Merge branch 'develop' into dbkr/email_phone_css_temporary_move

babel.config.js

@@ -10,15 +10,15 @@ module.exports = {
                     "last 2 Safari versions",
                     "last 2 Edge versions",
                 ],
+                include: ["@babel/plugin-transform-class-properties"],
             },
         ],
-        "@babel/preset-typescript",
+        ["@babel/preset-typescript", { allowDeclareFields: true }],
         "@babel/preset-react",
     ],
     plugins: [
         "@babel/plugin-proposal-export-default-from",
         "@babel/plugin-transform-numeric-separator",
-        "@babel/plugin-transform-class-properties",
         "@babel/plugin-transform-object-rest-spread",
         "@babel/plugin-syntax-dynamic-import",
         "@babel/plugin-transform-runtime",

playwright/plugins/homeserver/dendrite/index.ts

@@ -29,7 +29,6 @@ const dendriteConfigFile = "dendrite.yaml";
 
 // Surprisingly, Dendrite implements the same register user Admin API Synapse, so we can just extend it
 export class Dendrite extends Synapse implements Homeserver, HomeserverInstance {
-    public config: HomeserverConfig & { serverId: string };
     protected image = "matrixdotorg/dendrite-monolith:main";
     protected entrypoint = "/usr/bin/dendrite";
 

playwright/tsconfig.json

@@ -1,8 +1,8 @@
 {
     "compilerOptions": {
-        "target": "es2018",
+        "target": "es2022",
         "jsx": "react",
-        "lib": ["ESNext", "es2021", "dom", "dom.iterable"],
+        "lib": ["ESNext", "es2022", "dom", "dom.iterable"],
         "resolveJsonModule": true,
         "esModuleInterop": true,
         "moduleResolution": "node",

src/@types/global.d.ts

@@ -144,69 +144,14 @@ declare global {
         usageDetails?: { [key: string]: number };
     }
 
-    // https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas
-    interface OffscreenCanvas {
-        convertToBlob(opts?: { type?: string; quality?: number }): Promise<Blob>;
-    }
-
-    interface HTMLAudioElement {
-        type?: string;
-    }
-
-    interface HTMLVideoElement {
-        type?: string;
-    }
-
-    // Add Chrome-specific `instant` ScrollBehaviour
-    type _ScrollBehavior = ScrollBehavior | "instant";
-
-    interface _ScrollOptions {
-        behavior?: _ScrollBehavior;
-    }
-
-    interface _ScrollIntoViewOptions extends _ScrollOptions {
-        block?: ScrollLogicalPosition;
-        inline?: ScrollLogicalPosition;
-    }
-
     interface Element {
         // Safari & IE11 only have this prefixed: we used prefixed versions
         // previously so let's continue to support them for now
         webkitRequestFullScreen(options?: FullscreenOptions): Promise<void>;
         msRequestFullscreen(options?: FullscreenOptions): Promise<void>;
-        scrollIntoView(arg?: boolean | _ScrollIntoViewOptions): void;
+        // scrollIntoView(arg?: boolean | _ScrollIntoViewOptions): void;
     }
 
-    interface Error {
-        // Standard
-        // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/cause
-        cause?: unknown;
-
-        // Non-standard
-        // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/fileName
-        fileName?: string;
-        // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/lineNumber
-        lineNumber?: number;
-        // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/columnNumber
-        columnNumber?: number;
-    }
-
-    // We can remove these pieces if we ever update to `target: "es2022"` in our
-    // TypeScript config which supports the new `cause` property, see
-    // https://github.com/vector-im/element-web/issues/24913
-    interface ErrorOptions {
-        // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/cause
-        cause?: unknown;
-    }
-
-    interface ErrorConstructor {
-        new (message?: string, options?: ErrorOptions): Error;
-        (message?: string, options?: ErrorOptions): Error;
-    }
-
-    // eslint-disable-next-line no-var
-    var Error: ErrorConstructor;
-
     // https://github.com/microsoft/TypeScript/issues/28308#issuecomment-650802278
     interface AudioWorkletProcessor {
         readonly port: MessagePort;

src/components/structures/EmbeddedPage.tsx

@@ -45,7 +45,7 @@ interface IState {
 
 export default class EmbeddedPage extends React.PureComponent<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
     private unmounted = false;
     private dispatcherRef: string | null = null;
 

src/components/structures/FilePanel.tsx

@@ -59,7 +59,7 @@ interface IState {
  */
 class FilePanel extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     // This is used to track if a decrypted event was a live event and should be
     // added to the timeline.

src/components/structures/MessagePanel.tsx

@@ -205,7 +205,7 @@ interface IReadReceiptForUser {
  */
 export default class MessagePanel extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public static defaultProps = {
         disableGrouping: false,

src/components/structures/NotificationPanel.tsx

@@ -42,7 +42,7 @@ interface IState {
  */
 export default class NotificationPanel extends React.PureComponent<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private card = React.createRef<HTMLDivElement>();
 

src/components/structures/RightPanel.tsx

@@ -73,7 +73,7 @@ interface IState {
 
 export default class RightPanel extends React.Component<Props, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: Props, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/structures/RoomStatusBar.tsx

@@ -97,11 +97,10 @@ interface IState {
 export default class RoomStatusBar extends React.PureComponent<IProps, IState> {
     private unmounted = false;
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);
-        this.context = context; // XXX: workaround for lack of `declare` support on `public context!:` definition
 
         this.state = {
             syncState: this.context.getSyncState(),

src/components/structures/RoomView.tsx

@@ -417,7 +417,7 @@ export class RoomView extends React.Component<IRoomProps, IRoomState> {
     private roomViewBody = createRef<HTMLDivElement>();
 
     public static contextType = SDKContext;
-    public context!: React.ContextType<typeof SDKContext>;
+    public declare context: React.ContextType<typeof SDKContext>;
 
     public constructor(props: IRoomProps, context: React.ContextType<typeof SDKContext>) {
         super(props, context);

src/components/structures/SpaceRoomView.tsx

@@ -605,7 +605,7 @@ const SpaceSetupPrivateInvite: React.FC<{
 
 export default class SpaceRoomView extends React.PureComponent<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     private readonly dispatcherRef: string;
 

src/components/structures/ThreadView.tsx

@@ -83,7 +83,7 @@ interface IState {
 
 export default class ThreadView extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private dispatcherRef: string | null = null;
     private readonly layoutWatcherRef: string;

src/components/structures/TimelinePanel.tsx

@@ -241,7 +241,7 @@ interface IEventIndexOpts {
  */
 class TimelinePanel extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     // a map from room id to read marker event timestamp
     public static roomReadMarkerTsMap: Record<string, number> = {};
@@ -273,7 +273,6 @@ class TimelinePanel extends React.Component<IProps, IState> {
 
     public constructor(props: IProps, context: React.ContextType<typeof RoomContext>) {
         super(props, context);
-        this.context = context;
 
         debuglog("mounting");
 

src/components/structures/UserMenu.tsx

@@ -90,7 +90,7 @@ const below = (rect: PartialDOMRect): MenuProps => {
 
 export default class UserMenu extends React.Component<IProps, IState> {
     public static contextType = SDKContext;
-    public context!: React.ContextType<typeof SDKContext>;
+    public declare context: React.ContextType<typeof SDKContext>;
 
     private dispatcherRef?: string;
     private themeWatcherRef?: string;
@@ -100,7 +100,6 @@ export default class UserMenu extends React.Component<IProps, IState> {
     public constructor(props: IProps, context: React.ContextType<typeof SDKContext>) {
         super(props, context);
 
-        this.context = context;
         this.state = {
             contextMenuPosition: null,
             isDarkTheme: this.isUserOnDarkTheme(),

src/components/structures/UserView.tsx

@@ -41,7 +41,7 @@ interface IState {
 
 export default class UserView extends React.Component<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/structures/auth/SoftLogout.tsx

@@ -72,13 +72,11 @@ interface IState {
 
 export default class SoftLogout extends React.Component<IProps, IState> {
     public static contextType = SDKContext;
-    public context!: React.ContextType<typeof SDKContext>;
+    public declare context: React.ContextType<typeof SDKContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof SDKContext>) {
         super(props, context);
 
-        this.context = context;
-
         this.state = {
             loginView: LoginView.Loading,
             busy: false,

src/components/views/context_menus/MessageContextMenu.tsx

@@ -133,7 +133,7 @@ interface IState {
 
 export default class MessageContextMenu extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private reactButtonRef = createRef<any>(); // XXX Ref to a functional component
 

src/components/views/elements/AppTile.tsx

@@ -120,7 +120,7 @@ interface IState {
 
 export default class AppTile extends React.Component<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: ContextType<typeof MatrixClientContext>;
+    public declare context: ContextType<typeof MatrixClientContext>;
 
     public static defaultProps: Partial<IProps> = {
         waitForIframeLoad: true,
@@ -144,7 +144,6 @@ export default class AppTile extends React.Component<IProps, IState> {
 
     public constructor(props: IProps, context: ContextType<typeof MatrixClientContext>) {
         super(props, context);
-        this.context = context; // XXX: workaround for lack of `declare` support on `public context!:` definition
 
         // Tiles in miniMode are floating, and therefore not docked
         if (!this.props.miniMode) {

src/components/views/elements/EventListSummary.tsx

@@ -81,7 +81,7 @@ export default class EventListSummary extends React.Component<
     IProps & Required<Pick<IProps, "summaryLength" | "threshold" | "avatarsMaxLength" | "layout">>
 > {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public static defaultProps = {
         summaryLength: 1,

src/components/views/elements/PersistentApp.tsx

@@ -32,7 +32,7 @@ interface IProps {
 
 export default class PersistentApp extends React.Component<IProps> {
     public static contextType = MatrixClientContext;
-    public context!: ContextType<typeof MatrixClientContext>;
+    public declare context: ContextType<typeof MatrixClientContext>;
     private room: Room;
 
     public constructor(props: IProps, context: ContextType<typeof MatrixClientContext>) {

src/components/views/elements/ReplyChain.tsx

@@ -73,7 +73,7 @@ interface IState {
 // be low as each event being loaded (after the first) is triggered by an explicit user action.
 export default class ReplyChain extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private unmounted = false;
     private room: Room;

src/components/views/elements/RoomAliasField.tsx

@@ -41,7 +41,7 @@ interface IState {
 // Controlled form component wrapping Field for inputting a room alias scoped to a given domain
 export default class RoomAliasField extends React.PureComponent<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     private fieldRef = createRef<Field>();
 

src/components/views/emojipicker/ReactionPicker.tsx

@@ -37,7 +37,7 @@ interface IState {
 
 class ReactionPicker extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof RoomContext>) {
         super(props, context);

src/components/views/emojipicker/Search.tsx

@@ -31,7 +31,7 @@ interface IProps {
 
 class Search extends React.PureComponent<IProps> {
     public static contextType = RovingTabIndexContext;
-    public context!: React.ContextType<typeof RovingTabIndexContext>;
+    public declare context: React.ContextType<typeof RovingTabIndexContext>;
 
     private inputRef = React.createRef<HTMLInputElement>();
 

src/components/views/location/LocationPicker.tsx

@@ -50,7 +50,7 @@ const isSharingOwnLocation = (shareType: LocationShareType): boolean =>
 
 class LocationPicker extends React.Component<ILocationPickerProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
     private map?: maplibregl.Map;
     private geolocate?: maplibregl.GeolocateControl;
     private marker?: maplibregl.Marker;

src/components/views/messages/EditHistoryMessage.tsx

@@ -52,7 +52,7 @@ interface IState {
 
 export default class EditHistoryMessage extends React.PureComponent<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     private content = createRef<HTMLDivElement>();
     private pills: Element[] = [];
@@ -60,7 +60,6 @@ export default class EditHistoryMessage extends React.PureComponent<IProps, ISta
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);
-        this.context = context;
 
         const cli = this.context;
         const userId = cli.getSafeUserId();

src/components/views/messages/MAudioBody.tsx

@@ -38,7 +38,7 @@ interface IState {
 
 export default class MAudioBody extends React.PureComponent<IBodyProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public state: IState = {};
 

src/components/views/messages/MFileBody.tsx

@@ -106,7 +106,7 @@ interface IState {
 
 export default class MFileBody extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public state: IState = {};
 

src/components/views/messages/MImageBody.tsx

@@ -65,7 +65,7 @@ interface IState {
 
 export default class MImageBody extends React.Component<IBodyProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private unmounted = true;
     private image = createRef<HTMLImageElement>();

src/components/views/messages/MLocationBody.tsx

@@ -38,7 +38,7 @@ interface IState {
 
 export default class MLocationBody extends React.Component<IBodyProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     private unmounted = false;
     private mapId: string;

src/components/views/messages/MPollBody.tsx

@@ -147,7 +147,7 @@ export function launchPollEditor(mxEvent: MatrixEvent, getRelationsForEvent?: Ge
 
 export default class MPollBody extends React.Component<IBodyProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
     private seenEventIds: string[] = []; // Events we have already seen
 
     public constructor(props: IBodyProps, context: React.ContextType<typeof MatrixClientContext>) {

src/components/views/messages/MVideoBody.tsx

@@ -42,7 +42,7 @@ interface IState {
 
 export default class MVideoBody extends React.PureComponent<IBodyProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private videoRef = React.createRef<HTMLVideoElement>();
     private sizeWatcher?: string;

src/components/views/messages/MessageActionBar.tsx

@@ -261,7 +261,7 @@ interface IMessageActionBarProps {
 
 export default class MessageActionBar extends React.PureComponent<IMessageActionBarProps> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public componentDidMount(): void {
         if (this.props.mxEvent.status && this.props.mxEvent.status !== EventStatus.SENT) {

src/components/views/messages/MessageEvent.tsx

@@ -90,7 +90,7 @@ export default class MessageEvent extends React.Component<IProps> implements IMe
     private evTypes = new Map<string, React.ComponentType<IBodyProps>>(baseEvTypes.entries());
 
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/views/messages/ReactionsRow.tsx

@@ -83,11 +83,10 @@ interface IState {
 
 export default class ReactionsRow extends React.PureComponent<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof RoomContext>) {
         super(props, context);
-        this.context = context;
 
         this.state = {
             myReactions: this.getMyReactions(),

src/components/views/messages/ReactionsRowButton.tsx

@@ -46,7 +46,7 @@ export interface IProps {
 
 export default class ReactionsRowButton extends React.PureComponent<IProps> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public onClick = (): void => {
         const { mxEvent, myReactionEvent, content } = this.props;

src/components/views/messages/ReactionsRowButtonTooltip.tsx

@@ -36,7 +36,7 @@ interface IProps {
 
 export default class ReactionsRowButtonTooltip extends React.PureComponent<PropsWithChildren<IProps>> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public render(): React.ReactNode {
         const { content, reactionEvents, mxEvent, children } = this.props;

src/components/views/messages/TextualBody.tsx

@@ -66,7 +66,7 @@ export default class TextualBody extends React.Component<IBodyProps, IState> {
     private tooltips: Element[] = [];
 
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public state = {
         links: [],

src/components/views/right_panel/TimelineCard.tsx

@@ -77,7 +77,7 @@ interface IState {
 
 export default class TimelineCard extends React.Component<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private dispatcherRef?: string;
     private layoutWatcherRef?: string;

src/components/views/room_settings/AliasSettings.tsx

@@ -102,7 +102,7 @@ interface IState {
 
 export default class AliasSettings extends React.Component<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: ContextType<typeof MatrixClientContext>;
+    public declare context: ContextType<typeof MatrixClientContext>;
 
     public static defaultProps = {
         canSetAliases: false,

src/components/views/rooms/Autocomplete.tsx

@@ -56,7 +56,7 @@ export default class Autocomplete extends React.PureComponent<IProps, IState> {
     private containerRef = createRef<HTMLDivElement>();
 
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof RoomContext>) {
         super(props, context);

src/components/views/rooms/EditMessageComposer.tsx

@@ -129,7 +129,7 @@ interface IState {
 
 class EditMessageComposer extends React.Component<IEditMessageComposerProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private readonly editorRef = createRef<BasicMessageComposer>();
     private readonly dispatcherRef: string;
@@ -138,7 +138,6 @@ class EditMessageComposer extends React.Component<IEditMessageComposerProps, ISt
 
     public constructor(props: IEditMessageComposerProps, context: React.ContextType<typeof RoomContext>) {
         super(props, context);
-        this.context = context; // otherwise React will only set it prior to render due to type def above
 
         const isRestored = this.createEditorModel();
         const ev = this.props.editState.getEvent();

src/components/views/rooms/EventTile.tsx

@@ -297,7 +297,7 @@ export class UnwrappedEventTile extends React.Component<EventTileProps, IState>
     };
 
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private unmounted = false;
 

src/components/views/rooms/LegacyRoomHeader.tsx

@@ -493,7 +493,7 @@ export default class RoomHeader extends React.Component<IProps, IState> {
     };
 
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
     private readonly client = this.props.room.client;
     private readonly featureAskToJoinWatcher: string;
 

src/components/views/rooms/MemberList.tsx

@@ -82,7 +82,7 @@ export default class MemberList extends React.Component<IProps, IState> {
     private mounted = false;
 
     public static contextType = SDKContext;
-    public context!: React.ContextType<typeof SDKContext>;
+    public declare context: React.ContextType<typeof SDKContext>;
     private tiles: Map<string, MemberTile> = new Map();
 
     public constructor(props: IProps, context: React.ContextType<typeof SDKContext>) {

src/components/views/rooms/MessageComposer.tsx

@@ -119,7 +119,7 @@ export class MessageComposer extends React.Component<IProps, IState> {
     private _voiceRecording: Optional<VoiceMessageRecording>;
 
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public static defaultProps = {
         compact: false,

src/components/views/rooms/MessageComposerButtons.tsx

@@ -298,7 +298,7 @@ interface IPollButtonProps {
 
 class PollButton extends React.PureComponent<IPollButtonProps> {
     public static contextType = OverflowMenuContext;
-    public context!: React.ContextType<typeof OverflowMenuContext>;
+    public declare context: React.ContextType<typeof OverflowMenuContext>;
 
     private onCreateClick = (): void => {
         this.context?.(); // close overflow menu

src/components/views/rooms/PinnedEventTile.tsx

@@ -40,7 +40,7 @@ const AVATAR_SIZE = "24px";
 
 export default class PinnedEventTile extends React.Component<IProps> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     private onTileClicked = (): void => {
         dis.dispatch<ViewRoomPayload>({

src/components/views/rooms/ReplyPreview.tsx

@@ -39,7 +39,7 @@ interface IProps {
 
 export default class ReplyPreview extends React.Component<IProps> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     public render(): JSX.Element | null {
         if (!this.props.replyToEvent) return null;

src/components/views/rooms/RoomList.tsx

@@ -432,7 +432,7 @@ export default class RoomList extends React.PureComponent<IProps, IState> {
     private treeRef = createRef<HTMLDivElement>();
 
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/views/rooms/RoomUpgradeWarningBar.tsx

@@ -33,7 +33,7 @@ interface IState {
 
 export default class RoomUpgradeWarningBar extends React.PureComponent<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/views/rooms/SearchResultTile.tsx

@@ -44,7 +44,7 @@ interface IProps {
 
 export default class SearchResultTile extends React.Component<IProps> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     // A map of <callId, LegacyCallEventGrouper>
     private callEventGroupers = new Map<string, LegacyCallEventGrouper>();

src/components/views/rooms/SendMessageComposer.tsx

@@ -254,7 +254,7 @@ interface ISendMessageComposerProps extends MatrixClientProps {
 
 export class SendMessageComposer extends React.Component<ISendMessageComposerProps> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
 
     private readonly prepareToEncrypt?: DebouncedFunc<() => void>;
     private readonly editorRef = createRef<BasicMessageComposer>();
@@ -269,7 +269,6 @@ export class SendMessageComposer extends React.Component<ISendMessageComposerPro
 
     public constructor(props: ISendMessageComposerProps, context: React.ContextType<typeof RoomContext>) {
         super(props, context);
-        this.context = context; // otherwise React will only set it prior to render due to type def above
 
         if (this.props.mxClient.isCryptoEnabled() && this.props.mxClient.isRoomEncrypted(this.props.room.roomId)) {
             this.prepareToEncrypt = throttle(

src/components/views/rooms/VoiceRecordComposerTile.tsx

@@ -63,7 +63,7 @@ interface IState {
  */
 export default class VoiceRecordComposerTile extends React.PureComponent<IProps, IState> {
     public static contextType = RoomContext;
-    public context!: React.ContextType<typeof RoomContext>;
+    public declare context: React.ContextType<typeof RoomContext>;
     private voiceRecordingId: string;
 
     public constructor(props: IProps, context: React.ContextType<typeof RoomContext>) {

src/components/views/settings/tabs/room/BridgeSettingsTab.tsx

@@ -36,7 +36,7 @@ interface IProps {
 
 export default class BridgeSettingsTab extends React.Component<IProps> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     private renderBridgeCard(event: MatrixEvent, room: Room | null): ReactNode {
         const content = event.getContent();

src/components/views/settings/tabs/room/GeneralRoomSettingsTab.tsx

@@ -42,7 +42,7 @@ interface IState {
 
 export default class GeneralRoomSettingsTab extends React.Component<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: ContextType<typeof MatrixClientContext>;
+    public declare context: ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/views/settings/tabs/room/NotificationSettingsTab.tsx

@@ -50,7 +50,7 @@ export default class NotificationsSettingsTab extends React.Component<IProps, IS
     private soundUpload = createRef<HTMLInputElement>();
 
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/views/settings/tabs/room/RolesRoomSettingsTab.tsx

@@ -89,7 +89,7 @@ interface IBannedUserProps {
 
 export class BannedUser extends React.Component<IBannedUserProps> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     private onUnbanClick = (): void => {
         this.context.unban(this.props.member.roomId, this.props.member.userId).catch((err) => {
@@ -137,7 +137,7 @@ interface IProps {
 
 export default class RolesRoomSettingsTab extends React.Component<IProps> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public componentDidMount(): void {
         this.context.on(RoomStateEvent.Update, this.onRoomStateUpdate);

src/components/views/settings/tabs/room/SecurityRoomSettingsTab.tsx

@@ -67,7 +67,7 @@ interface IState {
 
 export default class SecurityRoomSettingsTab extends React.Component<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/views/settings/tabs/user/HelpUserSettingsTab.tsx

@@ -40,7 +40,7 @@ interface IState {
 
 export default class HelpUserSettingsTab extends React.Component<IProps, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: IProps, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/components/views/settings/tabs/user/VoiceUserSettingsTab.tsx

@@ -59,7 +59,7 @@ const mapDeviceKindToHandlerValue = (deviceKind: MediaDeviceKindEnum): string |
 
 export default class VoiceUserSettingsTab extends React.Component<{}, IState> {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public constructor(props: {}, context: React.ContextType<typeof MatrixClientContext>) {
         super(props, context);

src/models/Call.ts

@@ -126,8 +126,8 @@ interface CallEventHandlerMap {
  * A group call accessed through a widget.
  */
 export abstract class Call extends TypedEventEmitter<CallEvent, CallEventHandlerMap> {
-    protected readonly widgetUid = WidgetUtils.getWidgetUid(this.widget);
+    protected readonly widgetUid: string;
-    protected readonly room = this.client.getRoom(this.roomId)!;
+    protected readonly room: Room;
 
     /**
      * The time after which device member state should be considered expired.
@@ -184,6 +184,8 @@ export abstract class Call extends TypedEventEmitter<CallEvent, CallEventHandler
         protected readonly client: MatrixClient,
     ) {
         super();
+        this.widgetUid = WidgetUtils.getWidgetUid(this.widget);
+        this.room = this.client.getRoom(this.roomId)!;
     }
 
     /**

src/stores/room-list/previews/PollStartEventPreview.ts

@@ -26,7 +26,7 @@ import MatrixClientContext from "../../../contexts/MatrixClientContext";
 
 export class PollStartEventPreview implements IPreview {
     public static contextType = MatrixClientContext;
-    public context!: React.ContextType<typeof MatrixClientContext>;
+    public declare context: React.ContextType<typeof MatrixClientContext>;
 
     public getTextFor(event: MatrixEvent, tagId?: TagID, isThread?: boolean): string | null {
         let eventContent = event.getContent();

src/utils/MegolmExportEncryption.ts

@@ -20,7 +20,7 @@ import { logger } from "matrix-js-sdk/src/logger";
 import { _t } from "../languageHandler";
 import SdkConfig from "../SdkConfig";
 
-const subtleCrypto = window.crypto.subtle || window.crypto.webkitSubtle;
+const subtleCrypto = window.crypto.subtle;
 
 /**
  * Make an Error object which has a friendlyText property which is already

test/TestSdkContext.ts

@@ -35,18 +35,18 @@ import {
  * replace individual stores. This is useful for tests which need to mock out stores.
  */
 export class TestSdkContext extends SdkContextClass {
-    public _RightPanelStore?: RightPanelStore;
+    public declare _RightPanelStore?: RightPanelStore;
-    public _RoomNotificationStateStore?: RoomNotificationStateStore;
+    public declare _RoomNotificationStateStore?: RoomNotificationStateStore;
-    public _RoomViewStore?: RoomViewStore;
+    public declare _RoomViewStore?: RoomViewStore;
-    public _WidgetPermissionStore?: WidgetPermissionStore;
+    public declare _WidgetPermissionStore?: WidgetPermissionStore;
-    public _WidgetLayoutStore?: WidgetLayoutStore;
+    public declare _WidgetLayoutStore?: WidgetLayoutStore;
-    public _WidgetStore?: WidgetStore;
+    public declare _WidgetStore?: WidgetStore;
-    public _PosthogAnalytics?: PosthogAnalytics;
+    public declare _PosthogAnalytics?: PosthogAnalytics;
-    public _SlidingSyncManager?: SlidingSyncManager;
+    public declare _SlidingSyncManager?: SlidingSyncManager;
-    public _SpaceStore?: SpaceStoreClass;
+    public declare _SpaceStore?: SpaceStoreClass;
-    public _VoiceBroadcastRecordingsStore?: VoiceBroadcastRecordingsStore;
+    public declare _VoiceBroadcastRecordingsStore?: VoiceBroadcastRecordingsStore;
-    public _VoiceBroadcastPreRecordingStore?: VoiceBroadcastPreRecordingStore;
+    public declare _VoiceBroadcastPreRecordingStore?: VoiceBroadcastPreRecordingStore;
-    public _VoiceBroadcastPlaybacksStore?: VoiceBroadcastPlaybacksStore;
+    public declare _VoiceBroadcastPlaybacksStore?: VoiceBroadcastPlaybacksStore;
 
     constructor() {
         super();

test/test-utils/call.ts

@@ -43,6 +43,7 @@ export class MockedCall extends Call {
             },
             room.client,
         );
+        this.groupCall = { creationTs: this.event.getTs() } as unknown as GroupCall;
     }
 
     public static get(room: Room): MockedCall | null {
@@ -67,7 +68,7 @@ export class MockedCall extends Call {
         CallStore.instance.updateRoom(room);
     }
 
-    public readonly groupCall = { creationTs: this.event.getTs() } as unknown as GroupCall;
+    public readonly groupCall: GroupCall;
 
     public get participants(): Map<RoomMember, Set<string>> {
         return super.participants;

tsconfig.json

@@ -4,9 +4,10 @@
         "emitDecoratorMetadata": false,
         "resolveJsonModule": true,
         "esModuleInterop": true,
+        "useDefineForClassFields": true,
         "module": "es2022",
         "moduleResolution": "node",
-        "target": "es2018",
+        "target": "es2022",
         "noUnusedLocals": true,
         "sourceMap": false,
         "outDir": "./lib",