diff --git a/src/components/views/dialogs/SpaceSettingsDialog.tsx b/src/components/views/dialogs/SpaceSettingsDialog.tsx
index 1273f06401..5e0cd96740 100644
--- a/src/components/views/dialogs/SpaceSettingsDialog.tsx
+++ b/src/components/views/dialogs/SpaceSettingsDialog.tsx
@@ -27,7 +27,7 @@ import TabbedView, { Tab } from "../../structures/TabbedView";
 import SpaceSettingsGeneralTab from '../spaces/SpaceSettingsGeneralTab';
 import SpaceSettingsVisibilityTab from "../spaces/SpaceSettingsVisibilityTab";
 import SettingsStore from "../../../settings/SettingsStore";
-import {UIFeature} from "../../../settings/UIFeature";
+import { UIFeature } from "../../../settings/UIFeature";
 import AdvancedRoomSettingsTab from "../settings/tabs/room/AdvancedRoomSettingsTab";
 
 export enum SpaceSettingsTab {
@@ -91,4 +91,3 @@ const SpaceSettingsDialog: React.FC<IProps> = ({ matrixClient: cli, space, onFin
 };
 
 export default SpaceSettingsDialog;
-
diff --git a/src/components/views/elements/LabelledToggleSwitch.tsx b/src/components/views/elements/LabelledToggleSwitch.tsx
index 957e3dbc97..d97b698fd8 100644
--- a/src/components/views/elements/LabelledToggleSwitch.tsx
+++ b/src/components/views/elements/LabelledToggleSwitch.tsx
@@ -1,5 +1,5 @@
 /*
-Copyright 2019, 2021 The Matrix.org Foundation C.I.C.
+Copyright 2019 - 2021 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.
diff --git a/src/components/views/elements/RoomAliasField.tsx b/src/components/views/elements/RoomAliasField.tsx
index 7eff529c46..74af311b47 100644
--- a/src/components/views/elements/RoomAliasField.tsx
+++ b/src/components/views/elements/RoomAliasField.tsx
@@ -1,5 +1,5 @@
 /*
-Copyright 2019, 2021 The Matrix.org Foundation C.I.C.
+Copyright 2019 - 2021 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.
@@ -39,9 +39,13 @@ interface IState {
 export default class RoomAliasField extends React.PureComponent<IProps, IState> {
     private fieldRef = createRef<Field>();
 
-    public state = {
-        isValid: true,
-    };
+    constructor(props, context) {
+        super(props, context);
+
+        this.state = {
+            isValid: true,
+        };
+    }
 
     private asFullAlias(localpart: string): string {
         return `#${localpart}:${this.props.domain}`;
@@ -123,15 +127,15 @@ export default class RoomAliasField extends React.PureComponent<IProps, IState>
         ],
     });
 
-    get isValid() {
+    public get isValid() {
         return this.state.isValid;
     }
 
-    validate(options: IValidateOpts) {
+    public validate(options: IValidateOpts) {
         return this.fieldRef.current?.validate(options);
     }
 
-    focus() {
+    public focus() {
         this.fieldRef.current?.focus();
     }
 }
diff --git a/src/components/views/room_settings/RoomPublishSetting.tsx b/src/components/views/room_settings/RoomPublishSetting.tsx
index 24df5f1c84..95b0ac100d 100644
--- a/src/components/views/room_settings/RoomPublishSetting.tsx
+++ b/src/components/views/room_settings/RoomPublishSetting.tsx
@@ -1,5 +1,5 @@
 /*
-Copyright 2020, 2021 The Matrix.org Foundation C.I.C.
+Copyright 2020 - 2021 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.
@@ -33,9 +33,13 @@ interface IState {
 
 @replaceableComponent("views.room_settings.RoomPublishSetting")
 export default class RoomPublishSetting extends React.PureComponent<IProps, IState> {
-    public state = {
-        isRoomPublished: false,
-    };
+    constructor(props, context) {
+        super(props, context);
+
+        this.state = {
+            isRoomPublished: false,
+        };
+    }
 
     private onRoomPublishChange = (e) => {
         const valueBefore = this.state.isRoomPublished;
@@ -67,7 +71,7 @@ export default class RoomPublishSetting extends React.PureComponent<IProps, ISta
                 onChange={this.onRoomPublishChange}
                 disabled={!this.props.canSetCanonicalAlias}
                 label={_t("Publish this room to the public in %(domain)s's room directory?", {
-                  domain: client.getDomain(),
+                    domain: client.getDomain(),
                 })}
             />
         );
diff --git a/src/components/views/settings/tabs/room/AdvancedRoomSettingsTab.tsx b/src/components/views/settings/tabs/room/AdvancedRoomSettingsTab.tsx
index 7e7d9cba90..c4963d0154 100644
--- a/src/components/views/settings/tabs/room/AdvancedRoomSettingsTab.tsx
+++ b/src/components/views/settings/tabs/room/AdvancedRoomSettingsTab.tsx
@@ -1,5 +1,5 @@
 /*
-Copyright 2019, 2021 The Matrix.org Foundation C.I.C.
+Copyright 2019 - 2021 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.
@@ -15,6 +15,7 @@ limitations under the License.
 */
 
 import React from 'react';
+import { EventType } from 'matrix-js-sdk/src/@types/event';
 
 import { _t } from "../../../../../languageHandler";
 import { MatrixClientPeg } from "../../../../../MatrixClientPeg";
@@ -56,10 +57,10 @@ export default class AdvancedRoomSettingsTab extends React.Component<IProps, ISt
         // we handle lack of this object gracefully later, so don't worry about it failing here.
         const room = MatrixClientPeg.get().getRoom(this.props.roomId);
         room.getRecommendedVersion().then((v) => {
-            const tombstone = room.currentState.getStateEvents("m.room.tombstone", "");
+            const tombstone = room.currentState.getStateEvents(EventType.RoomTombstone, "");
 
             const additionalStateChanges: Partial<IState> = {};
-            const createEvent = room.currentState.getStateEvents("m.room.create", "");
+            const createEvent = room.currentState.getStateEvents(EventType.RoomCreate, "");
             const predecessor = createEvent ? createEvent.getContent().predecessor : null;
             if (predecessor && predecessor.room_id) {
                 additionalStateChanges.oldRoomId = predecessor.room_id;
@@ -100,9 +101,9 @@ export default class AdvancedRoomSettingsTab extends React.Component<IProps, ISt
         const room = client.getRoom(this.props.roomId);
 
         let unfederatableSection;
-        const createEvent = room.currentState.getStateEvents('m.room.create', '');
+        const createEvent = room.currentState.getStateEvents(EventType.RoomCreate, '');
         if (createEvent && createEvent.getContent()['m.federate'] === false) {
-            unfederatableSection = <div>{_t('This room is not accessible by remote Matrix servers')}</div>;
+            unfederatableSection = <div>{ _t('This room is not accessible by remote Matrix servers') }</div>;
         }
 
         let roomUpgradeButton;
@@ -110,7 +111,7 @@ export default class AdvancedRoomSettingsTab extends React.Component<IProps, ISt
             roomUpgradeButton = (
                 <div>
                     <p className='mx_SettingsTab_warningText'>
-                        {_t(
+                        { _t(
                             "<b>Warning</b>: Upgrading a room will <i>not automatically migrate room members " +
                             "to the new version of the room.</i> We'll post a link to the new room in the old " +
                             "version of the room - room members will have to click this link to join the new room.",
@@ -118,10 +119,10 @@ export default class AdvancedRoomSettingsTab extends React.Component<IProps, ISt
                                 "b": (sub) => <b>{sub}</b>,
                                 "i": (sub) => <i>{sub}</i>,
                             },
-                        )}
+                        ) }
                     </p>
                     <AccessibleButton onClick={this.upgradeRoom} kind='primary'>
-                        {_t("Upgrade this room to the recommended room version")}
+                        { _t("Upgrade this room to the recommended room version") }
                     </AccessibleButton>
                 </div>
             );
@@ -141,21 +142,21 @@ export default class AdvancedRoomSettingsTab extends React.Component<IProps, ISt
 
         return (
             <div className="mx_SettingsTab">
-                <div className="mx_SettingsTab_heading">{_t("Advanced")}</div>
+                <div className="mx_SettingsTab_heading">{ _t("Advanced") }</div>
                 <div className='mx_SettingsTab_section mx_SettingsTab_subsectionText'>
                     <span className='mx_SettingsTab_subheading'>
                         { room?.isSpaceRoom() ? _t("Space information") : _t("Room information") }
                     </span>
                     <div>
-                        <span>{_t("Internal room ID:")}</span>&nbsp;
+                        <span>{ _t("Internal room ID:") }</span>&nbsp;
                         { this.props.roomId }
                     </div>
                     { unfederatableSection }
                 </div>
                 <div className='mx_SettingsTab_section mx_SettingsTab_subsectionText'>
-                    <span className='mx_SettingsTab_subheading'>{_t("Room version")}</span>
+                    <span className='mx_SettingsTab_subheading'>{ _t("Room version") }</span>
                     <div>
-                        <span>{_t("Room version:")}</span>&nbsp;
+                        <span>{ _t("Room version:") }</span>&nbsp;
                         { room.getVersion() }
                     </div>
                     { oldRoomLink }
diff --git a/src/components/views/spaces/SpaceSettingsGeneralTab.tsx b/src/components/views/spaces/SpaceSettingsGeneralTab.tsx
index db0a180846..3afdc629e4 100644
--- a/src/components/views/spaces/SpaceSettingsGeneralTab.tsx
+++ b/src/components/views/spaces/SpaceSettingsGeneralTab.tsx
@@ -90,7 +90,7 @@ const SpaceSettingsGeneralTab = ({ matrixClient: cli, space, onFinished }: IProp
     };
 
     return <div className="mx_SettingsTab">
-        <div className="mx_SettingsTab_heading">{_t("General")}</div>
+        <div className="mx_SettingsTab_heading">{ _t("General") }</div>
 
         <div>{ _t("Edit settings relating to your space.") }</div>
 
diff --git a/src/components/views/spaces/SpaceSettingsVisibilityTab.tsx b/src/components/views/spaces/SpaceSettingsVisibilityTab.tsx
index 2f80ad97a6..263823603b 100644
--- a/src/components/views/spaces/SpaceSettingsVisibilityTab.tsx
+++ b/src/components/views/spaces/SpaceSettingsVisibilityTab.tsx
@@ -137,7 +137,7 @@ const SpaceSettingsVisibilityTab = ({ matrixClient: cli, space }: IProps) => {
     }
 
     return <div className="mx_SettingsTab">
-        <div className="mx_SettingsTab_heading">{_t("Visibility")}</div>
+        <div className="mx_SettingsTab_heading">{ _t("Visibility") }</div>
 
         { error && <div className="mx_SpaceRoomView_errorText">{ error }</div> }