fix: add accessible descriptions to the dropdowns (#7112)

This PR adds accessible descriptions to the dropdown widgets in the new
project creation form. The description is the same as we show in the
background

frontend/src/component/project/Project/CreateProject/NewProjectForm.tsx

@@ -154,6 +154,25 @@ export const NewProjectForm: React.FC<FormProps> = ({
 
     const stickinessOptions = useStickinessOptions(projectStickiness);
 
+    const selectionButtonData = {
+        environments: {
+            icon: <EnvironmentsIcon />,
+            text: `Each feature flag can have a separate configuration per environment. This setting configures which environments your project should start with.`,
+        },
+        stickiness: {
+            icon: <StickinessIcon />,
+            text: 'Stickiness is used to guarantee that your users see the same result when using a gradual rollout. Default stickiness allows you to choose which field is used by default in this project.',
+        },
+        mode: {
+            icon: <ProjectModeIcon />,
+            text: 'Mode defines who should be allowed to interact and see your project. Private mode hides the project from anyone except the project owner and members.',
+        },
+        changeRequests: {
+            icon: <ChangeRequestIcon />,
+            text: 'Change requests can be configured per environment and require changes to go through an approval process before being applied.',
+        },
+    };
+
     return (
         <StyledForm
             onSubmit={(submitEvent) => {
@@ -207,6 +226,7 @@ export const NewProjectForm: React.FC<FormProps> = ({
 
             <OptionButtons>
                 <MultiselectList
+                    description={selectionButtonData.environments.text}
                     selectedOptions={projectEnvironments}
                     options={activeEnvironments.map((env) => ({
                         label: env.name,
@@ -225,15 +245,13 @@ export const NewProjectForm: React.FC<FormProps> = ({
                         placeholder: 'Select project environments',
                     }}
                     onOpen={() =>
-                        overrideDocumentation({
-                            icon: <EnvironmentsIcon />,
-                            text: `Each feature flag can have a separate configuration per environment. This setting configures which environments your project should start with.`,
-                        })
+                        overrideDocumentation(selectionButtonData.environments)
                     }
                     onClose={clearDocumentationOverride}
                 />
 
                 <SingleSelectList
+                    description={selectionButtonData.stickiness.text}
                     options={stickinessOptions.map(({ key, ...rest }) => ({
                         value: key,
                         ...rest,
@@ -250,10 +268,7 @@ export const NewProjectForm: React.FC<FormProps> = ({
                         placeholder: 'Select default stickiness',
                     }}
                     onOpen={() =>
-                        overrideDocumentation({
-                            icon: <StickinessIcon />,
-                            text: 'Stickiness is used to guarantee that your users see the same result when using a gradual rollout. Default stickiness allows you to choose which field is used by default in this project.',
-                        })
+                        overrideDocumentation(selectionButtonData.stickiness)
                     }
                     onClose={clearDocumentationOverride}
                 />
@@ -262,6 +277,7 @@ export const NewProjectForm: React.FC<FormProps> = ({
                     condition={isEnterprise()}
                     show={
                         <SingleSelectList
+                            description={selectionButtonData.mode.text}
                             options={projectModeOptions}
                             onChange={(value: any) => {
                                 setProjectMode(value);
@@ -275,10 +291,7 @@ export const NewProjectForm: React.FC<FormProps> = ({
                                 placeholder: 'Select project mode',
                             }}
                             onOpen={() =>
-                                overrideDocumentation({
-                                    icon: <ProjectModeIcon />,
-                                    text: 'Mode defines who should be allowed to interact and see your project. Private mode hides the project from anyone except the project owner and members.',
-                                })
+                                overrideDocumentation(selectionButtonData.mode)
                             }
                             onClose={clearDocumentationOverride}
                         />
@@ -288,6 +301,9 @@ export const NewProjectForm: React.FC<FormProps> = ({
                     condition={isEnterprise()}
                     show={
                         <TableSelect
+                            description={
+                                selectionButtonData.changeRequests.text
+                            }
                             disabled={projectEnvironments.size === 0}
                             activeEnvironments={activeEnvironments
                                 .filter((env) =>
@@ -321,10 +337,9 @@ export const NewProjectForm: React.FC<FormProps> = ({
                                 projectChangeRequestConfiguration
                             }
                             onOpen={() =>
-                                overrideDocumentation({
-                                    icon: <ChangeRequestIcon />,
-                                    text: 'Change requests can be configured per environment and require changes to go through an approval process before being applied.',
-                                })
+                                overrideDocumentation(
+                                    selectionButtonData.changeRequests,
+                                )
                             }
                             onClose={clearDocumentationOverride}
                         />

frontend/src/component/project/Project/CreateProject/SelectionButton.styles.tsx

@@ -40,6 +40,11 @@ const visuallyHiddenStyles = {
     whiteSpace: 'nowrap',
 };
 
+export const HiddenDescription = styled('p')(() => ({
+    ...visuallyHiddenStyles,
+    position: 'absolute',
+}));
+
 export const StyledDropdownSearch = styled(TextField, {
     shouldForwardProp: (prop) => prop !== 'hideLabel',
 })<{ hideLabel?: boolean }>(({ theme, hideLabel }) => ({

frontend/src/component/project/Project/CreateProject/SelectionButton.tsx

@@ -1,4 +1,5 @@
 import Search from '@mui/icons-material/Search';
+import { v4 as uuidv4 } from 'uuid';
 import { Box, Button, InputAdornment, List, ListItemText } from '@mui/material';
 import { type FC, type ReactNode, useRef, useState, useMemo } from 'react';
 import {
@@ -8,6 +9,7 @@ import {
     StyledPopover,
     StyledDropdownSearch,
     TableSearchInput,
+    HiddenDescription,
 } from './SelectionButton.styles';
 import { ChangeRequestTable } from './ChangeRequestTable';
 
@@ -81,6 +83,7 @@ type CombinedSelectProps = {
     multiselect?: { selectedOptions: Set<string> };
     onOpen?: () => void;
     onClose?: () => void;
+    description: string; // visually hidden, for assistive tech
 };
 
 const CombinedSelect: FC<CombinedSelectProps> = ({
@@ -91,10 +94,12 @@ const CombinedSelect: FC<CombinedSelectProps> = ({
     multiselect,
     onOpen = () => {},
     onClose = () => {},
+    description,
 }) => {
     const ref = useRef<HTMLDivElement>(null);
     const [anchorEl, setAnchorEl] = useState<HTMLDivElement | null>();
     const [searchText, setSearchText] = useState('');
+    const descriptionId = uuidv4();
     const [recentlyClosed, setRecentlyClosed] = useState(false);
 
     const open = () => {
@@ -156,7 +161,10 @@ const CombinedSelect: FC<CombinedSelectProps> = ({
                     horizontal: 'left',
                 }}
             >
-                <StyledDropdown>
+                <HiddenDescription id={descriptionId}>
+                    {description}
+                </HiddenDescription>
+                <StyledDropdown aria-describedby={descriptionId}>
                     <StyledDropdownSearch
                         variant='outlined'
                         size='small'
@@ -186,6 +194,7 @@ const CombinedSelect: FC<CombinedSelectProps> = ({
 
                             return (
                                 <StyledListItem
+                                    aria-describedby={labelId}
                                     key={option.value}
                                     dense
                                     disablePadding
@@ -234,7 +243,7 @@ const CombinedSelect: FC<CombinedSelectProps> = ({
 
 type MultiselectListProps = Pick<
     CombinedSelectProps,
-    'options' | 'button' | 'search' | 'onOpen' | 'onClose'
+    'options' | 'button' | 'search' | 'onOpen' | 'onClose' | 'description'
 > & {
     selectedOptions: Set<string>;
     onChange: (values: Set<string>) => void;
@@ -270,7 +279,13 @@ export const MultiselectList: FC<MultiselectListProps> = ({
 
 type SingleSelectListProps = Pick<
     CombinedSelectProps,
-    'options' | 'button' | 'search' | 'onChange' | 'onOpen' | 'onClose'
+    | 'options'
+    | 'button'
+    | 'search'
+    | 'onChange'
+    | 'onOpen'
+    | 'onClose'
+    | 'description'
 >;
 
 export const SingleSelectList: FC<SingleSelectListProps> = (props) => {
@@ -279,7 +294,7 @@ export const SingleSelectList: FC<SingleSelectListProps> = (props) => {
 
 type TableSelectProps = Pick<
     CombinedSelectProps,
-    'button' | 'search' | 'onOpen' | 'onClose'
+    'button' | 'search' | 'onOpen' | 'onClose' | 'description'
 > & {
     updateProjectChangeRequestConfiguration: {
         disableChangeRequests: (env: string) => void;