diff --git a/news/4917.bugfix b/news/4917.bugfix
new file mode 100644
index 0000000000..938e6722b5
--- /dev/null
+++ b/news/4917.bugfix
@@ -0,0 +1 @@
+Remove anonymous function calls. Remove default exports from. @sneridagh
diff --git a/packages/volto-slate/src/actions/index.js b/packages/volto-slate/src/actions/index.js
index b73121ac23..7cbe33490e 100644
--- a/packages/volto-slate/src/actions/index.js
+++ b/packages/volto-slate/src/actions/index.js
@@ -1,3 +1,3 @@
-export saveSlateBlockSelection from './selection';
+export { default as saveSlateBlockSelection } from './selection';
 export * from './content';
 export * from './plugins';
diff --git a/packages/volto-slate/src/blocks/Text/index.js b/packages/volto-slate/src/blocks/Text/index.js
index 8082b45296..c6ee9893de 100644
--- a/packages/volto-slate/src/blocks/Text/index.js
+++ b/packages/volto-slate/src/blocks/Text/index.js
@@ -35,7 +35,7 @@ import textSVG from '@plone/volto/icons/subtext.svg';
 
 export { TextBlockView, TextBlockEdit, TextBlockSchema };
 
-export default (config) => {
+export default function applyConfig(config) {
   config.settings.slate = {
     // TODO: should we inverse order? First here gets executed last
     textblockExtensions: [
@@ -165,4 +165,4 @@ export default (config) => {
     restricted: true,
   };
   return config;
-};
+}
diff --git a/packages/volto-slate/src/editor/index.js b/packages/volto-slate/src/editor/index.js
index c092f1927d..0200279e01 100644
--- a/packages/volto-slate/src/editor/index.js
+++ b/packages/volto-slate/src/editor/index.js
@@ -1,9 +1,9 @@
 import * as slateConfig from './config';
 import installDefaultPlugins from './plugins';
-export SlateEditor from './SlateEditor';
-export EditorReference from './EditorReference';
+export { default as SlateEditor } from './SlateEditor';
+export { default as EditorReference } from './EditorReference';
 
-export default (config) => {
+export default function applyConfig(config) {
   config.settings.slate = {
     ...slateConfig,
     // showExpandedToolbar: false,
@@ -11,4 +11,4 @@ export default (config) => {
   };
   config = installDefaultPlugins(config);
   return config;
-};
+}
diff --git a/packages/volto-slate/src/editor/ui/SlateContextToolbar.jsx b/packages/volto-slate/src/editor/ui/SlateContextToolbar.jsx
index d140070779..6f8e494bfb 100644
--- a/packages/volto-slate/src/editor/ui/SlateContextToolbar.jsx
+++ b/packages/volto-slate/src/editor/ui/SlateContextToolbar.jsx
@@ -3,11 +3,11 @@ import Toolbar from './Toolbar';
 
 // A toolbar that conditionally renders itself based on the presense of
 // children
-export default ({ editor, plugins, show }) => {
+export default function SlateContextToolbar({ editor, plugins, show }) {
   if (!show) {
     return null;
   }
 
   const components = plugins.map((plug) => plug(editor)).filter((c) => !!c);
   return components.length ? <Toolbar>{components}</Toolbar> : '';
-};
+}
diff --git a/packages/volto-slate/src/editor/ui/index.js b/packages/volto-slate/src/editor/ui/index.js
index 089e0012c3..422bc6ac2c 100644
--- a/packages/volto-slate/src/editor/ui/index.js
+++ b/packages/volto-slate/src/editor/ui/index.js
@@ -1,15 +1,15 @@
-export BasicToolbar from './BasicToolbar';
-export BlockButton from './BlockButton';
-export ClearFormattingButton from './ClearFormattingButton';
-export ExpandedToolbar from './ExpandedToolbar';
-export Expando from './Expando';
-export MarkButton from './MarkButton';
-export Menu from './Menu';
-export Separator from './Separator';
-export SlateContextToolbar from './SlateContextToolbar';
-export SlateToolbar from './SlateToolbar';
-export Toolbar from './Toolbar';
-export ToolbarButton from './ToolbarButton';
-export MarkElementButton from './MarkElementButton';
-export PositionedToolbar from './PositionedToolbar';
-export InlineToolbar from './InlineToolbar';
+export { default as BasicToolbar } from './BasicToolbar';
+export { default as BlockButton } from './BlockButton';
+export { default as ClearFormattingButton } from './ClearFormattingButton';
+export { default as ExpandedToolbar } from './ExpandedToolbar';
+export { default as Expando } from './Expando';
+export { default as MarkButton } from './MarkButton';
+export { default as Menu } from './Menu';
+export { default as Separator } from './Separator';
+export { default as SlateContextToolbar } from './SlateContextToolbar';
+export { default as SlateToolbar } from './SlateToolbar';
+export { default as Toolbar } from './Toolbar';
+export { default as ToolbarButton } from './ToolbarButton';
+export { default as MarkElementButton } from './MarkElementButton';
+export { default as PositionedToolbar } from './PositionedToolbar';
+export { default as InlineToolbar } from './InlineToolbar';
diff --git a/packages/volto-slate/src/index.js b/packages/volto-slate/src/index.js
index ffcb29c775..a9ba83c2f5 100644
--- a/packages/volto-slate/src/index.js
+++ b/packages/volto-slate/src/index.js
@@ -8,7 +8,7 @@ import RichTextWidgetView from './widgets/RichTextWidgetView';
 import HtmlSlateWidget from './widgets/HtmlSlateWidget';
 import ObjectByTypeWidget from './widgets/ObjectByTypeWidget';
 
-export default (config) => {
+export default function applyConfig(config) {
   config = [installSlate, installTextBlock, installTableBlock].reduce(
     (acc, apply) => apply(acc),
     config,
@@ -58,4 +58,4 @@ export default (config) => {
   }
 
   return config;
-};
+}
diff --git a/src/components/manage/AnchorPlugin/index.jsx b/src/components/manage/AnchorPlugin/index.jsx
index 1043887bf1..66f9726fe3 100644
--- a/src/components/manage/AnchorPlugin/index.jsx
+++ b/src/components/manage/AnchorPlugin/index.jsx
@@ -44,7 +44,7 @@ function unboundRemoveEntity(editorState) {
   return newEditorState;
 }
 
-export default (config = {}) => {
+export default function AnchorPlugin(config = {}) {
   // ToDo: Get rif of the remainings of having the original CSS modules
   const defaultTheme = {};
 
@@ -79,4 +79,4 @@ export default (config = {}) => {
         setEditorState(removeEntity(getEditorState())),
     }),
   };
-};
+}
diff --git a/src/components/manage/AnchorPlugin/utils/EditorUtils.js b/src/components/manage/AnchorPlugin/utils/EditorUtils.js
index 1623ca82f7..81117fb0ea 100644
--- a/src/components/manage/AnchorPlugin/utils/EditorUtils.js
+++ b/src/components/manage/AnchorPlugin/utils/EditorUtils.js
@@ -1,4 +1,4 @@
-export default ({ draftJs }) => ({
+const EditorUtils = ({ draftJs }) => ({
   createLinkAtSelection(editorState, url) {
     const contentState = editorState
       .getCurrentContent()
@@ -43,3 +43,5 @@ export default ({ draftJs }) => ({
     return entity && entity.getType() === entityType;
   },
 });
+
+export default EditorUtils;
diff --git a/src/components/manage/Blocks/Block/Style.jsx b/src/components/manage/Blocks/Block/Style.jsx
index 4ea8f09ef7..42d5393e0d 100644
--- a/src/components/manage/Blocks/Block/Style.jsx
+++ b/src/components/manage/Blocks/Block/Style.jsx
@@ -1,7 +1,7 @@
 import React from 'react';
 import cx from 'classnames';
 
-export default ({ data, detached, children }) => {
+export default function Style({ data, detached, children }) {
   return (
     <div
       className={cx(
@@ -25,4 +25,4 @@ export default ({ data, detached, children }) => {
       </div>
     </div>
   );
-};
+}
diff --git a/src/components/manage/Blocks/Listing/getAsyncData.js b/src/components/manage/Blocks/Listing/getAsyncData.js
index 7d4ffe3662..c0947c7e75 100644
--- a/src/components/manage/Blocks/Listing/getAsyncData.js
+++ b/src/components/manage/Blocks/Listing/getAsyncData.js
@@ -1,7 +1,12 @@
 import { getQueryStringResults } from '@plone/volto/actions';
 import { resolveBlockExtensions } from '@plone/volto/helpers';
 
-export default ({ dispatch, data, path, blocksConfig }) => {
+export default function getListingBlockAsyncData({
+  dispatch,
+  data,
+  path,
+  blocksConfig,
+}) {
   const { resolvedExtensions } = resolveBlockExtensions(data, blocksConfig);
 
   return [
@@ -18,4 +23,4 @@ export default ({ dispatch, data, path, blocksConfig }) => {
       ),
     ),
   ];
-};
+}
diff --git a/src/components/manage/Blocks/Search/components/index.js b/src/components/manage/Blocks/Search/components/index.js
index a6cad24b8c..d8b8d5c2d1 100644
--- a/src/components/manage/Blocks/Search/components/index.js
+++ b/src/components/manage/Blocks/Search/components/index.js
@@ -1,13 +1,13 @@
-export SearchDetails from './SearchDetails';
-export Facets from './Facets';
-export SelectFacet from './SelectFacet';
-export CheckboxFacet from './CheckboxFacet';
-export DateRangeFacet from './DateRangeFacet';
-export SearchInput from './SearchInput';
-export FilterList from './FilterList';
-export SortOn from './SortOn';
-export ToggleFacet from './ToggleFacet';
-export SelectFacetFilterListEntry from './SelectFacetFilterListEntry';
-export ToggleFacetFilterListEntry from './ToggleFacetFilterListEntry';
-export DateRangeFacetFilterListEntry from './DateRangeFacetFilterListEntry';
-export ViewSwitcher from './ViewSwitcher';
+export { default as SearchDetails } from './SearchDetails';
+export { default as Facets } from './Facets';
+export { default as SelectFacet } from './SelectFacet';
+export { default as CheckboxFacet } from './CheckboxFacet';
+export { default as DateRangeFacet } from './DateRangeFacet';
+export { default as SearchInput } from './SearchInput';
+export { default as FilterList } from './FilterList';
+export { default as SortOn } from './SortOn';
+export { default as ToggleFacet } from './ToggleFacet';
+export { default as SelectFacetFilterListEntry } from './SelectFacetFilterListEntry';
+export { default as ToggleFacetFilterListEntry } from './ToggleFacetFilterListEntry';
+export { default as DateRangeFacetFilterListEntry } from './DateRangeFacetFilterListEntry';
+export { default as ViewSwitcher } from './ViewSwitcher';
diff --git a/src/components/manage/Blocks/Search/hocs/index.js b/src/components/manage/Blocks/Search/hocs/index.js
index 370c7a9299..6bbb624810 100644
--- a/src/components/manage/Blocks/Search/hocs/index.js
+++ b/src/components/manage/Blocks/Search/hocs/index.js
@@ -1,2 +1,2 @@
-export withQueryString from './withQueryString';
-export withSearch from './withSearch';
+export { default as withQueryString } from './withQueryString';
+export { default as withSearch } from './withSearch';
diff --git a/src/components/manage/Blocks/Search/hocs/withQueryString.jsx b/src/components/manage/Blocks/Search/hocs/withQueryString.jsx
index d676858748..98c4b12faa 100644
--- a/src/components/manage/Blocks/Search/hocs/withQueryString.jsx
+++ b/src/components/manage/Blocks/Search/hocs/withQueryString.jsx
@@ -10,7 +10,7 @@ function getDisplayName(WrappedComponent) {
  * A HOC that injects querystring metadata information from the backend.
  *
  */
-export default (WrappedComponent) => {
+export default function withQueryString(WrappedComponent) {
   function WithQueryString(props) {
     const dispatch = useDispatch();
 
@@ -29,4 +29,4 @@ export default (WrappedComponent) => {
     WrappedComponent,
   )})`;
   return WithQueryString;
-};
+}
diff --git a/src/components/manage/Blocks/ToC/variations/index.js b/src/components/manage/Blocks/ToC/variations/index.js
index e77eb48319..ca49592d44 100644
--- a/src/components/manage/Blocks/ToC/variations/index.js
+++ b/src/components/manage/Blocks/ToC/variations/index.js
@@ -1,7 +1,7 @@
 import DefaultTocRenderer from './DefaultTocRenderer';
 import HorizontalMenu from './HorizontalMenu';
 
-export default [
+const ToCVariations = [
   {
     id: 'default',
     title: 'Listing (default)',
@@ -14,3 +14,5 @@ export default [
     view: HorizontalMenu,
   },
 ];
+
+export default ToCVariations;
diff --git a/src/config/RichTextEditor/Blocks.jsx b/src/config/RichTextEditor/Blocks.jsx
index 22c7e76588..fd4c5eca96 100644
--- a/src/config/RichTextEditor/Blocks.jsx
+++ b/src/config/RichTextEditor/Blocks.jsx
@@ -1,4 +1,4 @@
-export default (props) => {
+export default function Blocks(props) {
   const { draftJs, immutableLib } = props;
   const { DefaultDraftBlockRenderMap } = draftJs;
   const { Map } = immutableLib;
@@ -27,4 +27,4 @@ export default (props) => {
   const listBlockTypes = ['unordered-list-item', 'ordered-list-item'];
 
   return { extendedBlockRenderMap, blockStyleFn, listBlockTypes };
-};
+}
diff --git a/src/config/RichTextEditor/FromHTML.jsx b/src/config/RichTextEditor/FromHTML.jsx
index fcac2c82c9..194ba9d79b 100644
--- a/src/config/RichTextEditor/FromHTML.jsx
+++ b/src/config/RichTextEditor/FromHTML.jsx
@@ -1,8 +1,8 @@
-export default (element) => {
+export default function FromHTMLCustomBlockFn(element) {
   if (element.className === 'callout') {
     return {
       type: 'callout',
     };
   }
   return null;
-};
+}
diff --git a/src/config/RichTextEditor/Styles.jsx b/src/config/RichTextEditor/Styles.jsx
index 537276769f..8f905817c3 100644
--- a/src/config/RichTextEditor/Styles.jsx
+++ b/src/config/RichTextEditor/Styles.jsx
@@ -13,7 +13,7 @@ import orderedListSVG from '@plone/volto/icons/list-numbered.svg';
 import blockquoteSVG from '@plone/volto/icons/quote.svg';
 import calloutSVG from '@plone/volto/icons/megaphone.svg';
 
-export default function (props) {
+export default function Styles(props) {
   const createInlineStyleButton = props.draftJsCreateInlineStyleButton.default;
   const createBlockStyleButton = props.draftJsCreateBlockStyleButton.default;
 
diff --git a/src/constants/Indexes.js b/src/constants/Indexes.js
index 4dd90bb47b..d4dd0731b6 100644
--- a/src/constants/Indexes.js
+++ b/src/constants/Indexes.js
@@ -3,7 +3,7 @@
  * @module constants/indexes
  */
 
-export default {
+const Indexes = {
   sortable_title: { label: 'Title', type: 'string', sort_on: 'sortable_title' },
   review_state: { label: 'Review state', type: 'string' },
   ModificationDate: {
@@ -35,6 +35,8 @@ export default {
   Type: { label: 'Type', type: 'string' },
 };
 
+export default Indexes;
+
 export const defaultIndexes = [
   'review_state',
   'ModificationDate',
diff --git a/src/express-middleware/devproxy.js b/src/express-middleware/devproxy.js
index d3411fdf89..1f0a6273aa 100644
--- a/src/express-middleware/devproxy.js
+++ b/src/express-middleware/devproxy.js
@@ -37,7 +37,7 @@ function getEnv() {
   return _env;
 }
 
-export default function () {
+export default function devProxyMiddleware() {
   const middleware = express.Router();
   const devProxy = createProxyMiddleware(filter, {
     selfHandleResponse: true,
diff --git a/src/express-middleware/files.js b/src/express-middleware/files.js
index 2579c112ad..80ab96e21b 100644
--- a/src/express-middleware/files.js
+++ b/src/express-middleware/files.js
@@ -9,7 +9,7 @@ const HEADERS = [
   'Content-Type',
 ];
 
-function fileMiddleware(req, res, next) {
+function filesMiddlewareFn(req, res, next) {
   getAPIResourceWithAuth(req)
     .then((resource) => {
       // Just forward the headers that we need
@@ -24,10 +24,10 @@ function fileMiddleware(req, res, next) {
     .catch(next);
 }
 
-export default function () {
+export default function filesMiddleware() {
   const middleware = express.Router();
 
-  middleware.all(['**/@@download/*', '**/@@display-file/*'], fileMiddleware);
+  middleware.all(['**/@@download/*', '**/@@display-file/*'], filesMiddlewareFn);
   middleware.id = 'filesResourcesProcessor';
   return middleware;
 }
diff --git a/src/express-middleware/images.js b/src/express-middleware/images.js
index 2a86c203d1..11bbacf273 100644
--- a/src/express-middleware/images.js
+++ b/src/express-middleware/images.js
@@ -3,7 +3,7 @@ import { getAPIResourceWithAuth } from '@plone/volto/helpers';
 
 const HEADERS = ['content-type', 'content-disposition', 'cache-control'];
 
-function imageMiddleware(req, res, next) {
+function imageMiddlewareFn(req, res, next) {
   getAPIResourceWithAuth(req)
     .then((resource) => {
       // Just forward the headers that we need
@@ -17,11 +17,11 @@ function imageMiddleware(req, res, next) {
     .catch(next);
 }
 
-export default function () {
+export default function imagesMiddleware() {
   const middleware = express.Router();
 
-  middleware.all(['**/@@images/*'], imageMiddleware);
-  middleware.all(['/@portrait/*'], imageMiddleware);
+  middleware.all(['**/@@images/*'], imageMiddlewareFn);
+  middleware.all(['/@portrait/*'], imageMiddlewareFn);
   middleware.id = 'imageResourcesProcessor';
   return middleware;
 }
diff --git a/src/express-middleware/robotstxt.js b/src/express-middleware/robotstxt.js
index 3f8e49deab..4a68ed7001 100644
--- a/src/express-middleware/robotstxt.js
+++ b/src/express-middleware/robotstxt.js
@@ -22,7 +22,7 @@ const envRobots = function (req, res, next) {
   res.send(process.env.VOLTO_ROBOTSTXT);
 };
 
-export default function () {
+export default function robotstxtMiddleware() {
   const middleware = express.Router();
   if (process.env.VOLTO_ROBOTSTXT) {
     middleware.all('**/robots.txt', envRobots);
diff --git a/src/express-middleware/sitemap.js b/src/express-middleware/sitemap.js
index 8b05884bb3..59bf641c8f 100644
--- a/src/express-middleware/sitemap.js
+++ b/src/express-middleware/sitemap.js
@@ -47,7 +47,7 @@ export const sitemapIndex = function (req, res, next) {
   });
 };
 
-export default function () {
+export default function sitemapMiddleware() {
   const middleware = express.Router();
 
   middleware.all('**/sitemap.xml.gz', sitemap);
diff --git a/src/express-middleware/static.js b/src/express-middleware/static.js
index 5e90754bc0..d7392ce668 100644
--- a/src/express-middleware/static.js
+++ b/src/express-middleware/static.js
@@ -2,7 +2,7 @@ import express from 'express';
 import path from 'path';
 import config from '@plone/volto/registry';
 
-const staticMiddleware = express.static(
+const staticMiddlewareFn = express.static(
   process.env.BUILD_DIR
     ? path.join(process.env.BUILD_DIR, 'public')
     : process.env.RAZZLE_PUBLIC_DIR,
@@ -24,9 +24,9 @@ const staticMiddleware = express.static(
   },
 );
 
-export default function () {
+export default function staticsMiddleware() {
   const middleware = express.Router();
-  middleware.all('*', staticMiddleware);
+  middleware.all('*', staticMiddlewareFn);
   middleware.id = 'staticResourcesProcessor';
   return middleware;
 }
diff --git a/src/helpers/Extensions/index.js b/src/helpers/Extensions/index.js
index 1fabfa7452..cc4c042dfb 100644
--- a/src/helpers/Extensions/index.js
+++ b/src/helpers/Extensions/index.js
@@ -1,5 +1,6 @@
 export * from './withBlockSchemaEnhancer';
-export withBlockExtensions, {
+export {
+  default as withBlockExtensions,
   resolveExtension,
   resolveBlockExtensions,
 } from './withBlockExtensions';
diff --git a/src/helpers/index.js b/src/helpers/index.js
index 212eb17f18..ef59a10445 100644
--- a/src/helpers/index.js
+++ b/src/helpers/index.js
@@ -5,9 +5,9 @@
  */
 
 // export { injectLazyLibs } from './Loadable/Loadable';
-export Api from '@plone/volto/helpers/Api/Api';
+export { default as Api } from '@plone/volto/helpers/Api/Api';
 export { getAPIResourceWithAuth } from '@plone/volto/helpers/Api/APIResourceWithAuth';
-export Html from '@plone/volto/helpers/Html/Html';
+export { default as Html } from '@plone/volto/helpers/Html/Html';
 export {
   getAuthToken,
   persistAuthToken,
@@ -59,8 +59,8 @@ export {
   buildStyleClassNamesExtenders,
   getPreviousNextBlock,
 } from '@plone/volto/helpers/Blocks/Blocks';
-export BodyClass from '@plone/volto/helpers/BodyClass/BodyClass';
-export ScrollToTop from '@plone/volto/helpers/ScrollToTop/ScrollToTop';
+export { default as BodyClass } from '@plone/volto/helpers/BodyClass/BodyClass';
+export { default as ScrollToTop } from '@plone/volto/helpers/ScrollToTop/ScrollToTop';
 export {
   getBoolean,
   getVocabName,
@@ -70,11 +70,10 @@ export {
   getFieldsVocabulary,
 } from '@plone/volto/helpers/Vocabularies/Vocabularies';
 
-export langmap from './LanguageMap/LanguageMap';
-export Helmet from './Helmet/Helmet';
-export FormValidation, {
-  validateFileUploadSize,
-} from './FormValidation/FormValidation';
+export { default as langmap } from './LanguageMap/LanguageMap';
+export { default as Helmet } from './Helmet/Helmet';
+export { default as FormValidation } from './FormValidation/FormValidation';
+export { validateFileUploadSize } from './FormValidation/FormValidation';
 export {
   difference,
   getColor,
@@ -111,7 +110,7 @@ export { useDetectClickOutside } from './Utils/useDetectClickOutside';
 export { useEvent } from './Utils/useEvent';
 export { usePrevious } from './Utils/usePrevious';
 export { usePagination } from './Utils/usePagination';
-export useUndoManager from './UndoManager/useUndoManager';
+export { default as useUndoManager } from './UndoManager/useUndoManager';
 export { getCookieOptions } from './Cookies/cookies';
 export { getWidgetView } from './Widget/widget';
 export {
diff --git a/src/middleware/index.js b/src/middleware/index.js
index 5eed62a627..f8f6fae956 100644
--- a/src/middleware/index.js
+++ b/src/middleware/index.js
@@ -4,8 +4,8 @@
  * @example import { api } from 'middleware';
  */
 
-export api from '@plone/volto/middleware/api';
-export blacklistRoutes from './blacklistRoutes';
+export { default as api } from '@plone/volto/middleware/api';
+export { default as blacklistRoutes } from './blacklistRoutes';
 export {
   protectLoadStart,
   protectLoadEnd,
diff --git a/src/start-server.js b/src/start-server.js
index ee34673e29..5e8fcc1449 100644
--- a/src/start-server.js
+++ b/src/start-server.js
@@ -4,7 +4,7 @@ import http from 'http';
 import app from './server';
 import debug from 'debug';
 
-export default () => {
+export default function server() {
   const server = http.createServer(app);
   // const host = process.env.HOST || 'localhost';
   const port = process.env.PORT || 3000;
@@ -46,4 +46,4 @@ export default () => {
       currentApp = newApp;
     });
   };
-};
+}