Feature/fix tabulator stops (#1831)

Add tab stops to action to increase accessibility of SCM-Manager with keyboard only usage. Also add a focus trap for modals to ensure the actions inside the modal can be used without losing the focus.

Co-authored-by: René Pfeuffer <rene.pfeuffer@cloudogu.com>

gradle/changelog/keyboard-access.yaml

@@ -0,0 +1,4 @@
+- type: changed
+  description: Improve keyboard access by adding tab stops ([#1831](https://github.com/scm-manager/scm-manager/pull/1831))
+- type: changed
+  description: Improve aria lables for better screen reader support ([#1831](https://github.com/scm-manager/scm-manager/pull/1831))

scm-ui/ui-components/package.json

@@ -60,6 +60,7 @@
     "react-test-renderer": "^17.0.1",
     "sass-loader": "^12.3.0",
     "storybook-addon-i18next": "^1.3.0",
+    "tabbable": "^5.2.1",
     "storybook-addon-themes": "^6.1.0",
     "to-camel-case": "^1.0.0",
     "webpack": "^5.61.0",

scm-ui/ui-components/src/Autocomplete.tsx

@@ -81,6 +81,7 @@ class Autocomplete extends React.Component<Props, State> {
       creatable,
       className,
     } = this.props;
+
     return (
       <div className={classNames("field", className)}>
         <LabelWithHelpIcon label={label} helpText={helpText} />
@@ -104,6 +105,7 @@ class Autocomplete extends React.Component<Props, State> {
                   },
                 });
               }}
+              aria-label={helpText || label}
             />
           ) : (
             <Async
@@ -114,6 +116,7 @@ class Autocomplete extends React.Component<Props, State> {
               placeholder={placeholder}
               loadingMessage={() => loadingMessage}
               noOptionsMessage={() => noOptionsMessage}
+              aria-label={helpText || label}
             />
           )}
         </div>

scm-ui/ui-components/src/BranchSelector.tsx

@@ -26,6 +26,7 @@ import classNames from "classnames";
 import styled from "styled-components";
 import { Branch } from "@scm-manager/ui-types";
 import { Select } from "./forms";
+import { createA11yId } from "./createA11yId";
 
 type Props = {
   branches: Branch[];
@@ -45,11 +46,15 @@ const MinWidthControl = styled.div`
 `;
 
 const BranchSelector: FC<Props> = ({ branches, onSelectBranch, selectedBranch, label, disabled }) => {
+  const a11yId = createA11yId("branch-select");
+
   if (branches) {
     return (
       <div className={classNames("field", "is-horizontal")}>
         <ZeroflexFieldLabel className={classNames("field-label", "is-normal")}>
-          <label className={classNames("label", "is-size-6")}>{label}</label>
+          <label className={classNames("label", "is-size-6")} id={a11yId}>
+            {label}
+          </label>
         </ZeroflexFieldLabel>
         <div className="field-body">
           <div className={classNames("field", "is-narrow", "mb-0")}>
@@ -61,6 +66,7 @@ const BranchSelector: FC<Props> = ({ branches, onSelectBranch, selectedBranch, l
                 disabled={!!disabled}
                 value={selectedBranch}
                 addValueToOptions={true}
+                ariaLabelledby={a11yId}
               />
             </MinWidthControl>
           </div>

scm-ui/ui-components/src/Breadcrumb.tsx

@@ -23,11 +23,11 @@
  */
 import React, { FC, useState } from "react";
 import { useTranslation } from "react-i18next";
-import { useHistory, useLocation, Link } from "react-router-dom";
+import { Link, useHistory, useLocation } from "react-router-dom";
 import classNames from "classnames";
 import styled from "styled-components";
 import { urls } from "@scm-manager/ui-api";
-import { Branch, Repository, File } from "@scm-manager/ui-types";
+import { Branch, File, Repository } from "@scm-manager/ui-types";
 import { binder, ExtensionPoint, extensionPoints } from "@scm-manager/ui-extensions";
 import Icon from "./Icon";
 import Tooltip from "./Tooltip";
@@ -68,20 +68,25 @@ const BreadcrumbNav = styled.nav`
   width: 100%;
 
   /* move slash to end */
+
   li + li::before {
     content: none;
   }
+
   li:not(:last-child)::after {
     color: #b5b5b5; //$breadcrumb-item-separator-color
     content: "\\0002f";
   }
+
   li:first-child {
     margin-left: 0.75rem;
   }
 
   /* sizing of each item */
+
   li {
     max-width: 375px;
+
     a {
       display: initial;
     }
@@ -94,6 +99,7 @@ const HomeIcon = styled(Icon)`
 
 const ActionBar = styled.div`
   /* ensure space between action bar items */
+
   & > * {
     /* 
      * We have to use important, because plugins could use field or control classes like the editor-plugin does.
@@ -117,7 +123,7 @@ const Breadcrumb: FC<Props> = ({
   baseUrl,
   sources,
   permalink,
-  preButtons,
+  preButtons
 }) => {
   const location = useLocation();
   const history = useHistory();
@@ -189,13 +195,13 @@ const Breadcrumb: FC<Props> = ({
         {prefixButtons}
         <ul>
           <li>
-            <Link to={homeUrl}>
+            <Link to={homeUrl} aria-label={t("breadcrumb.home")}>
               <HomeIcon title={t("breadcrumb.home")} name="home" color="inherit" />
             </Link>
           </li>
           {pathSection()}
         </ul>
-        <PermaLinkWrapper className="ml-1">
+        <PermaLinkWrapper className="ml-1" tabIndex={0} onKeyDown={e => e.key === "Enter" && copySource()}>
           {copying ? (
             <Icon name="spinner fa-spin" alt={t("breadcrumb.loading")} />
           ) : (
@@ -214,7 +220,7 @@ const Breadcrumb: FC<Props> = ({
     branch: branch ? branch : defaultBranch,
     path,
     sources,
-    repository,
+    repository
   };
 
   const renderExtensionPoints = () => {

scm-ui/ui-components/src/CardColumn.tsx

@@ -75,6 +75,7 @@ const CardColumn: FC<Props> = ({
           e.preventDefault();
           action();
         }}
+        tabIndex={0}
       />
     );
   }

scm-ui/ui-components/src/Help.tsx

@@ -31,16 +31,18 @@ type Props = {
   message: string;
   multiline?: boolean;
   className?: string;
+  id?: string;
 };
 
 const AbsolutePositionTooltip = styled(Tooltip)`
   position: absolute;
 `;
 
-const Help: FC<Props> = ({ message, multiline, className }) => (
+const Help: FC<Props> = ({ message, multiline, className, id }) => (
   <AbsolutePositionTooltip
     className={classNames("is-inline-block", "pl-1", multiline ? "has-tooltip-multiline" : undefined, className)}
     message={message}
+    id={id}
   >
     <HelpIcon />
   </AbsolutePositionTooltip>

scm-ui/ui-components/src/Tooltip.tsx

@@ -29,6 +29,7 @@ type Props = {
   location: TooltipLocation;
   multiline?: boolean;
   children: ReactNode;
+  id?: string;
 };
 
 export type TooltipLocation = "bottom" | "right" | "top" | "left";
@@ -39,7 +40,7 @@ class Tooltip extends React.Component<Props> {
   };
 
   render() {
-    const { className, message, location, multiline, children } = this.props;
+    const { className, message, location, multiline, children, id } = this.props;
     let classes = `tooltip has-tooltip-${location}`;
     if (multiline) {
       classes += " has-tooltip-multiline";
@@ -49,7 +50,7 @@ class Tooltip extends React.Component<Props> {
     }
 
     return (
-      <span className={classes} data-tooltip={message}>
+      <span className={classes} data-tooltip={message} aria-label={message} id={id}>
         {children}
       </span>
     );

scm-ui/ui-components/src/buttons/Button.tsx

@@ -21,7 +21,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-import React, { FC, MouseEvent, ReactNode } from "react";
+import React, { FC, MouseEvent, ReactNode, KeyboardEvent } from "react";
 import classNames from "classnames";
 import { Link } from "react-router-dom";
 import Icon from "../Icon";
@@ -32,7 +32,7 @@ export type ButtonProps = {
   title?: string;
   loading?: boolean;
   disabled?: boolean;
-  action?: (event: MouseEvent) => void;
+  action?: (event: MouseEvent | KeyboardEvent) => void;
   link?: string;
   className?: string;
   icon?: string;

scm-ui/ui-components/src/buttons/RemoveEntryOfTableButton.tsx

@@ -21,7 +21,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-import React, { MouseEvent } from "react";
+import React, { MouseEvent, KeyboardEvent } from "react";
 import { DeleteButton } from ".";
 import classNames from "classnames";
 
@@ -41,7 +41,7 @@ class RemoveEntryOfTableButton extends React.Component<Props, State> {
       <div className={classNames("is-pulled-right")}>
         <DeleteButton
           label={label}
-          action={(event: MouseEvent) => {
+          action={(event: MouseEvent | KeyboardEvent) => {
             event.preventDefault();
             removeEntry(entryname);
           }}

scm-ui/ui-components/src/buttons/SubmitButton.tsx

@@ -21,7 +21,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-import React, { MouseEvent } from "react";
+import React, { MouseEvent, KeyboardEvent } from "react";
 import Button, { ButtonProps } from "./Button";
 
 type SubmitButtonProps = ButtonProps & {
@@ -41,7 +41,7 @@ class SubmitButton extends React.Component<SubmitButtonProps> {
         type="submit"
         color="primary"
         {...this.props}
-        action={(event: MouseEvent) => {
+        action={(event: MouseEvent | KeyboardEvent) => {
           if (action) {
             action(event);
           }

scm-ui/ui-components/src/createA11yId.tsx

@@ -0,0 +1,27 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+let counter = 0;
+
+export const createA11yId = (prefix: string) => prefix + "_" + counter++;

scm-ui/ui-components/src/forms/AddEntryToTableField.tsx

@@ -21,7 +21,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-import React, { FC, useState, MouseEvent } from "react";
+import React, { FC, useState, MouseEvent, KeyboardEvent } from "react";
 import styled from "styled-components";
 import Level from "../layout/Level";
 import AddButton from "../buttons/AddButton";
@@ -56,7 +56,7 @@ const AddEntryToTableField: FC<Props> = ({
     setEntryToAdd(entryName);
   };
 
-  const addButtonClicked = (event: MouseEvent) => {
+  const addButtonClicked = (event: MouseEvent | KeyboardEvent) => {
     event.preventDefault();
     appendEntry();
   };

scm-ui/ui-components/src/forms/AutocompleteAddEntryToTableField.tsx

@@ -21,7 +21,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-import React, { FC, useState, MouseEvent } from "react";
+import React, { FC, useState, MouseEvent, KeyboardEvent } from "react";
 import styled from "styled-components";
 import { SelectValue } from "@scm-manager/ui-types";
 import Level from "../layout/Level";
@@ -61,7 +61,7 @@ const AutocompleteAddEntryToTableField: FC<Props> = ({
     setSelectedValue(selection);
   };
 
-  const addButtonClicked = (event: MouseEvent) => {
+  const addButtonClicked = (event: MouseEvent | KeyboardEvent) => {
     event.preventDefault();
     appendEntry();
   };

scm-ui/ui-components/src/forms/Checkbox.tsx

@@ -27,6 +27,7 @@ import LabelWithHelpIcon from "./LabelWithHelpIcon";
 import useInnerRef from "./useInnerRef";
 import { createFormFieldWrapper, FieldProps, FieldType, isLegacy, isUsingRef } from "./FormFieldTypes";
 import classNames from "classnames";
+import { createA11yId } from "../createA11yId";
 
 export interface CheckboxElement extends HTMLElement {
   value: boolean;
@@ -83,17 +84,20 @@ const InnerCheckbox: FC<FieldProps<BaseProps, HTMLInputElement, boolean>> = ({
     }
   };
 
+  const id = createA11yId("checkbox");
+  const helpId = createA11yId("checkbox");
+
   const renderHelp = () => {
     const { title, helpText } = props;
     if (helpText && !title) {
-      return <Help message={helpText} />;
+      return <Help message={helpText} id={helpId} />;
     }
   };
 
   const renderLabelWithHelp = () => {
     const { title, helpText } = props;
     if (title) {
-      return <LabelWithHelpIcon label={title} helpText={helpText} />;
+      return <LabelWithHelpIcon label={title} helpText={helpText} id={id} helpId={helpId} />;
     }
   };
   return (
@@ -116,6 +120,8 @@ const InnerCheckbox: FC<FieldProps<BaseProps, HTMLInputElement, boolean>> = ({
             checked={props.checked}
             disabled={disabled}
             readOnly={readOnly}
+            aria-labelledby={id}
+            aria-describedby={helpId}
             {...createAttributesForTesting(testId)}
           />{" "}
           {label}

scm-ui/ui-components/src/forms/FileInput.tsx

@@ -26,6 +26,7 @@ import { useTranslation } from "react-i18next";
 import classNames from "classnames";
 import { createAttributesForTesting } from "../devBuild";
 import LabelWithHelpIcon from "./LabelWithHelpIcon";
+import { createA11yId } from "../createA11yId";
 
 type Props = {
   name?: string;
@@ -73,9 +74,11 @@ const FileInput: FC<Props> = ({
     }
   };
 
+  const id = createA11yId("file-input");
+
   return (
     <div className={classNames("field", className)}>
-      <LabelWithHelpIcon label={label} helpText={helpText} />
+      <LabelWithHelpIcon label={label} helpText={helpText} id={id} />
       <div className="file is-info has-name is-fullwidth">
         <label className="file-label">
           <input
@@ -87,6 +90,7 @@ const FileInput: FC<Props> = ({
             disabled={disabled}
             onChange={handleChange}
             onBlur={handleBlur}
+            aria-describedby={id}
             {...createAttributesForTesting(testId)}
           />
           <span className="file-cta">

scm-ui/ui-components/src/forms/FilterInput.tsx

@@ -34,13 +34,14 @@ type Props = {
   placeholder?: string;
   autoFocus?: boolean;
   className?: string;
+  id?: string;
 };
 
 const FixedHeightInput = styled.input`
   height: 2.5rem;
 `;
 
-const FilterInput: FC<Props> = ({ filter, value, testId, placeholder, autoFocus, className }) => {
+const FilterInput: FC<Props> = ({ filter, value, testId, placeholder, autoFocus, className, id }) => {
   const [stateValue, setStateValue] = useState(value || "");
   const [timeoutId, setTimeoutId] = useState<ReturnType<typeof setTimeout>>();
   const [t] = useTranslation("commons");
@@ -79,6 +80,7 @@ const FilterInput: FC<Props> = ({ filter, value, testId, placeholder, autoFocus,
           value={stateValue}
           onChange={(event) => setStateValue(event.target.value)}
           autoFocus={autoFocus || false}
+          aria-describedby={id}
         />
         <span className="icon is-small is-left">
           <i className="fas fa-filter" />

scm-ui/ui-components/src/forms/InputField.tsx

@@ -27,6 +27,7 @@ import LabelWithHelpIcon from "./LabelWithHelpIcon";
 import { createAttributesForTesting } from "../devBuild";
 import useAutofocus from "./useAutofocus";
 import { createFormFieldWrapper, FieldProps, FieldType, isLegacy, isUsingRef } from "./FormFieldTypes";
+import { createA11yId } from "../createA11yId";
 
 type BaseProps = {
   label?: string;
@@ -102,11 +103,16 @@ export const InnerInputField: FC<FieldProps<BaseProps, HTMLInputElement, string>
   } else if (informationMessage) {
     helper = <p className="help is-info">{informationMessage}</p>;
   }
+
+  const id = createA11yId("input");
+  const helpId = createA11yId("input");
   return (
     <fieldset className={classNames("field", className)} disabled={readOnly}>
-      <LabelWithHelpIcon label={label} helpText={helpText} />
+      <LabelWithHelpIcon label={label} helpText={helpText} id={id} helpId={helpId} />
       <div className="control">
         <input
+          aria-labelledby={id}
+          aria-describedby={helpId}
           ref={field}
           name={name}
           className={classNames("input", errorView)}

scm-ui/ui-components/src/forms/LabelWithHelpIcon.tsx

@@ -27,24 +27,26 @@ import Help from "../Help";
 type Props = {
   label?: string;
   helpText?: string;
+  id?: string;
+  helpId?: string;
 };
 
 class LabelWithHelpIcon extends React.Component<Props> {
   renderHelp() {
-    const { helpText } = this.props;
+    const { helpText, helpId } = this.props;
     if (helpText) {
-      return <Help message={helpText} />;
+      return <Help message={helpText} id={helpId} />;
     }
   }
 
   render() {
-    const { label } = this.props;
+    const { label, id } = this.props;
 
     if (label) {
       const help = this.renderHelp();
       return (
         <label className="label">
-          {label} {help}
+          <span id={id}>{label}</span> {help}
         </label>
       );
     }

scm-ui/ui-components/src/forms/Radio.tsx

@@ -25,6 +25,7 @@ import React, { ChangeEvent, FC, FocusEvent } from "react";
 import classNames from "classnames";
 import { Help } from "../index";
 import { createFormFieldWrapper, FieldProps, FieldType, isLegacy, isUsingRef } from "./FormFieldTypes";
+import { createA11yId } from "../createA11yId";
 
 type BaseProps = {
   label?: string;
@@ -36,18 +37,23 @@ type BaseProps = {
   defaultChecked?: boolean;
   className?: string;
   readOnly?: boolean;
+  ariaLabelledby?: string;
 };
 
 const InnerRadio: FC<FieldProps<BaseProps, HTMLInputElement, boolean>> = ({
   name,
   defaultChecked,
   readOnly,
+  ariaLabelledby,
   ...props
 }) => {
+  const id = ariaLabelledby || createA11yId("radio");
+  const helpId = createA11yId("radio");
+
   const renderHelp = () => {
     const helpText = props.helpText;
     if (helpText) {
-      return <Help message={helpText} />;
+      return <Help message={helpText} id={helpId} />;
     }
   };
 
@@ -71,6 +77,8 @@ const InnerRadio: FC<FieldProps<BaseProps, HTMLInputElement, boolean>> = ({
     }
   };
 
+  const labelElement = props.label ? (<span id={id}>{props.label}</span>) : null;
+
   return (
     <fieldset className="is-inline-block" disabled={readOnly}>
       {/*
@@ -89,8 +97,10 @@ const InnerRadio: FC<FieldProps<BaseProps, HTMLInputElement, boolean>> = ({
           disabled={props.disabled}
           ref={props.innerRef}
           defaultChecked={defaultChecked}
+          aria-labelledby={id}
+          aria-describedby={helpId}
         />{" "}
-        {props.label}
+        {labelElement}
         {renderHelp()}
       </label>
     </fieldset>

scm-ui/ui-components/src/forms/Select.tsx

@@ -27,6 +27,7 @@ import LabelWithHelpIcon from "./LabelWithHelpIcon";
 import { createAttributesForTesting } from "../devBuild";
 import useInnerRef from "./useInnerRef";
 import { createFormFieldWrapper, FieldProps, FieldType, isLegacy, isUsingRef } from "./FormFieldTypes";
+import { createA11yId } from "../createA11yId";
 
 export type SelectItem = {
   value: string;
@@ -46,6 +47,7 @@ type BaseProps = {
   readOnly?: boolean;
   className?: string;
   addValueToOptions?: boolean;
+  ariaLabelledby?: string;
 };
 
 const InnerSelect: FC<FieldProps<BaseProps, HTMLSelectElement, string>> = ({
@@ -61,6 +63,7 @@ const InnerSelect: FC<FieldProps<BaseProps, HTMLSelectElement, string>> = ({
   className,
   options,
   addValueToOptions,
+  ariaLabelledby,
   ...props
 }) => {
   const field = useInnerRef(props.innerRef);
@@ -106,10 +109,12 @@ const InnerSelect: FC<FieldProps<BaseProps, HTMLSelectElement, string>> = ({
   }, [field, value, name]);
 
   const loadingClass = loading ? "is-loading" : "";
+  const a11yId = ariaLabelledby || createA11yId("select");
+  const helpId = createA11yId("select");
 
   return (
     <fieldset className="field" disabled={readOnly}>
-      <LabelWithHelpIcon label={label} helpText={helpText} />
+      <LabelWithHelpIcon label={label} helpText={helpText} id={a11yId} helpId={helpId} />
       <div className={classNames("control select", loadingClass, className)}>
         <select
           name={name}
@@ -119,6 +124,8 @@ const InnerSelect: FC<FieldProps<BaseProps, HTMLSelectElement, string>> = ({
           onChange={handleInput}
           onBlur={handleBlur}
           disabled={disabled}
+          aria-labelledby={a11yId}
+          aria-describedby={helpId}
           {...createAttributesForTesting(testId)}
         >
           {opts.map((opt) => {

scm-ui/ui-components/src/forms/Textarea.tsx

@@ -26,6 +26,7 @@ import LabelWithHelpIcon from "./LabelWithHelpIcon";
 import useAutofocus from "./useAutofocus";
 import classNames from "classnames";
 import { createFormFieldWrapper, FieldProps, FieldType, isLegacy, isUsingRef } from "./FormFieldTypes";
+import { createA11yId } from "../createA11yId";
 
 type BaseProps = {
   name?: string;
@@ -102,9 +103,12 @@ const InnerTextarea: FC<FieldProps<BaseProps, HTMLTextAreaElement, string>> = ({
     helper = <p className="help is-info">{informationMessage}</p>;
   }
 
+  const id = createA11yId("textarea");
+  const helpId = createA11yId("textarea");
+
   return (
     <fieldset className="field" disabled={readOnly}>
-      <LabelWithHelpIcon label={label} helpText={helpText} />
+      <LabelWithHelpIcon label={label} helpText={helpText} id={id} helpId={helpId} />
       <div className="control">
         <textarea
           className={classNames("textarea", errorView)}
@@ -117,6 +121,8 @@ const InnerTextarea: FC<FieldProps<BaseProps, HTMLTextAreaElement, string>> = ({
           disabled={disabled}
           onKeyDown={onKeyDown}
           defaultValue={defaultValue}
+          aria-labelledby={id}
+          aria-describedby={helpId}
         />
       </div>
       {helper}

scm-ui/ui-components/src/index.ts

@@ -85,6 +85,7 @@ export { regExpPattern as changesetShortLinkRegex } from "./markdown/remarkChang
 export * from "./markdown/PluginApi";
 export * from "./devices";
 export { default as copyToClipboard } from "./CopyToClipboard";
+export { createA11yId } from "./createA11yId";
 
 export { default as comparators } from "./comparators";
 

scm-ui/ui-components/src/layout/GroupEntry.tsx

@@ -25,6 +25,7 @@ import React, { FC, ReactNode } from "react";
 import { Link } from "react-router-dom";
 import classNames from "classnames";
 import styled from "styled-components";
+import { useTranslation } from "react-i18next";
 
 const StyledGroupEntry = styled.div`
   max-height: calc(90px - 1.5rem);
@@ -76,12 +77,18 @@ type Props = {
   description?: string | ReactNode;
   contentRight?: ReactNode;
   link: string;
+  ariaLabel?: string;
 };
 
-const GroupEntry: FC<Props> = ({ link, avatar, title, name, description, contentRight }) => {
+const GroupEntry: FC<Props> = ({ link, avatar, title, name, description, contentRight, ariaLabel }) => {
+  const [t] = useTranslation("repos");
   return (
     <div className="is-relative">
-      <OverlayLink to={link} className="has-hover-background-blue" />
+      <OverlayLink
+        to={link}
+        className="has-hover-background-blue"
+        aria-label={t("overview.ariaLabel", { name: ariaLabel })}
+      />
       <StyledGroupEntry
         className={classNames("is-flex", "is-justify-content-space-between", "is-align-items-center", "p-2")}
         title={title}

scm-ui/ui-components/src/modals/ConfirmAlert.tsx

@@ -69,6 +69,8 @@ export const ConfirmAlert: FC<Props> = ({ title, message, buttons, close }) => {
             className={classNames("button", "is-info", button.className, button.isLoading ? "is-loading" : "")}
             key={index}
             onClick={() => handleClickButton(button)}
+            onKeyDown={(e) => e.key === "Enter" && handleClickButton(button)}
+            tabIndex={0}
           >
             {button.label}
           </button>

scm-ui/ui-components/src/modals/Modal.tsx

@@ -21,11 +21,12 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-import React, { FC } from "react";
+import React, { FC, KeyboardEvent, useRef } from "react";
 import classNames from "classnames";
 import usePortalRootElement from "../usePortalRootElement";
 import ReactDOM from "react-dom";
 import styled from "styled-components";
+import { useTrapFocus } from "../useTrapFocus";
 
 type ModalSize = "S" | "M" | "L";
 
@@ -59,6 +60,13 @@ export const Modal: FC<Props> = ({
   size,
 }) => {
   const portalRootElement = usePortalRootElement("modalsRoot");
+  const initialFocusRef = useRef(null);
+  const trapRef = useTrapFocus({
+    includeContainer: true,
+    initialFocus: initialFocusRef.current,
+    returnFocus: true,
+    updateNodes: false,
+  });
 
   if (!portalRootElement) {
     return null;
@@ -71,13 +79,19 @@ export const Modal: FC<Props> = ({
     showFooter = <footer className="modal-card-foot">{footer}</footer>;
   }
 
+  const onKeyDown = (event: KeyboardEvent<HTMLDivElement>) => {
+    if (closeFunction && "Escape" === event.key) {
+      closeFunction();
+    }
+  };
+
   const modalElement = (
-    <div className={classNames("modal", className, isActive)}>
+    <div className={classNames("modal", className, isActive)} ref={trapRef} onKeyDown={onKeyDown}>
       <div className="modal-background" onClick={closeFunction} />
       <SizedModal className="modal-card" size={size}>
         <header className={classNames("modal-card-head", `has-background-${headColor}`)}>
           <p className={`modal-card-title m-0 has-text-${headTextColor}`}>{title}</p>
-          <button className="delete" aria-label="close" onClick={closeFunction} />
+          <button className="delete" aria-label="close" onClick={closeFunction} ref={initialFocusRef} autoFocus />
         </header>
         <section className="modal-card-body">{body}</section>
         {showFooter}

scm-ui/ui-components/src/repos/RepositoryEntry.tsx

@@ -154,6 +154,7 @@ const RepositoryEntry: FC<Props> = ({ repository, baseDate }) => {
         description={repository.description}
         contentRight={actions}
         link={repositoryLink}
+        ariaLabel={repository.name}
       />
     </>
   );

scm-ui/ui-components/src/useTrapFocus.ts

@@ -0,0 +1,163 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import { MutableRefObject, RefObject, useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { FocusableElement, tabbable } from "tabbable";
+
+type Node = HTMLDivElement | null;
+
+interface UseTrapFocus {
+  includeContainer?: boolean;
+  initialFocus?: "container" | Node;
+  returnFocus?: boolean;
+  updateNodes?: boolean;
+}
+
+// Based on https://tobbelindstrom.com/blog/useTrapFocus/
+
+export const useTrapFocus = (options?: UseTrapFocus): MutableRefObject<Node> => {
+  const node = useRef<Node>(null);
+  const { includeContainer, initialFocus, returnFocus, updateNodes } = useMemo<UseTrapFocus>(
+    () => ({
+      includeContainer: false,
+      initialFocus: null,
+      returnFocus: true,
+      updateNodes: false,
+      ...options,
+    }),
+    [options]
+  );
+  const [tabbableNodes, setTabbableNodes] = useState<FocusableElement[]>([]);
+  const previousFocusedNode = useRef<Node>(document.activeElement as Node);
+
+  const setInitialFocus = useCallback(() => {
+    if (initialFocus === "container") {
+      node.current?.focus();
+    } else {
+      initialFocus?.focus();
+    }
+  }, [initialFocus]);
+
+  const updateTabbableNodes = useCallback(() => {
+    const { current } = node;
+
+    if (current) {
+      const getTabbableNodes = tabbable(current, { includeContainer });
+      setTabbableNodes(getTabbableNodes);
+      return getTabbableNodes;
+    }
+
+    return [];
+  }, [includeContainer]);
+
+  useEffect(() => {
+    updateTabbableNodes();
+    if (node.current) setInitialFocus();
+  }, [setInitialFocus, updateTabbableNodes]);
+
+  useEffect(() => {
+    return () => {
+      const { current } = previousFocusedNode;
+      if (current && returnFocus) current.focus();
+    };
+  }, [returnFocus]);
+
+  const handleKeydown = useCallback(
+    (event) => {
+      const { key, keyCode, shiftKey } = event;
+
+      let getTabbableNodes = tabbableNodes;
+      if (updateNodes) getTabbableNodes = updateTabbableNodes();
+
+      if ((key === "Tab" || keyCode === 9) && getTabbableNodes.length) {
+        const firstNode = getTabbableNodes[0];
+        const lastNode = getTabbableNodes[getTabbableNodes.length - 1];
+        const { activeElement } = document;
+
+        if (!getTabbableNodes.includes(activeElement as FocusableElement)) {
+          event.preventDefault();
+          shiftKey ? lastNode.focus() : firstNode.focus();
+        }
+
+        if (shiftKey && activeElement === firstNode) {
+          event.preventDefault();
+          lastNode.focus();
+        }
+
+        if (!shiftKey && activeElement === lastNode) {
+          event.preventDefault();
+          firstNode.focus();
+        }
+      }
+    },
+    [tabbableNodes, updateNodes, updateTabbableNodes]
+  );
+
+  useEventListener({
+    type: "keydown",
+    listener: handleKeydown,
+  });
+
+  return node;
+};
+
+interface UseEventListener {
+  type: keyof WindowEventMap;
+  listener: EventListener;
+  element?: RefObject<Element> | Document | Window | null;
+  options?: AddEventListenerOptions;
+}
+
+export const useEventListener = ({
+  type,
+  listener,
+  element = isSSR ? undefined : window,
+  options,
+}: UseEventListener): void => {
+  const savedListener = useRef<EventListener>();
+
+  useEffect(() => {
+    savedListener.current = listener;
+  }, [listener]);
+
+  const handleEventListener = useCallback((event: Event) => {
+    savedListener.current?.(event);
+  }, []);
+
+  useEffect(() => {
+    const target = getRefElement(element);
+    target?.addEventListener(type, handleEventListener, options);
+    return () => target?.removeEventListener(type, handleEventListener);
+  }, [type, element, options, handleEventListener]);
+};
+
+const isSSR = !(typeof window !== "undefined" && window.document?.createElement);
+
+const getRefElement = <T>(element?: RefObject<Element> | T): Element | T | undefined | null => {
+  if (element && "current" in element) {
+    return element.current;
+  }
+
+  return element;
+};

scm-ui/ui-webapp/public/locales/de/repos.json

@@ -62,7 +62,8 @@
     "filterRepositories": "Repositories filtern",
     "allNamespaces": "Alle Namespaces",
     "clone": "Clone/Checkout",
-    "contact": "E-Mail senden an {{contact}}"
+    "contact": "E-Mail senden an {{contact}}",
+    "ariaLabel": "Repository {{name}}"
   },
   "create": {
     "title": "Repository hinzufügen",

scm-ui/ui-webapp/public/locales/en/repos.json

@@ -62,7 +62,8 @@
     "filterRepositories": "Filter repositories",
     "allNamespaces": "All namespaces",
     "clone": "Clone/Checkout",
-    "contact": "Send mail to {{contact}}"
+    "contact": "Send mail to {{contact}}",
+    "ariaLabel": "Repository {{name}}"
   },
   "create": {
     "title": "Add Repository",

scm-ui/ui-webapp/src/admin/components/form/GeneralSettings.tsx

@@ -243,6 +243,7 @@ const GeneralSettings: FC<Props> = ({
             buttonLabel={t("general-settings.emergencyContacts.addButton")}
             loadSuggestions={userSuggestions}
             placeholder={t("general-settings.emergencyContacts.autocompletePlaceholder")}
+            helpText={t("general-settings.emergencyContacts.helpText")}
           />
         </div>
       </div>

scm-ui/ui-webapp/src/admin/plugins/components/PluginEntry.tsx

@@ -22,12 +22,12 @@
  * SOFTWARE.
  */
 import React, { FC } from "react";
-import { useTranslation } from "react-i18next";
 import styled from "styled-components";
 import { Link, Plugin } from "@scm-manager/ui-types";
 import { CardColumn, Icon } from "@scm-manager/ui-components";
-import PluginAvatar from "./PluginAvatar";
 import { PluginAction, PluginModalContent } from "../containers/PluginsOverview";
+import { useTranslation } from "react-i18next";
+import PluginAvatar from "./PluginAvatar";
 
 type Props = {
   plugin: Plugin;
@@ -40,7 +40,7 @@ const ActionbarWrapper = styled.div`
   }
 `;
 
-const IconWrapper = styled.span.attrs((props) => ({
+const IconWrapperStyle = styled.span.attrs((props) => ({
   className: "level-item mb-0 p-2 is-clickable",
 }))`
   border: 1px solid #cdcdcd; // $dark-25
@@ -51,6 +51,14 @@ const IconWrapper = styled.span.attrs((props) => ({
   }
 `;
 
+const IconWrapper: FC<{ action: () => void }> = ({ action, children }) => {
+  return (
+    <IconWrapperStyle onClick={action} onKeyDown={(e) => e.key === "Enter" && action()} tabIndex={0}>
+      {children}
+    </IconWrapperStyle>
+  );
+};
+
 const PluginEntry: FC<Props> = ({ plugin, openModal }) => {
   const [t] = useTranslation("admin");
   const isInstallable = plugin._links.install && (plugin._links.install as Link).href;
@@ -81,22 +89,22 @@ const PluginEntry: FC<Props> = ({ plugin, openModal }) => {
   const actionBar = () => (
     <ActionbarWrapper className="is-flex">
       {isCloudoguPlugin && (
-        <IconWrapper onClick={() => openModal({ plugin, action: PluginAction.CLOUDOGU })}>
+        <IconWrapper action={() => openModal({ plugin, action: PluginAction.CLOUDOGU })}>
           <Icon title={t("plugins.modal.cloudoguInstall")} name="link" color="success-dark" />
         </IconWrapper>
       )}
       {isInstallable && (
-        <IconWrapper onClick={() => openModal({ plugin, action: PluginAction.INSTALL })}>
+        <IconWrapper action={() => openModal({ plugin, action: PluginAction.INSTALL })}>
           <Icon title={t("plugins.modal.install")} name="download" color="info" />
         </IconWrapper>
       )}
       {isUninstallable && (
-        <IconWrapper onClick={() => openModal({ plugin, action: PluginAction.UNINSTALL })}>
+        <IconWrapper action={() => openModal({ plugin, action: PluginAction.UNINSTALL })}>
           <Icon title={t("plugins.modal.uninstall")} name="trash" color="info" />
         </IconWrapper>
       )}
       {isUpdatable && (
-        <IconWrapper onClick={() => openModal({ plugin, action: PluginAction.UPDATE })}>
+        <IconWrapper action={() => openModal({ plugin, action: PluginAction.UPDATE })}>
           <Icon title={t("plugins.modal.update")} name="sync-alt" color="info" />
         </IconWrapper>
       )}

scm-ui/ui-webapp/src/containers/Theme.tsx

@@ -23,7 +23,7 @@
  */
 
 import React, { FC, useState } from "react";
-import { Radio, SubmitButton, Subtitle } from "@scm-manager/ui-components";
+import { createA11yId, Radio, SubmitButton, Subtitle } from "@scm-manager/ui-components";
 import { useForm } from "react-hook-form";
 import styled from "styled-components";
 import { useTranslation } from "react-i18next";
@@ -60,12 +60,12 @@ const Theme: FC = () => {
     register,
     setValue,
     handleSubmit,
-    formState: { isDirty },
+    formState: { isDirty }
   } = useForm<ThemeForm>({
     mode: "onChange",
     defaultValues: {
-      theme,
-    },
+      theme
+    }
   });
   const [t] = useTranslation("commons");
 
@@ -77,21 +77,24 @@ const Theme: FC = () => {
     <>
       <Subtitle>{t("profile.theme.subtitle")}</Subtitle>
       <form onSubmit={handleSubmit(onSubmit)}>
-        {themes.map((theme) => (
-          <div
-            key={theme}
-            onClick={() => setValue("theme", theme, { shouldDirty: true })}
-            className="card ml-1 mb-5 control columns is-vcentered has-cursor-pointer"
-          >
-            <RadioColumn className="column">
-              <Radio {...register("theme")} value={theme} disabled={isLoading} />
-            </RadioColumn>
-            <div className="column content">
-              <h3>{t(`profile.theme.${theme}.displayName`)}</h3>
-              <p>{t(`profile.theme.${theme}.description`)}</p>
+        {themes.map(theme => {
+          const a11yId = createA11yId("theme");
+          return (
+            <div
+              key={theme}
+              onClick={() => setValue("theme", theme, { shouldDirty: true })}
+              className="card ml-1 mb-5 control columns is-vcentered has-cursor-pointer"
+            >
+              <RadioColumn className="column">
+                <Radio {...register("theme")} value={theme} disabled={isLoading} ariaLabelledby={a11yId} />
+              </RadioColumn>
+              <div id={a11yId} className="column content">
+                <h3>{t(`profile.theme.${theme}.displayName`)}</h3>
+                <p>{t(`profile.theme.${theme}.description`)}</p>
+              </div>
             </div>
-          </div>
-        ))}
+          );
+        })}
         <SubmitButton label={t("profile.theme.submit")} loading={isLoading} disabled={!isDirty} />
       </form>
     </>

scm-ui/ui-webapp/src/groups/components/table/Details.tsx

@@ -48,7 +48,7 @@ class Details extends React.Component<Props> {
           <tr>
             <th>{t("group.external")}</th>
             <td>
-              <Checkbox checked={group.external} />
+              <Checkbox checked={group.external} readOnly={true} />
             </td>
           </tr>
           <tr>

scm-ui/ui-webapp/src/repos/branches/components/BranchRow.tsx

@@ -42,7 +42,7 @@ const BranchRow: FC<Props> = ({ baseUrl, branch, onDelete }) => {
   let deleteButton;
   if ((branch?._links?.delete as Link)?.href) {
     deleteButton = (
-      <span className="icon is-small is-hovered" onClick={() => onDelete(branch)}>
+      <span className="icon is-small is-hovered" onClick={() => onDelete(branch)} onKeyDown={(e) => e.key === "Enter" && onDelete(branch)} tabIndex={0}>
         <Icon name="trash" className="fas " title={t("branch.delete.button")} />
       </span>
     );

scm-ui/ui-webapp/src/repos/branches/containers/BranchesOverview.tsx

@@ -46,7 +46,7 @@ const BranchesOverview: FC<Props> = ({ repository, baseUrl }) => {
     return <Loading />;
   }
 
-  const branches = data._embedded.branches || [];
+  const branches = data?._embedded?.branches || [];
 
   if (branches.length === 0) {
     return <Notification type="info">{t("branches.overview.noBranches")}</Notification>;

scm-ui/ui-webapp/src/repos/codeSection/components/FileSearchButton.tsx

@@ -39,7 +39,7 @@ const SearchIcon = styled(Icon)`
 const FileSearchButton: FC<Props> = ({ baseUrl, revision }) => {
   const [t] = useTranslation("repos");
   return (
-    <Link to={`${baseUrl}/search/${encodeURIComponent(revision)}`}>
+    <Link to={`${baseUrl}/search/${encodeURIComponent(revision)}`} aria-label={t("fileSearch.button.title")}>
       <SearchIcon title={t("fileSearch.button.title")} name="search" color="inherit" />
     </Link>
   );

scm-ui/ui-webapp/src/repos/codeSection/containers/FileSearch.tsx

@@ -91,6 +91,7 @@ const FileSearch: FC<Props> = ({ repository, baseUrl, branches, selectedBranch }
   };
 
   const contentBaseUrl = `${baseUrl}/sources/${revision}/`;
+  const id = useA11yId("file-search");
 
   return (
     <>
@@ -121,8 +122,9 @@ const FileSearch: FC<Props> = ({ repository, baseUrl, branches, selectedBranch }
             value={query}
             filter={search}
             autoFocus={true}
+            id={id}
           />
-          <Help className="ml-3" message={t("fileSearch.input.help")} />
+          <Help className="ml-3" message={t("fileSearch.input.help")} id={id} />
         </div>
         <ErrorNotification error={error} />
         {isLoading ? <Loading /> : <FileSearchResults contentBaseUrl={contentBaseUrl} query={query} paths={result} />}

scm-ui/ui-webapp/src/repos/permissions/components/DeletePermissionButton.tsx

@@ -78,7 +78,13 @@ const DeletePermissionButton: FC<Props> = ({ namespaceOrRepository, permission,
   return (
     <>
       <ErrorNotification error={error} />
-      <Icon name="trash" onClick={action} />
+      <Icon
+        name="trash"
+        onClick={action}
+        onEnter={action}
+        tabIndex={0}
+        title={t("permission.delete-permission-button.label")}
+      />
     </>
   );
 };

scm-ui/ui-webapp/src/repos/sources/components/FileIcon.tsx

@@ -33,11 +33,13 @@ type Props = {
 const FileIcon: FC<Props> = ({ file }) => {
   const [t] = useTranslation("repos");
   if (file.subRepository) {
-    return <Icon title={t("sources.fileTree.subRepository")} iconStyle="far" name="folder" color="inherit" />;
+    return (
+      <Icon title={t("sources.fileTree.subRepository")} iconStyle="far" name="folder" color="inherit" tabIndex={-1} />
+    );
   } else if (file.directory) {
-    return <Icon title={t("sources.fileTree.folder")} name="folder" color="inherit" />;
+    return <Icon title={t("sources.fileTree.folder")} name="folder" color="inherit" tabIndex={-1} />;
   }
-  return <Icon title={t("sources.fileTree.file")} name="file" color="inherit" />;
+  return <Icon title={t("sources.fileTree.file")} name="file" color="inherit" tabIndex={-1} />;
 };
 
 export default FileIcon;

scm-ui/ui-webapp/src/repos/sources/components/FileTreeLeaf.tsx

@@ -57,7 +57,7 @@ const ExtensionTd = styled.td`
 class FileTreeLeaf extends React.Component<Props> {
   createFileIcon = (file: File) => {
     return (
-      <FileLink baseUrl={this.props.baseUrl} file={file}>
+      <FileLink baseUrl={this.props.baseUrl} file={file} tabIndex={-1}>
         <FileIcon file={file} />
       </FileLink>
     );
@@ -65,7 +65,7 @@ class FileTreeLeaf extends React.Component<Props> {
 
   createFileName = (file: File) => {
     return (
-      <FileLink baseUrl={this.props.baseUrl} file={file}>
+      <FileLink baseUrl={this.props.baseUrl} file={file} tabIndex={0}>
         {file.name}
       </FileLink>
     );

scm-ui/ui-webapp/src/repos/sources/components/content/FileLink.tsx

@@ -31,6 +31,7 @@ type Props = {
   baseUrl: string;
   file: File;
   children: ReactNode;
+  tabIndex?: number;
 };
 
 const isLocalRepository = (repositoryUrl: string) => {
@@ -74,7 +75,7 @@ export const createFolderLink = (base: string, file: File) => {
   return link;
 };
 
-const FileLink: FC<Props> = ({ baseUrl, file, children }) => {
+const FileLink: FC<Props> = ({ baseUrl, file, children, tabIndex }) => {
   const [t] = useTranslation("repos");
   if (file?.subRepository?.repositoryUrl) {
     // file link represents a subRepository
@@ -87,13 +88,21 @@ const FileLink: FC<Props> = ({ baseUrl, file, children }) => {
       if (file.subRepository.revision && isLocalRepository(link)) {
         link += "/code/sources/" + file.subRepository.revision;
       }
-      return <a href={link}>{children}</a>;
+      return (
+        <a href={link} tabIndex={tabIndex}>
+          {children}
+        </a>
+      );
     } else if (link.startsWith("ssh://") && isLocalRepository(link)) {
       link = createRelativeLink(link);
       if (file.subRepository.revision) {
         link += "/code/sources/" + file.subRepository.revision;
       }
-      return <Link to={link}>{children}</Link>;
+      return (
+        <Link to={link} tabIndex={tabIndex}>
+          {children}
+        </Link>
+      );
     } else {
       // subRepository url cannot be linked
       return (
@@ -104,7 +113,11 @@ const FileLink: FC<Props> = ({ baseUrl, file, children }) => {
     }
   }
   // normal file or folder
-  return <Link to={createFolderLink(baseUrl, file)}>{children}</Link>;
+  return (
+    <Link to={createFolderLink(baseUrl, file)} tabIndex={tabIndex}>
+      {children}
+    </Link>
+  );
 };
 
 export default FileLink;

scm-ui/ui-webapp/src/repos/tags/components/TagRow.tsx

@@ -25,7 +25,7 @@ import React, { FC } from "react";
 import { Link as RouterLink } from "react-router-dom";
 import { useTranslation } from "react-i18next";
 import classNames from "classnames";
-import { Link, Tag } from "@scm-manager/ui-types";
+import { Tag, Link } from "@scm-manager/ui-types";
 import { DateFromNow, Icon } from "@scm-manager/ui-components";
 
 type Props = {
@@ -41,7 +41,7 @@ const TagRow: FC<Props> = ({ tag, baseUrl, onDelete }) => {
   let deleteButton;
   if ((tag?._links?.delete as Link)?.href) {
     deleteButton = (
-      <span className="icon is-small" onClick={() => onDelete(tag)}>
+      <span className="icon is-small" onClick={() => onDelete(tag)} onKeyDown={(e) => e.key === "Enter" && onDelete(tag)} tabIndex={0}>
         <Icon name="trash" className="fas" title={t("tag.delete.button")} />
       </span>
     );

scm-ui/ui-webapp/src/repos/tags/container/TagsOverview.tsx

@@ -47,7 +47,7 @@ const TagsOverview: FC<Props> = ({ repository, baseUrl }) => {
     return <Loading />;
   }
 
-  const tags = data?._embedded.tags || [];
+  const tags = data?._embedded?.tags || [];
   orderTags(tags);
 
   return (

scm-ui/ui-webapp/src/users/components/table/Details.tsx

@@ -53,13 +53,13 @@ class Details extends React.Component<Props> {
           <tr>
             <th>{t("user.active")}</th>
             <td>
-              <Checkbox checked={user.active} />
+              <Checkbox checked={user.active} readOnly={true} />
             </td>
           </tr>
           <tr>
             <th>{t("user.externalFlag")}</th>
             <td>
-              <Checkbox checked={!!user.external} />
+              <Checkbox checked={user.external} readOnly={true} />
             </td>
           </tr>
           <tr>

yarn.lock

@@ -19714,6 +19714,11 @@ systemjs@0.21.6:
   resolved "https://registry.yarnpkg.com/systemjs/-/systemjs-0.21.6.tgz#9d15e79d9f60abbac23f0d179f887ec01f260a1b"
   integrity sha512-R+5S9eV9vcQgWOoS4D87joZ4xkFJHb19ZsyKY07D1+VBDE9bwYcU+KXE0r5XlDA8mFoJGyuWDbfrNoh90JsA8g==
 
+tabbable@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/tabbable/-/tabbable-5.2.1.tgz#e3fda7367ddbb172dcda9f871c0fdb36d1c4cd9c"
+  integrity sha512-40pEZ2mhjaZzK0BnI+QGNjJO8UYx9pP5v7BGe17SORTO0OEuuaAwQTkAp8whcZvqon44wKFOikD+Al11K3JICQ==
+
 table@^6.0.4:
   version "6.7.0"
   resolved "https://registry.yarnpkg.com/table/-/table-6.7.0.tgz#26274751f0ee099c547f6cb91d3eff0d61d155b2"