ddb42a..249cd5b37 100644
--- a/packages/ui-default/pages/problem_main.page.ts
+++ b/packages/ui-default/pages/problem_main.page.ts
@@ -108,7 +108,7 @@ function buildLegacyCategoryFilter() {
   const $container = $('[data-widget-cf-container]');
   if (!$container) return;
   $container.attr('class', 'widget--category-filter row small-up-3 medium-up-2');
-  $container.children('li').get().forEach((category) => {
+  for (const category of $container.children('li').get()) {
     const $category = $(category)
       .attr('class', 'widget--category-filter__category column');
     const $categoryTag = $category
@@ -139,18 +139,18 @@ function buildLegacyCategoryFilter() {
         .find('a')
         .attr('class', 'widget--category-filter__tag')
         .attr('data-category', categoryText);
-      $subCategoryTags.get().forEach((subCategoryTag) => {
+      for (const subCategoryTag of $subCategoryTags.get()) {
         const $tag = $(subCategoryTag);
         selections.category[categoryText].children[$tag.text()] = {
           $tag,
         };
-      });
+      }
       Dropdown.getOrConstruct($categoryTag, {
         target: $drop[0],
         position: 'left center',
       });
     }
-  });
+  }
   list.push(...Object.keys(selections.category));
   list.push(..._.flatMap(Object.values(selections.category), (c: any) => Object.keys(c.children)));
   $(document).on('click', '.widget--category-filter__tag', (ev) => handleTagSelected(ev));
@@ -228,9 +228,9 @@ async function handleOperation(operation) {
 }
 
 function hideTags(target) {
-  $(target).find('.problem__tag').get()
-    .filter((i) => list.includes(i.children[0].innerHTML))
-    .forEach((i) => $(i).addClass('notag--hide'));
+  for (const i of $(target).find('.problem__tag').get()) {
+    if (list.includes(i.children[0].innerHTML)) $(i).addClass('notag--hide');
+  }
 }
 
 const categoryDialog: any = new Dialog({
@@ -265,7 +265,7 @@ function buildSearchContainer() {
   });
 
   categoryDialog.$dom.find('.subcategory__all .search-tag__item').each((_index, _element) => {
-    const [,subcategory] = $(_element).attr('data-selection').split(':');
+    const [, subcategory] = $(_element).attr('data-selection').split(':');
     selections.category[subcategory] = {
       $tag: $(_element),
       children: {},
@@ -314,9 +314,9 @@ const page = new NamedPage(['problem_main'], () => {
   $(document).on('click', '[name="enter-edit-mode"]', () => {
     $body.removeClass('display-mode').addClass('edit-mode');
   });
-  ['delete', 'hide', 'unhide', 'copy'].forEach((op) => {
+  for (const op of ['delete', 'hide', 'unhide', 'copy']) {
     $(document).on('click', `[name="${op}_selected_problems"]`, () => handleOperation(op));
-  });
+  }
   $(document).on('click', '[name="download_selected_problems"]', handleDownload);
 
   $(document).on('click', '.toggle-tag', () => {
diff --git a/packages/ui-default/utils/pjax.js b/packages/ui-default/utils/pjax.js
index 7a0f8f13b..d1bdaf0ab 100644
--- a/packages/ui-default/utils/pjax.js
+++ b/packages/ui-default/utils/pjax.js
@@ -90,7 +90,7 @@ pjax.request = async (opt) => {
       window.history.replaceState(currentState, null, meta.url);
     }
     if (meta.title) document.title = meta.title;
-    data.fragments.forEach((fragment) => {
+    for (const fragment of data.fragments) {
       if (process.env.NODE_ENV !== 'production') {
         if (fragment.html === undefined) {
           throw new Error("Fragement should contain 'html'");
@@ -117,7 +117,7 @@ pjax.request = async (opt) => {
       $target.trigger('vjContentRemove');
       $target.replaceWith($el);
       $el.trigger('vjContentNew');
-    });
+    }
   } catch (err) {
     if (!err.aborted) {
       Notification.error(err.message);