Improve code-splitting of highlight.js and maplibre-gs libs

src/components/views/beacon/BeaconMarker.tsx

@@ -20,7 +20,7 @@ import { Beacon, BeaconEvent, LocationAssetType } from "matrix-js-sdk/src/matrix
 
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import { useEventEmitterState } from "../../../hooks/useEventEmitter";
-import SmartMarker from "../location/SmartMarker";
+import { SmartMarker } from "../location";
 
 interface Props {
     map: maplibregl.Map;

src/components/views/beacon/BeaconViewDialog.tsx

@@ -36,7 +36,7 @@ import MapFallback from "../location/MapFallback";
 import { MapError } from "../location/MapError";
 import { LocationShareError } from "../../../utils/location";
 
-interface IProps {
+export interface IProps {
     roomId: Room["roomId"];
     matrixClient: MatrixClient;
     // open the map centered on this beacon's location

src/components/views/beacon/index.tsx

@@ -0,0 +1,31 @@
+/*
+Copyright 2024 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Exports beacon components which touch maplibre-gs wrapped in React Suspense to enable code splitting
+
+import React, { ComponentProps, lazy, Suspense } from "react";
+
+import Spinner from "../elements/Spinner";
+
+const BeaconViewDialogComponent = lazy(() => import("./BeaconViewDialog"));
+
+export function BeaconViewDialog(props: ComponentProps<typeof BeaconViewDialogComponent>): JSX.Element {
+    return (
+        <Suspense fallback={<Spinner />}>
+            <BeaconViewDialogComponent {...props} />
+        </Suspense>
+    );
+}

src/components/views/elements/SyntaxHighlight.tsx

@@ -16,22 +16,23 @@ limitations under the License.
 */
 
 import React from "react";
-import hljs from "highlight.js";
 
-interface IProps {
+import { useAsyncMemo } from "../../../hooks/useAsyncMemo";
+
+interface Props {
     language?: string;
     children: string;
 }
 
-export default class SyntaxHighlight extends React.PureComponent<IProps> {
-    public render(): React.ReactNode {
-        const { children: content, language } = this.props;
-        const highlighted = language ? hljs.highlight(content, { language }) : hljs.highlightAuto(content);
-
-        return (
-            <pre className={`mx_SyntaxHighlight hljs language-${highlighted.language}`}>
-                <code dangerouslySetInnerHTML={{ __html: highlighted.value }} />
-            </pre>
-        );
-    }
+export default function SyntaxHighlight({ children, language }: Props): JSX.Element {
+    const highlighted = useAsyncMemo(async () => {
+        const { default: highlight } = await import("highlight.js");
+        return language ? highlight.highlight(children, { language }) : highlight.highlightAuto(children);
+    }, [language, children]);
+
+    return (
+        <pre className={`mx_SyntaxHighlight hljs language-${highlighted?.language}`}>
+            {highlighted ? <code dangerouslySetInnerHTML={{ __html: highlighted.value }} /> : children}
+        </pre>
+    );
 }

src/components/views/location/LocationButton.tsx

@@ -24,7 +24,7 @@ import { aboveLeftOf, useContextMenu, MenuProps } from "../../structures/Context
 import { OverflowMenuContext } from "../rooms/MessageComposerButtons";
 import LocationShareMenu from "./LocationShareMenu";
 
-interface IProps {
+export interface IProps {
     roomId: string;
     sender: RoomMember;
     menuPosition?: MenuProps;

src/components/views/location/Map.tsx

@@ -139,7 +139,7 @@ const onGeolocateError = (e: GeolocationPositionError): void => {
     });
 };
 
-interface MapProps {
+export interface MapProps {
     id: string;
     interactive?: boolean;
     /**

src/components/views/location/SmartMarker.tsx

@@ -18,7 +18,8 @@ import React, { ReactNode, useCallback, useEffect, useState } from "react";
 import * as maplibregl from "maplibre-gl";
 import { RoomMember } from "matrix-js-sdk/src/matrix";
 
-import { createMarker, parseGeoUri } from "../../../utils/location";
+import { parseGeoUri } from "../../../utils/location";
+import { createMarker } from "../../../utils/location/map";
 import Marker from "./Marker";
 
 const useMapMarker = (
@@ -66,7 +67,7 @@ const useMapMarker = (
     };
 };
 
-interface SmartMarkerProps {
+export interface SmartMarkerProps {
     map: maplibregl.Map;
     geoUri: string;
     id?: string;

src/components/views/location/index.tsx

@@ -0,0 +1,71 @@
+/*
+Copyright 2024 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Exports location components which touch maplibre-gs wrapped in React Suspense to enable code splitting
+
+import React, { ComponentProps, lazy, Suspense } from "react";
+
+import Spinner from "../elements/Spinner";
+
+const MapComponent = lazy(() => import("./Map"));
+
+export function Map(props: ComponentProps<typeof MapComponent>): JSX.Element {
+    return (
+        <Suspense fallback={<Spinner />}>
+            <MapComponent {...props} />
+        </Suspense>
+    );
+}
+
+const LocationPickerComponent = lazy(() => import("./LocationPicker"));
+
+export function LocationPicker(props: ComponentProps<typeof LocationPickerComponent>): JSX.Element {
+    return (
+        <Suspense fallback={<Spinner />}>
+            <LocationPickerComponent {...props} />
+        </Suspense>
+    );
+}
+
+const SmartMarkerComponent = lazy(() => import("./SmartMarker"));
+
+export function SmartMarker(props: ComponentProps<typeof SmartMarkerComponent>): JSX.Element {
+    return (
+        <Suspense fallback={<Spinner />}>
+            <SmartMarkerComponent {...props} />
+        </Suspense>
+    );
+}
+
+const LocationButtonComponent = lazy(() => import("./LocationButton"));
+
+export function LocationButton(props: ComponentProps<typeof LocationButtonComponent>): JSX.Element {
+    return (
+        <Suspense fallback={<Spinner />}>
+            <LocationButtonComponent {...props} />
+        </Suspense>
+    );
+}
+
+const LocationViewDialogComponent = lazy(() => import("./LocationViewDialog"));
+
+export function LocationViewDialog(props: ComponentProps<typeof LocationViewDialogComponent>): JSX.Element {
+    return (
+        <Suspense fallback={<Spinner />}>
+            <LocationViewDialogComponent {...props} />
+        </Suspense>
+    );
+}

src/components/views/messages/MBeaconBody.tsx

@@ -38,12 +38,11 @@ import { isSelfLocation, LocationShareError } from "../../../utils/location";
 import { BeaconDisplayStatus, getBeaconDisplayStatus } from "../beacon/displayStatus";
 import BeaconStatus from "../beacon/BeaconStatus";
 import OwnBeaconStatus from "../beacon/OwnBeaconStatus";
-import Map from "../location/Map";
+import { Map, SmartMarker } from "../location";
 import { MapError } from "../location/MapError";
 import MapFallback from "../location/MapFallback";
-import SmartMarker from "../location/SmartMarker";
 import { GetRelationsForEvent } from "../rooms/EventTile";
-import BeaconViewDialog from "../beacon/BeaconViewDialog";
+import { BeaconViewDialog } from "../beacon";
 import { IBodyProps } from "./IBodyProps";
 
 const useBeaconState = (

src/components/views/messages/MLocationBody.tsx

@@ -29,9 +29,7 @@ import {
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import TooltipTarget from "../elements/TooltipTarget";
 import { Alignment } from "../elements/Tooltip";
-import LocationViewDialog from "../location/LocationViewDialog";
-import Map from "../location/Map";
-import SmartMarker from "../location/SmartMarker";
+import { SmartMarker, Map, LocationViewDialog } from "../location";
 import { IBodyProps } from "./IBodyProps";
 import { createReconnectedListener } from "../../../utils/connection";
 

src/components/views/messages/TextualBody.tsx

@@ -16,7 +16,6 @@ limitations under the License.
 
 import React, { createRef, SyntheticEvent, MouseEvent } from "react";
 import ReactDOM from "react-dom";
-import highlight from "highlight.js";
 import { MsgType } from "matrix-js-sdk/src/matrix";
 import { TooltipProvider } from "@vector-im/compound-web";
 
@@ -238,7 +237,9 @@ export default class TextualBody extends React.Component<IBodyProps, IState> {
         pre.append(document.createElement("span"));
     }
 
-    private highlightCode(code: HTMLElement): void {
+    private async highlightCode(code: HTMLElement): Promise<void> {
+        const { default: highlight } = await import("highlight.js");
+
         if (code.textContent && code.textContent.length > MAX_HIGHLIGHT_LENGTH) {
             console.log(
                 "Code block is bigger than highlight limit (" +

src/components/views/rooms/MessageComposerButtons.tsx

@@ -24,7 +24,7 @@ import { CollapsibleButton } from "./CollapsibleButton";
 import { MenuProps } from "../../structures/ContextMenu";
 import dis from "../../../dispatcher/dispatcher";
 import ErrorDialog from "../dialogs/ErrorDialog";
-import LocationButton from "../location/LocationButton";
+import { LocationButton } from "../location";
 import Modal from "../../../Modal";
 import PollCreateDialog from "../elements/PollCreateDialog";
 import { MatrixClientPeg } from "../../../MatrixClientPeg";

src/utils/location/index.ts

@@ -18,6 +18,6 @@ export * from "./findMapStyleUrl";
 export * from "./isSelfLocation";
 export * from "./locationEventGeoUri";
 export * from "./LocationShareErrors";
-export * from "./map";
+export * from "./links";
 export * from "./parseGeoUri";
 export * from "./positionFailureMessage";

src/utils/location/links.ts

@@ -0,0 +1,47 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { MatrixEvent, M_LOCATION } from "matrix-js-sdk/src/matrix";
+
+import { parseGeoUri } from "./parseGeoUri";
+
+export const makeMapSiteLink = (coords: GeolocationCoordinates): string => {
+    return (
+        "https://www.openstreetmap.org/" +
+        `?mlat=${coords.latitude}` +
+        `&mlon=${coords.longitude}` +
+        `#map=16/${coords.latitude}/${coords.longitude}`
+    );
+};
+
+export const createMapSiteLinkFromEvent = (event: MatrixEvent): string | null => {
+    const content = event.getContent();
+    const mLocation = content[M_LOCATION.name];
+    if (mLocation !== undefined) {
+        const uri = mLocation["uri"];
+        if (uri !== undefined) {
+            const geoCoords = parseGeoUri(uri);
+            return geoCoords ? makeMapSiteLink(geoCoords) : null;
+        }
+    } else {
+        const geoUri = content["geo_uri"];
+        if (geoUri) {
+            const geoCoords = parseGeoUri(geoUri);
+            return geoCoords ? makeMapSiteLink(geoCoords) : null;
+        }
+    }
+    return null;
+};

src/utils/location/map.ts

@@ -15,11 +15,10 @@ limitations under the License.
 */
 
 import * as maplibregl from "maplibre-gl";
-import { MatrixClient, MatrixEvent, M_LOCATION } from "matrix-js-sdk/src/matrix";
+import { MatrixClient } from "matrix-js-sdk/src/matrix";
 import { logger } from "matrix-js-sdk/src/logger";
 
 import { _t } from "../../languageHandler";
-import { parseGeoUri } from "./parseGeoUri";
 import { findMapStyleUrl } from "./findMapStyleUrl";
 import { LocationShareError } from "./LocationShareErrors";
 
@@ -75,31 +74,3 @@ export const createMarker = (coords: GeolocationCoordinates, element: HTMLElemen
     }).setLngLat({ lon: coords.longitude, lat: coords.latitude });
     return marker;
 };
-
-export const makeMapSiteLink = (coords: GeolocationCoordinates): string => {
-    return (
-        "https://www.openstreetmap.org/" +
-        `?mlat=${coords.latitude}` +
-        `&mlon=${coords.longitude}` +
-        `#map=16/${coords.latitude}/${coords.longitude}`
-    );
-};
-
-export const createMapSiteLinkFromEvent = (event: MatrixEvent): string | null => {
-    const content = event.getContent();
-    const mLocation = content[M_LOCATION.name];
-    if (mLocation !== undefined) {
-        const uri = mLocation["uri"];
-        if (uri !== undefined) {
-            const geoCoords = parseGeoUri(uri);
-            return geoCoords ? makeMapSiteLink(geoCoords) : null;
-        }
-    } else {
-        const geoUri = content["geo_uri"];
-        if (geoUri) {
-            const geoCoords = parseGeoUri(geoUri);
-            return geoCoords ? makeMapSiteLink(geoCoords) : null;
-        }
-    }
-    return null;
-};

src/utils/location/useMap.ts

@@ -15,8 +15,8 @@ limitations under the License.
 */
 
 import { useEffect, useState } from "react";
-import { Map as MapLibreMap } from "maplibre-gl";
 
+import type { Map as MapLibreMap } from "maplibre-gl";
 import { createMap } from "./map";
 import { useMatrixClientContext } from "../../contexts/MatrixClientContext";
 

test/components/views/elements/SyntaxHighlight-test.tsx

@@ -15,22 +15,24 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { render } from "@testing-library/react";
+import { render, waitFor } from "@testing-library/react";
 import hljs, { type HighlightOptions } from "highlight.js";
 import React from "react";
 
 import SyntaxHighlight from "../../../../src/components/views/elements/SyntaxHighlight";
 
 describe("<SyntaxHighlight />", () => {
-    it("renders", () => {
+    it("renders", async () => {
         const { container } = render(<SyntaxHighlight>console.log("Hello, World!");</SyntaxHighlight>);
+        await waitFor(() => expect(container.querySelector(".language-arcade")).toBeTruthy());
         expect(container).toMatchSnapshot();
     });
 
-    it.each(["json", "javascript", "css"])("uses the provided language", (lang) => {
+    it.each(["json", "javascript", "css"])("uses the provided language", async (lang) => {
         const mock = jest.spyOn(hljs, "highlight");
 
-        render(<SyntaxHighlight language={lang}>// Hello, World</SyntaxHighlight>);
+        const { container } = render(<SyntaxHighlight language={lang}>// Hello, World</SyntaxHighlight>);
+        await waitFor(() => expect(container.querySelector(`.language-${lang}`)).toBeTruthy());
 
         const [_lang, opts] = mock.mock.lastCall!;
         expect((opts as HighlightOptions)["language"]).toBe(lang);