Merge branch 'develop' into pag-back

2023-07-14 07:21:05 +00:00 · 2023-07-14 07:21:05 +00:00 · 2a434c63df
parent a1b90d6dd3 2b6dbd4fcb
commit 2a434c63df
54 changed files with 352 additions and 341 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -27,6 +27,7 @@
 - フォルダーやファイルに対しても開発者モード使用時、IDをコピーできるように
 - 引用対象を「もっと見る」で展開した場合、「閉じる」で畳めるように
 - プロフィールURLをコピーできるボタンを追加 #11190
+- `CURRENT_URL`で現在表示中のURLを取得できるように(AiScript)
 - ユーザーのContextMenuに「アンテナに追加」ボタンを追加
 - フォローやお気に入り登録をしていないチャンネルを開く時は概要ページを開くように
 - 画面ビューワをタップした場合、マウスクリックと同様に画像ビューワを閉じるように
--- a/packages/backend/src/boot/master.ts
+++ b/packages/backend/src/boot/master.ts
@ -31,7 +31,7 @@ function greet() {
 		console.log(themeColor(' |     |_|___ ___| |_ ___ _ _ '));
 		console.log(themeColor(' | | | | |_ -|_ -| \'_| -_| | |'));
 		console.log(themeColor(' |_|_|_|_|___|___|_,_|___|_  |'));
-		console.log(' ' + chalk.gray(v) + themeColor('                        |___|\n'.substr(v.length)));
+		console.log(' ' + chalk.gray(v) + themeColor('                        |___|\n'.substring(v.length)));
 		//#endregion

 		console.log(' Misskey is an open-source decentralized microblogging platform.');
--- a/packages/backend/src/core/activitypub/ApAudienceService.ts
+++ b/packages/backend/src/core/activitypub/ApAudienceService.ts
@ -16,6 +16,8 @@ type AudienceInfo = {
 	visibleUsers: User[],
 };

+type GroupedAudience = Record<'public' | 'followers' | 'other', string[]>;
+
@Injectable()
 export class ApAudienceService {
 	constructor(
@ -67,11 +69,11 @@ export class ApAudienceService {
 	}

 	@bindThis
-	private groupingAudience(ids: string[], actor: RemoteUser) {
-		const groups = {
-			public: [] as string[],
-			followers: [] as string[],
-			other: [] as string[],
+	private groupingAudience(ids: string[], actor: RemoteUser): GroupedAudience {
+		const groups: GroupedAudience = {
+			public: [],
+			followers: [],
+			other: [],
 		};

 		for (const id of ids) {
@ -90,7 +92,7 @@ export class ApAudienceService {
 	}

 	@bindThis
-	private isPublic(id: string) {
+	private isPublic(id: string): boolean {
 		return [
 			'https://www.w3.org/ns/activitystreams#Public',
 			'as#Public',
@ -99,9 +101,7 @@ export class ApAudienceService {
 	}

 	@bindThis
-	private isFollowers(id: string, actor: RemoteUser) {
-		return (
-			id === (actor.followersUri ?? `${actor.uri}/followers`)
-		);
+	private isFollowers(id: string, actor: RemoteUser): boolean {
+		return id === (actor.followersUri ?? `${actor.uri}/followers`);
 	}
 }
--- a/packages/backend/src/core/activitypub/ApDbResolverService.ts
+++ b/packages/backend/src/core/activitypub/ApDbResolverService.ts
@ -99,13 +99,15 @@ export class ApDbResolverService implements OnApplicationShutdown {
 		if (parsed.local) {
 			if (parsed.type !== 'users') return null;

-			return await this.cacheService.userByIdCache.fetchMaybe(parsed.id, () => this.usersRepository.findOneBy({
-				id: parsed.id,
-			}).then(x => x ?? undefined)) as LocalUser | undefined ?? null;
+			return await this.cacheService.userByIdCache.fetchMaybe(
+				parsed.id,
+				() => this.usersRepository.findOneBy({ id: parsed.id }).then(x => x ?? undefined),
+			) as LocalUser | undefined ?? null;
 		} else {
-			return await this.cacheService.uriPersonCache.fetch(parsed.uri, () => this.usersRepository.findOneBy({
-				uri: parsed.uri,
-			})) as RemoteUser | null;
+			return await this.cacheService.uriPersonCache.fetch(
+				parsed.uri,
+				() => this.usersRepository.findOneBy({ uri: parsed.uri }),
+			) as RemoteUser | null;
 		}
 	}

@ -145,9 +147,11 @@ export class ApDbResolverService implements OnApplicationShutdown {
 	} | null> {
 		const user = await this.apPersonService.resolvePerson(uri) as RemoteUser;

-		if (user == null) return null;
-
-		const key = await this.publicKeyByUserIdCache.fetch(user.id, () => this.userPublickeysRepository.findOneBy({ userId: user.id }), v => v != null);
+		const key = await this.publicKeyByUserIdCache.fetch(
+			user.id,
+			() => this.userPublickeysRepository.findOneBy({ userId: user.id }),
+			v => v != null,
+		);

 		return {
 			user,
--- a/packages/backend/src/core/activitypub/ApDeliverManagerService.ts
+++ b/packages/backend/src/core/activitypub/ApDeliverManagerService.ts
@ -29,6 +29,121 @@ const isFollowers = (recipe: IRecipe): recipe is IFollowersRecipe =>
 const isDirect = (recipe: IRecipe): recipe is IDirectRecipe =>
 	recipe.type === 'Direct';

+class DeliverManager {
+	private actor: ThinUser;
+	private activity: IActivity | null;
+	private recipes: IRecipe[] = [];
+
+	/**
+	 * Constructor
+	 * @param userEntityService
+	 * @param followingsRepository
+	 * @param queueService
+	 * @param actor Actor
+	 * @param activity Activity to deliver
+	 */
+	constructor(
+		private userEntityService: UserEntityService,
+		private followingsRepository: FollowingsRepository,
+		private queueService: QueueService,
+
+		actor: { id: User['id']; host: null; },
+		activity: IActivity | null,
+	) {
+		// 型で弾いてはいるが一応ローカルユーザーかチェック
+		// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+		if (actor.host != null) throw new Error('actor.host must be null');
+
+		// パフォーマンス向上のためキューに突っ込むのはidのみに絞る
+		this.actor = {
+			id: actor.id,
+		};
+		this.activity = activity;
+	}
+
+	/**
+	 * Add recipe for followers deliver
+	 */
+	@bindThis
+	public addFollowersRecipe(): void {
+		const deliver: IFollowersRecipe = {
+			type: 'Followers',
+		};
+
+		this.addRecipe(deliver);
+	}
+
+	/**
+	 * Add recipe for direct deliver
+	 * @param to To
+	 */
+	@bindThis
+	public addDirectRecipe(to: RemoteUser): void {
+		const recipe: IDirectRecipe = {
+			type: 'Direct',
+			to,
+		};
+
+		this.addRecipe(recipe);
+	}
+
+	/**
+	 * Add recipe
+	 * @param recipe Recipe
+	 */
+	@bindThis
+	public addRecipe(recipe: IRecipe): void {
+		this.recipes.push(recipe);
+	}
+
+	/**
+	 * Execute delivers
+	 */
+	@bindThis
+	public async execute(): Promise<void> {
+		// The value flags whether it is shared or not.
+		// key: inbox URL, value: whether it is sharedInbox
+		const inboxes = new Map<string, boolean>();
+
+		// build inbox list
+		// Process follower recipes first to avoid duplication when processing direct recipes later.
+		if (this.recipes.some(r => isFollowers(r))) {
+			// followers deliver
+			// TODO: SELECT DISTINCT ON ("followerSharedInbox") "followerSharedInbox" みたいな問い合わせにすればよりパフォーマンス向上できそう
+			// ただ、sharedInboxがnullなリモートユーザーも稀におり、その対応ができなさそう？
+			const followers = await this.followingsRepository.find({
+				where: {
+					followeeId: this.actor.id,
+					followerHost: Not(IsNull()),
+				},
+				select: {
+					followerSharedInbox: true,
+					followerInbox: true,
+				},
+			});
+
+			for (const following of followers) {
+				const inbox = following.followerSharedInbox ?? following.followerInbox;
+				if (inbox === null) throw new Error('inbox is null');
+				inboxes.set(inbox, following.followerSharedInbox != null);
+			}
+		}
+
+		for (const recipe of this.recipes.filter(isDirect)) {
+			// check that shared inbox has not been added yet
+			if (recipe.to.sharedInbox !== null && inboxes.has(recipe.to.sharedInbox)) continue;
+
+			// check that they actually have an inbox
+			if (recipe.to.inbox === null) continue;
+
+			inboxes.set(recipe.to.inbox, false);
+		}
+
+		// deliver
+		this.queueService.deliverMany(this.actor, this.activity, inboxes);
+	}
+}
+
@Injectable()
 export class ApDeliverManagerService {
 	constructor(
@ -52,7 +167,7 @@ export class ApDeliverManagerService {
 	 * @param activity Activity
 	 */
 	@bindThis
-	public async deliverToFollowers(actor: { id: LocalUser['id']; host: null; }, activity: IActivity) {
+	public async deliverToFollowers(actor: { id: LocalUser['id']; host: null; }, activity: IActivity): Promise<void> {
 		const manager = new DeliverManager(
 			this.userEntityService,
 			this.followingsRepository,
@ -71,7 +186,7 @@ export class ApDeliverManagerService {
 	 * @param to Target user
 	 */
 	@bindThis
-	public async deliverToUser(actor: { id: LocalUser['id']; host: null; }, activity: IActivity, to: RemoteUser) {
+	public async deliverToUser(actor: { id: LocalUser['id']; host: null; }, activity: IActivity, to: RemoteUser): Promise<void> {
 		const manager = new DeliverManager(
 			this.userEntityService,
 			this.followingsRepository,
@ -84,7 +199,7 @@ export class ApDeliverManagerService {
 	}

 	@bindThis
-	public createDeliverManager(actor: { id: User['id']; host: null; }, activity: IActivity | null) {
+	public createDeliverManager(actor: { id: User['id']; host: null; }, activity: IActivity | null): DeliverManager {
 		return new DeliverManager(
 			this.userEntityService,
 			this.followingsRepository,
@ -95,123 +210,3 @@ export class ApDeliverManagerService {
 		);
 	}
 }
-
-class DeliverManager {
-	private actor: ThinUser;
-	private activity: IActivity | null;
-	private recipes: IRecipe[] = [];
-
-	/**
-	 * Constructor
-	 * @param userEntityService
-	 * @param followingsRepository
-	 * @param queueService
-	 * @param actor Actor
-	 * @param activity Activity to deliver
-	 */
-	constructor(
-		private userEntityService: UserEntityService,
-		private followingsRepository: FollowingsRepository,
-		private queueService: QueueService,
-
-		actor: { id: User['id']; host: null; },
-		activity: IActivity | null,
-	) {
-		// 型で弾いてはいるが一応ローカルユーザーかチェック
-		if (actor.host != null) throw new Error('actor.host must be null');
-
-		// パフォーマンス向上のためキューに突っ込むのはidのみに絞る
-		this.actor = {
-			id: actor.id,
-		};
-		this.activity = activity;
-	}
-
-	/**
-	 * Add recipe for followers deliver
-	 */
-	@bindThis
-	public addFollowersRecipe() {
-		const deliver = {
-			type: 'Followers',
-		} as IFollowersRecipe;
-
-		this.addRecipe(deliver);
-	}
-
-	/**
-	 * Add recipe for direct deliver
-	 * @param to To
-	 */
-	@bindThis
-	public addDirectRecipe(to: RemoteUser) {
-		const recipe = {
-			type: 'Direct',
-			to,
-		} as IDirectRecipe;
-
-		this.addRecipe(recipe);
-	}
-
-	/**
-	 * Add recipe
-	 * @param recipe Recipe
-	 */
-	@bindThis
-	public addRecipe(recipe: IRecipe) {
-		this.recipes.push(recipe);
-	}
-
-	/**
-	 * Execute delivers
-	 */
-	@bindThis
-	public async execute() {
-		// The value flags whether it is shared or not.
-		// key: inbox URL, value: whether it is sharedInbox
-		const inboxes = new Map<string, boolean>();
-
-		/*
-		build inbox list
-
-		Process follower recipes first to avoid duplication when processing
-		direct recipes later.
-		*/
-		if (this.recipes.some(r => isFollowers(r))) {
-			// followers deliver
-			// TODO: SELECT DISTINCT ON ("followerSharedInbox") "followerSharedInbox" みたいな問い合わせにすればよりパフォーマンス向上できそう
-			// ただ、sharedInboxがnullなリモートユーザーも稀におり、その対応ができなさそう？
-			const followers = await this.followingsRepository.find({
-				where: {
-					followeeId: this.actor.id,
-					followerHost: Not(IsNull()),
-				},
-				select: {
-					followerSharedInbox: true,
-					followerInbox: true,
-				},
-			}) as {
-				followerSharedInbox: string | null;
-				followerInbox: string;
-			}[];
-
-			for (const following of followers) {
-				const inbox = following.followerSharedInbox ?? following.followerInbox;
-				inboxes.set(inbox, following.followerSharedInbox != null);
-			}
-		}
-
-		this.recipes.filter((recipe): recipe is IDirectRecipe =>
-			// followers recipes have already been processed
-			isDirect(recipe)
-			// check that shared inbox has not been added yet
-			&& !(recipe.to.sharedInbox && inboxes.has(recipe.to.sharedInbox))
-			// check that they actually have an inbox
-			&& recipe.to.inbox != null,
-		)
-			.forEach(recipe => inboxes.set(recipe.to.inbox!, false));
-
-		// deliver
-		this.queueService.deliverMany(this.actor, this.activity, inboxes);
-	}
-}
--- a/packages/backend/src/core/activitypub/ApInboxService.ts
+++ b/packages/backend/src/core/activitypub/ApInboxService.ts
@ -21,10 +21,10 @@ import { CacheService } from '@/core/CacheService.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { QueueService } from '@/core/QueueService.js';
-import type { UsersRepository, NotesRepository, FollowingsRepository, AbuseUserReportsRepository, FollowRequestsRepository, } from '@/models/index.js';
+import type { UsersRepository, NotesRepository, FollowingsRepository, AbuseUserReportsRepository, FollowRequestsRepository } from '@/models/index.js';
 import { bindThis } from '@/decorators.js';
 import type { RemoteUser } from '@/models/entities/User.js';
-import { getApHrefNullable, getApId, getApIds, getApType, getOneApHrefNullable, isAccept, isActor, isAdd, isAnnounce, isBlock, isCollection, isCollectionOrOrderedCollection, isCreate, isDelete, isFlag, isFollow, isLike, isMove, isPost, isReject, isRemove, isTombstone, isUndo, isUpdate, validActor, validPost } from './type.js';
+import { getApHrefNullable, getApId, getApIds, getApType, isAccept, isActor, isAdd, isAnnounce, isBlock, isCollection, isCollectionOrOrderedCollection, isCreate, isDelete, isFlag, isFollow, isLike, isMove, isPost, isReject, isRemove, isTombstone, isUndo, isUpdate, validActor, validPost } from './type.js';
 import { ApNoteService } from './models/ApNoteService.js';
 import { ApLoggerService } from './ApLoggerService.js';
 import { ApDbResolverService } from './ApDbResolverService.js';
@ -86,7 +86,7 @@ export class ApInboxService {
 	}

 	@bindThis
-	public async performActivity(actor: RemoteUser, activity: IObject) {
+	public async performActivity(actor: RemoteUser, activity: IObject): Promise<void> {
 		if (isCollectionOrOrderedCollection(activity)) {
 			const resolver = this.apResolverService.createResolver();
 			for (const item of toArray(isCollection(activity) ? activity.items : activity.orderedItems)) {
@ -107,7 +107,7 @@ export class ApInboxService {
 		if (actor.uri) {
 			if (actor.lastFetchedAt == null || Date.now() - actor.lastFetchedAt.getTime() > 1000 * 60 * 60 * 24) {
 				setImmediate(() => {
-					this.apPersonService.updatePerson(actor.uri!);
+					this.apPersonService.updatePerson(actor.uri);
 				});
 			}
 		}
@ -229,7 +229,7 @@ export class ApInboxService {

 	@bindThis
 	private async add(actor: RemoteUser, activity: IAdd): Promise<void> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			throw new Error('invalid actor');
 		}

@ -273,7 +273,7 @@ export class ApInboxService {
 		const unlock = await this.appLockService.getApLock(uri);

 		try {
-		// 既に同じURIを持つものが登録されていないかチェック
+			// 既に同じURIを持つものが登録されていないかチェック
 			const exist = await this.apNoteService.fetchNote(uri);
 			if (exist) {
 				return;
@ -292,7 +292,7 @@ export class ApInboxService {
 						return;
 					}

-					this.logger.warn(`Error in announce target ${targetUri} - ${err.statusCode ?? err}`);
+					this.logger.warn(`Error in announce target ${targetUri} - ${err.statusCode}`);
 				}
 				throw err;
 			}
@ -409,7 +409,7 @@ export class ApInboxService {

 	@bindThis
 	private async delete(actor: RemoteUser, activity: IDelete): Promise<string> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			throw new Error('invalid actor');
 		}

@ -420,7 +420,7 @@ export class ApInboxService {
 			// typeが不明だけど、どうせ消えてるのでremote resolveしない
 			formerType = undefined;
 		} else {
-			const object = activity.object as IObject;
+			const object = activity.object;
 			if (isTombstone(object)) {
 				formerType = toSingle(object.formerType);
 			} else {
@ -503,7 +503,10 @@ export class ApInboxService {
 		// 対象ユーザーは一番最初のユーザー として あとはコメントとして格納する
 		const uris = getApIds(activity.object);

-		const userIds = uris.filter(uri => uri.startsWith(this.config.url + '/users/')).map(uri => uri.split('/').pop()!);
+		const userIds = uris
+			.filter(uri => uri.startsWith(this.config.url + '/users/'))
+			.map(uri => uri.split('/').at(-1))
+			.filter((userId): userId is string => userId !== undefined);
 		const users = await this.usersRepository.findBy({
 			id: In(userIds),
 		});
@ -566,7 +569,7 @@ export class ApInboxService {

 	@bindThis
 	private async remove(actor: RemoteUser, activity: IRemove): Promise<void> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			throw new Error('invalid actor');
 		}

@ -586,7 +589,7 @@ export class ApInboxService {

 	@bindThis
 	private async undo(actor: RemoteUser, activity: IUndo): Promise<string> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			throw new Error('invalid actor');
 		}

@ -719,7 +722,7 @@ export class ApInboxService {

 	@bindThis
 	private async update(actor: RemoteUser, activity: IUpdate): Promise<string> {
-		if ('actor' in activity && actor.uri !== activity.actor) {
+		if (actor.uri !== activity.actor) {
 			return 'skip: invalid actor';
 		}

@ -733,7 +736,7 @@ export class ApInboxService {
 		});

 		if (isActor(object)) {
-			await this.apPersonService.updatePerson(actor.uri!, resolver, object);
+			await this.apPersonService.updatePerson(actor.uri, resolver, object);
 			return 'ok: Person updated';
 		} else if (getApType(object) === 'Question') {
 			await this.apQuestionService.updateQuestion(object, resolver).catch(err => console.error(err));
--- a/packages/backend/src/core/activitypub/ApMfmService.ts
+++ b/packages/backend/src/core/activitypub/ApMfmService.ts
@ -4,9 +4,9 @@ import { DI } from '@/di-symbols.js';
 import type { Config } from '@/config.js';
 import { MfmService } from '@/core/MfmService.js';
 import type { Note } from '@/models/entities/Note.js';
+import { bindThis } from '@/decorators.js';
 import { extractApHashtagObjects } from './models/tag.js';
 import type { IObject } from './type.js';
-import { bindThis } from '@/decorators.js';

@Injectable()
 export class ApMfmService {
@ -19,14 +19,13 @@ export class ApMfmService {
 	}

 	@bindThis
-	public htmlToMfm(html: string, tag?: IObject | IObject[]) {
-		const hashtagNames = extractApHashtagObjects(tag).map(x => x.name).filter((x): x is string => x != null);
-
+	public htmlToMfm(html: string, tag?: IObject | IObject[]): string {
+		const hashtagNames = extractApHashtagObjects(tag).map(x => x.name);
 		return this.mfmService.fromHtml(html, hashtagNames);
 	}

 	@bindThis
-	public getNoteHtml(note: Note) {
+	public getNoteHtml(note: Note): string | null {
 		if (!note.text) return '';
 		return this.mfmService.toHtml(mfm.parse(note.text), JSON.parse(note.mentionedRemoteUsers));
 	}
--- a/packages/backend/src/core/activitypub/ApRendererService.ts
+++ b/packages/backend/src/core/activitypub/ApRendererService.ts
@ -1,6 +1,6 @@
 import { createPublicKey } from 'node:crypto';
 import { Inject, Injectable } from '@nestjs/common';
-import { In, IsNull } from 'typeorm';
+import { In } from 'typeorm';
 import { v4 as uuid } from 'uuid';
 import * as mfm from 'mfm-js';
 import { DI } from '@/di-symbols.js';
@ -26,7 +26,6 @@ import { isNotNull } from '@/misc/is-not-null.js';
 import { LdSignatureService } from './LdSignatureService.js';
 import { ApMfmService } from './ApMfmService.js';
 import type { IAccept, IActivity, IAdd, IAnnounce, IApDocument, IApEmoji, IApHashtag, IApImage, IApMention, IBlock, ICreate, IDelete, IFlag, IFollow, IKey, ILike, IMove, IObject, IPost, IQuestion, IReject, IRemove, ITombstone, IUndo, IUpdate } from './type.js';
-import type { IIdentifier } from './models/identifier.js';

@Injectable()
 export class ApRendererService {
@ -63,7 +62,7 @@ export class ApRendererService {
 	}

 	@bindThis
-	public renderAccept(object: any, user: { id: User['id']; host: null }): IAccept {
+	public renderAccept(object: string | IObject, user: { id: User['id']; host: null }): IAccept {
 		return {
 			type: 'Accept',
 			actor: this.userEntityService.genLocalUserUri(user.id),
@ -72,7 +71,7 @@ export class ApRendererService {
 	}

 	@bindThis
-	public renderAdd(user: LocalUser, target: any, object: any): IAdd {
+	public renderAdd(user: LocalUser, target: string | IObject | undefined, object: string | IObject): IAdd {
 		return {
 			type: 'Add',
 			actor: this.userEntityService.genLocalUserUri(user.id),
@ -82,7 +81,7 @@ export class ApRendererService {
 	}

 	@bindThis
-	public renderAnnounce(object: any, note: Note): IAnnounce {
+	public renderAnnounce(object: string | IObject, note: Note): IAnnounce {
 		const attributedTo = this.userEntityService.genLocalUserUri(note.userId);

 		let to: string[] = [];
@ -133,13 +132,13 @@ export class ApRendererService {

 	@bindThis
 	public renderCreate(object: IObject, note: Note): ICreate {
-		const activity = {
+		const activity: ICreate = {
 			id: `${this.config.url}/notes/${note.id}/activity`,
 			actor: this.userEntityService.genLocalUserUri(note.userId),
 			type: 'Create',
 			published: note.createdAt.toISOString(),
 			object,
-		} as ICreate;
+		};

 		if (object.to) activity.to = object.to;
 		if (object.cc) activity.cc = object.cc;
@ -209,7 +208,7 @@ export class ApRendererService {
 	 * @param id Follower|Followee ID
 	 */
 	@bindThis
-	public async renderFollowUser(id: User['id']) {
+	public async renderFollowUser(id: User['id']): Promise<string> {
 		const user = await this.usersRepository.findOneByOrFail({ id: id }) as PartialLocalUser | PartialRemoteUser;
 		return this.userEntityService.getUserUri(user);
 	}
@ -223,8 +222,8 @@ export class ApRendererService {
 		return {
 			id: requestId ?? `${this.config.url}/follows/${follower.id}/${followee.id}`,
 			type: 'Follow',
-			actor: this.userEntityService.getUserUri(follower)!,
-			object: this.userEntityService.getUserUri(followee)!,
+			actor: this.userEntityService.getUserUri(follower),
+			object: this.userEntityService.getUserUri(followee),
 		};
 	}

@ -264,14 +263,14 @@ export class ApRendererService {
 	public async renderLike(noteReaction: NoteReaction, note: { uri: string | null }): Promise<ILike> {
 		const reaction = noteReaction.reaction;

-		const object = {
+		const object: ILike = {
 			type: 'Like',
 			id: `${this.config.url}/likes/${noteReaction.id}`,
 			actor: `${this.config.url}/users/${noteReaction.userId}`,
 			object: note.uri ? note.uri : `${this.config.url}/notes/${noteReaction.noteId}`,
 			content: reaction,
 			_misskey_reaction: reaction,
-		} as ILike;
+		};

 		if (reaction.startsWith(':')) {
 			const name = reaction.replaceAll(':', '');
@ -287,7 +286,7 @@ export class ApRendererService {
 	public renderMention(mention: PartialLocalUser | PartialRemoteUser): IApMention {
 		return {
 			type: 'Mention',
-			href: this.userEntityService.getUserUri(mention)!,
+			href: this.userEntityService.getUserUri(mention),
 			name: this.userEntityService.isRemoteUser(mention) ? `@${mention.username}@${mention.host}` : `@${(mention as LocalUser).username}`,
 		};
 	}
@ -297,8 +296,8 @@ export class ApRendererService {
 		src: PartialLocalUser | PartialRemoteUser,
 		dst: PartialLocalUser | PartialRemoteUser,
 	): IMove {
-		const actor = this.userEntityService.getUserUri(src)!;
-		const target = this.userEntityService.getUserUri(dst)!;
+		const actor = this.userEntityService.getUserUri(src);
+		const target = this.userEntityService.getUserUri(dst);
 		return {
 			id: `${this.config.url}/moves/${src.id}/${dst.id}`,
 			actor,
@ -310,10 +309,10 @@ export class ApRendererService {

 	@bindThis
 	public async renderNote(note: Note, dive = true): Promise<IPost> {
-		const getPromisedFiles = async (ids: string[]) => {
-			if (!ids || ids.length === 0) return [];
+		const getPromisedFiles = async (ids: string[]): Promise<DriveFile[]> => {
+			if (ids.length === 0) return [];
 			const items = await this.driveFilesRepository.findBy({ id: In(ids) });
-			return ids.map(id => items.find(item => item.id === id)).filter(item => item != null) as DriveFile[];
+			return ids.map(id => items.find(item => item.id === id)).filter((item): item is DriveFile => item != null);
 		};

 		let inReplyTo;
@ -375,7 +374,7 @@ export class ApRendererService {
 			id: In(note.mentions),
 		}) : [];

-		const hashtagTags = (note.tags ?? []).map(tag => this.renderHashtag(tag));
+		const hashtagTags = note.tags.map(tag => this.renderHashtag(tag));
 		const mentionTags = mentionedUsers.map(u => this.renderMention(u as LocalUser | RemoteUser));

 		const files = await getPromisedFiles(note.fileIds);
@ -451,37 +450,26 @@ export class ApRendererService {
 	@bindThis
 	public async renderPerson(user: LocalUser) {
 		const id = this.userEntityService.genLocalUserUri(user.id);
-		const isSystem = !!user.username.match(/\./);
+		const isSystem = user.username.includes('.');

 		const [avatar, banner, profile] = await Promise.all([
-			user.avatarId ? this.driveFilesRepository.findOneBy({ id: user.avatarId }) : Promise.resolve(undefined),
-			user.bannerId ? this.driveFilesRepository.findOneBy({ id: user.bannerId }) : Promise.resolve(undefined),
+			user.avatarId ? this.driveFilesRepository.findOneBy({ id: user.avatarId }) : undefined,
+			user.bannerId ? this.driveFilesRepository.findOneBy({ id: user.bannerId }) : undefined,
 			this.userProfilesRepository.findOneByOrFail({ userId: user.id }),
 		]);

-		const attachment: {
+		const attachment = profile.fields.map(field => ({
 			type: 'PropertyValue',
-			name: string,
-			value: string,
-			identifier?: IIdentifier,
-		}[] = [];
-
-		if (profile.fields) {
-			for (const field of profile.fields) {
-				attachment.push({
-					type: 'PropertyValue',
-					name: field.name,
-					value: (field.value != null && field.value.match(/^https?:/))
-						? `<a href="${new URL(field.value).href}" rel="me nofollow noopener" target="_blank">${new URL(field.value).href}</a>`
-						: field.value,
-				});
-			}
-		}
+			name: field.name,
+			value: /^https?:/.test(field.value)
+				? `<a href="${new URL(field.value).href}" rel="me nofollow noopener" target="_blank">${new URL(field.value).href}</a>`
+				: field.value,
+		}));

 		const emojis = await this.getEmojis(user.emojis);
 		const apemojis = emojis.filter(emoji => !emoji.localOnly).map(emoji => this.renderEmoji(emoji));

-		const hashtagTags = (user.tags ?? []).map(tag => this.renderHashtag(tag));
+		const hashtagTags = user.tags.map(tag => this.renderHashtag(tag));

 		const tag = [
 			...apemojis,
@ -490,7 +478,7 @@ export class ApRendererService {

 		const keypair = await this.userKeypairService.getUserKeypair(user.id);

-		const person = {
+		const person: any = {
 			type: isSystem ? 'Application' : user.isBot ? 'Service' : 'Person',
 			id,
 			inbox: `${id}/inbox`,
@ -508,11 +496,11 @@ export class ApRendererService {
 			image: banner ? this.renderImage(banner) : null,
 			tag,
 			manuallyApprovesFollowers: user.isLocked,
-			discoverable: !!user.isExplorable,
+			discoverable: user.isExplorable,
 			publicKey: this.renderKey(user, keypair, '#main-key'),
 			isCat: user.isCat,
 			attachment: attachment.length ? attachment : undefined,
-		} as any;
+		};

 		if (user.movedToUri) {
 			person.movedTo = user.movedToUri;
@ -552,7 +540,7 @@ export class ApRendererService {
 	}

 	@bindThis
-	public renderReject(object: any, user: { id: User['id'] }): IReject {
+	public renderReject(object: string | IObject, user: { id: User['id'] }): IReject {
 		return {
 			type: 'Reject',
 			actor: this.userEntityService.genLocalUserUri(user.id),
@ -561,7 +549,7 @@ export class ApRendererService {
 	}

 	@bindThis
-	public renderRemove(user: { id: User['id'] }, target: any, object: any): IRemove {
+	public renderRemove(user: { id: User['id'] }, target: string | IObject | undefined, object: string | IObject): IRemove {
 		return {
 			type: 'Remove',
 			actor: this.userEntityService.genLocalUserUri(user.id),
@ -579,8 +567,8 @@ export class ApRendererService {
 	}

 	@bindThis
-	public renderUndo(object: any, user: { id: User['id'] }): IUndo {
-		const id = typeof object.id === 'string' && object.id.startsWith(this.config.url) ? `${object.id}/undo` : undefined;
+	public renderUndo(object: string | IObject, user: { id: User['id'] }): IUndo {
+		const id = typeof object !== 'string' && typeof object.id === 'string' && object.id.startsWith(this.config.url) ? `${object.id}/undo` : undefined;

 		return {
 			type: 'Undo',
@ -592,7 +580,7 @@ export class ApRendererService {
 	}

 	@bindThis
-	public renderUpdate(object: any, user: { id: User['id'] }): IUpdate {
+	public renderUpdate(object: string | IObject, user: { id: User['id'] }): IUpdate {
 		return {
 			id: `${this.config.url}/users/${user.id}#updates/${new Date().getTime()}`,
 			actor: this.userEntityService.genLocalUserUri(user.id),
@ -658,7 +646,7 @@ export class ApRendererService {
 					vcard: 'http://www.w3.org/2006/vcard/ns#',
 				},
 			],
-		}, x as T & { id: string; });
+		}, x as T & { id: string });
 	}

 	@bindThis
@ -683,13 +671,13 @@ export class ApRendererService {
 	 */
 	@bindThis
 	public renderOrderedCollectionPage(id: string, totalItems: any, orderedItems: any, partOf: string, prev?: string, next?: string) {
-		const page = {
+		const page: any = {
 			id,
 			partOf,
 			type: 'OrderedCollectionPage',
 			totalItems,
 			orderedItems,
-		} as any;
+		};

 		if (prev) page.prev = prev;
 		if (next) page.next = next;
@ -706,7 +694,7 @@ export class ApRendererService {
 	 * @param orderedItems attached objects (optional)
 	 */
 	@bindThis
-	public renderOrderedCollection(id: string | null, totalItems: any, first?: string, last?: string, orderedItems?: IObject[]) {
+	public renderOrderedCollection(id: string, totalItems: number, first?: string, last?: string, orderedItems?: IObject[]) {
 		const page: any = {
 			id,
 			type: 'OrderedCollection',
@ -722,7 +710,7 @@ export class ApRendererService {

 	@bindThis
 	private async getEmojis(names: string[]): Promise<Emoji[]> {
-		if (names == null || names.length === 0) return [];
+		if (names.length === 0) return [];

 		const allEmojis = await this.customEmojiService.localEmojisCache.fetch();
 		const emojis = names.map(name => allEmojis.get(name)).filter(isNotNull);
--- a/packages/backend/src/core/activitypub/ApRequestService.ts
+++ b/packages/backend/src/core/activitypub/ApRequestService.ts
@ -140,7 +140,7 @@ export class ApRequestService {
 	}

 	@bindThis
-	public async signedPost(user: { id: User['id'] }, url: string, object: any) {
+	public async signedPost(user: { id: User['id'] }, url: string, object: unknown): Promise<void> {
 		const body = JSON.stringify(object);

 		const keypair = await this.userKeypairService.getUserKeypair(user.id);
@ -169,7 +169,7 @@ export class ApRequestService {
 	 * @param url URL to fetch
 	 */
 	@bindThis
-	public async signedGet(url: string, user: { id: User['id'] }) {
+	public async signedGet(url: string, user: { id: User['id'] }): Promise<unknown> {
 		const keypair = await this.userKeypairService.getUserKeypair(user.id);

 		const req = ApRequestCreator.createSignedGet({
--- a/packages/backend/src/core/activitypub/ApResolverService.ts
+++ b/packages/backend/src/core/activitypub/ApResolverService.ts
@ -61,10 +61,6 @@ export class Resolver {

 	@bindThis
 	public async resolve(value: string | IObject): Promise<IObject> {
-		if (value == null) {
-			throw new Error('resolvee is null (or undefined)');
-		}
-
 		if (typeof value !== 'string') {
 			return value;
 		}
@ -104,11 +100,11 @@ export class Resolver {
 			? await this.apRequestService.signedGet(value, this.user) as IObject
 			: await this.httpRequestService.getJson(value, 'application/activity+json, application/ld+json')) as IObject;

-		if (object == null || (
+		if (
 			Array.isArray(object['@context']) ?
 				!(object['@context'] as unknown[]).includes('https://www.w3.org/ns/activitystreams') :
 				object['@context'] !== 'https://www.w3.org/ns/activitystreams'
-		)) {
+		) {
 			throw new Error('invalid response');
 		}

--- a/packages/backend/src/core/activitypub/LdSignatureService.ts
+++ b/packages/backend/src/core/activitypub/LdSignatureService.ts
@ -3,6 +3,8 @@ import { Injectable } from '@nestjs/common';
 import { HttpRequestService } from '@/core/HttpRequestService.js';
 import { bindThis } from '@/decorators.js';
 import { CONTEXTS } from './misc/contexts.js';
+import type { JsonLdDocument } from 'jsonld';
+import type { JsonLd, RemoteDocument } from 'jsonld/jsonld-spec.js';

 // RsaSignature2017 based from https://github.com/transmute-industries/RsaSignature2017

@ -18,22 +20,21 @@ class LdSignature {

 	@bindThis
 	public async signRsaSignature2017(data: any, privateKey: string, creator: string, domain?: string, created?: Date): Promise<any> {
-		const options = {
-			type: 'RsaSignature2017',
-			creator,
-			domain,
-			nonce: crypto.randomBytes(16).toString('hex'),
-			created: (created ?? new Date()).toISOString(),
-		} as {
+		const options: {
 			type: string;
 			creator: string;
 			domain?: string;
 			nonce: string;
 			created: string;
+		} = {
+			type: 'RsaSignature2017',
+			creator,
+			nonce: crypto.randomBytes(16).toString('hex'),
+			created: (created ?? new Date()).toISOString(),
 		};

-		if (!domain) {
-			delete options.domain;
+		if (domain) {
+			options.domain = domain;
 		}

 		const toBeSigned = await this.createVerifyData(data, options);
@ -62,7 +63,7 @@ class LdSignature {
 	}

 	@bindThis
-	public async createVerifyData(data: any, options: any) {
+	public async createVerifyData(data: any, options: any): Promise<string> {
 		const transformedOptions = {
 			...options,
 			'@context': 'https://w3id.org/identity/v1',
@ -82,7 +83,7 @@ class LdSignature {
 	}

 	@bindThis
-	public async normalize(data: any) {
+	public async normalize(data: JsonLdDocument): Promise<string> {
 		const customLoader = this.getLoader();
 		// XXX: Importing jsonld dynamically since Jest frequently fails to import it statically
 		// https://github.com/misskey-dev/misskey/pull/9894#discussion_r1103753595
@ -93,14 +94,14 @@ class LdSignature {

 	@bindThis
 	private getLoader() {
-		return async (url: string): Promise<any> => {
-			if (!url.match('^https?\:\/\/')) throw new Error(`Invalid URL ${url}`);
+		return async (url: string): Promise<RemoteDocument> => {
+			if (!/^https?:\/\//.test(url)) throw new Error(`Invalid URL ${url}`);

 			if (this.preLoad) {
 				if (url in CONTEXTS) {
 					if (this.debug) console.debug(`HIT: ${url}`);
 					return {
-						contextUrl: null,
+						contextUrl: undefined,
 						document: CONTEXTS[url],
 						documentUrl: url,
 					};
@ -110,7 +111,7 @@ class LdSignature {
 			if (this.debug) console.debug(`MISS: ${url}`);
 			const document = await this.fetchDocument(url);
 			return {
-				contextUrl: null,
+				contextUrl: undefined,
 				document: document,
 				documentUrl: url,
 			};
@ -118,13 +119,17 @@ class LdSignature {
 	}

 	@bindThis
-	private async fetchDocument(url: string) {
-		const json = await this.httpRequestService.send(url, {
-			headers: {
-				Accept: 'application/ld+json, application/json',
+	private async fetchDocument(url: string): Promise<JsonLd> {
+		const json = await this.httpRequestService.send(
+			url,
+			{
+				headers: {
+					Accept: 'application/ld+json, application/json',
+				},
+				timeout: this.loderTimeout,
 			},
-			timeout: this.loderTimeout,
-		}, { throwErrorWhenResponseNotOk: false }).then(res => {
+			{ throwErrorWhenResponseNotOk: false },
+		).then(res => {
 			if (!res.ok) {
 				throw new Error(`${res.status} ${res.statusText}`);
 			} else {
@ -132,7 +137,7 @@ class LdSignature {
 			}
 		});

-		return json;
+		return json as JsonLd;
 	}

 	@bindThis
--- a/packages/backend/src/core/activitypub/misc/contexts.ts
+++ b/packages/backend/src/core/activitypub/misc/contexts.ts
@ -1,3 +1,5 @@
+import type { JsonLd } from 'jsonld/jsonld-spec.js';
+
 /* eslint:disable:quotemark indent */
 const id_v1 = {
 	'@context': {
@ -86,7 +88,7 @@ const id_v1 = {
 		'accessControl': { '@id': 'perm:accessControl', '@type': '@id' },
 		'writePermission': { '@id': 'perm:writePermission', '@type': '@id' },
 	},
-};
+} satisfies JsonLd;

 const security_v1 = {
 	'@context': {
@ -137,7 +139,7 @@ const security_v1 = {
 		'signatureAlgorithm': 'sec:signingAlgorithm',
 		'signatureValue': 'sec:signatureValue',
 	},
-};
+} satisfies JsonLd;

 const activitystreams = {
 	'@context': {
@ -517,9 +519,9 @@ const activitystreams = {
 			'@type': '@id',
 		},
 	},
-};
+} satisfies JsonLd;

-export const CONTEXTS: Record<string, unknown> = {
+export const CONTEXTS: Record<string, JsonLd> = {
 	'https://w3id.org/identity/v1': id_v1,
 	'https://w3id.org/security/v1': security_v1,
 	'https://www.w3.org/ns/activitystreams': activitystreams,
--- a/packages/backend/src/core/activitypub/models/ApNoteService.ts
+++ b/packages/backend/src/core/activitypub/models/ApNoteService.ts
@ -200,7 +200,7 @@ export class ApNoteService {
 				| { status: 'ok'; res: Note }
 				| { status: 'permerror' | 'temperror' }
 			> => {
-				if (!uri.match(/^https?:/)) return { status: 'permerror' };
+				if (!/^https?:/.test(uri)) return { status: 'permerror' };
 				try {
 					const res = await this.resolveNote(uri);
 					if (res == null) return { status: 'permerror' };
--- a/packages/backend/src/core/activitypub/type.ts
+++ b/packages/backend/src/core/activitypub/type.ts
@ -194,7 +194,6 @@ export interface IApPropertyValue extends IObject {
 }

 export const isPropertyValue = (object: IObject): object is IApPropertyValue =>
-	object &&
 	getApType(object) === 'PropertyValue' &&
 	typeof object.name === 'string' &&
 	'value' in object &&
--- a/packages/backend/src/core/chart/core.ts
+++ b/packages/backend/src/core/chart/core.ts
@ -254,7 +254,7 @@ export default abstract class Chart<T extends Schema> {
 	private convertRawRecord(x: RawRecord<T>): KVs<T> {
 		const kvs = {} as Record<string, number>;
 		for (const k of Object.keys(x).filter((k) => k.startsWith(COLUMN_PREFIX)) as (keyof Columns<T>)[]) {
-			kvs[(k as string).substr(COLUMN_PREFIX.length).split(COLUMN_DELIMITER).join('.')] = x[k] as unknown as number;
+			kvs[(k as string).substring(COLUMN_PREFIX.length).split(COLUMN_DELIMITER).join('.')] = x[k] as unknown as number;
 		}
 		return kvs as KVs<T>;
 	}
@ -627,7 +627,7 @@ export default abstract class Chart<T extends Schema> {
 			}

 		// 要求された範囲の最も古い箇所に位置するログが存在しなかったら
-		} else if (!isTimeSame(new Date(logs[logs.length - 1].date * 1000), gt)) {
+		} else if (!isTimeSame(new Date(logs.at(-1)!.date * 1000), gt)) {
 			// 要求された範囲の最も古い箇所時点での最も新しいログを持ってきて末尾に追加する
 			// (隙間埋めできないため)
 			const outdatedLog = await repository.findOne({
--- a/packages/backend/src/misc/acct.ts
+++ b/packages/backend/src/misc/acct.ts
@ -4,7 +4,7 @@ export type Acct = {
 };

 export function parse(acct: string): Acct {
-	if (acct.startsWith('@')) acct = acct.substr(1);
+	if (acct.startsWith('@')) acct = acct.substring(1);
 	const split = acct.split('@', 2);
 	return { username: split[0], host: split[1] ?? null };
 }
--- a/packages/backend/src/misc/prelude/array.ts
+++ b/packages/backend/src/misc/prelude/array.ts
@ -67,8 +67,9 @@ export function maximum(xs: number[]): number {
 export function groupBy<T>(f: EndoRelation<T>, xs: T[]): T[][] {
 	const groups = [] as T[][];
 	for (const x of xs) {
-		if (groups.length !== 0 && f(groups[groups.length - 1][0], x)) {
-			groups[groups.length - 1].push(x);
+		const lastGroup = groups.at(-1);
+		if (lastGroup !== undefined && f(lastGroup[0], x)) {
+			lastGroup.push(x);
 		} else {
 			groups.push([x]);
 		}
--- a/packages/backend/src/queue/processors/CleanRemoteFilesProcessorService.ts
+++ b/packages/backend/src/queue/processors/CleanRemoteFilesProcessorService.ts
@ -1,7 +1,7 @@
 import { Inject, Injectable } from '@nestjs/common';
 import { IsNull, MoreThan, Not } from 'typeorm';
 import { DI } from '@/di-symbols.js';
-import type { DriveFilesRepository } from '@/models/index.js';
+import type { DriveFile, DriveFilesRepository } from '@/models/index.js';
 import type { Config } from '@/config.js';
 import type Logger from '@/logger.js';
 import { DriveService } from '@/core/DriveService.js';
@ -31,7 +31,7 @@ export class CleanRemoteFilesProcessorService {
 		this.logger.info('Deleting cached remote files...');

 		let deletedCount = 0;
-		let cursor: any = null;
+		let cursor: DriveFile['id'] | null = null;

 		while (true) {
 			const files = await this.driveFilesRepository.find({
@ -51,7 +51,7 @@ export class CleanRemoteFilesProcessorService {
 				break;
 			}

-			cursor = files[files.length - 1].id;
+			cursor = files.at(-1)?.id ?? null;

 			await Promise.all(files.map(file => this.driveService.deleteFileSync(file, true)));

--- a/packages/backend/src/queue/processors/DeleteAccountProcessorService.ts
+++ b/packages/backend/src/queue/processors/DeleteAccountProcessorService.ts
@ -70,7 +70,7 @@ export class DeleteAccountProcessorService {
 					break;
 				}

-				cursor = notes[notes.length - 1].id;
+				cursor = notes.at(-1)?.id ?? null;

 				await this.notesRepository.delete(notes.map(note => note.id));

@ -101,7 +101,7 @@ export class DeleteAccountProcessorService {
 					break;
 				}

-				cursor = files[files.length - 1].id;
+				cursor = files.at(-1)?.id ?? null;

 				for (const file of files) {
 					await this.driveService.deleteFileSync(file);
--- a/packages/backend/src/queue/processors/DeleteDriveFilesProcessorService.ts
+++ b/packages/backend/src/queue/processors/DeleteDriveFilesProcessorService.ts
@ -1,7 +1,7 @@
 import { Inject, Injectable } from '@nestjs/common';
 import { MoreThan } from 'typeorm';
 import { DI } from '@/di-symbols.js';
-import type { UsersRepository, DriveFilesRepository } from '@/models/index.js';
+import type { UsersRepository, DriveFilesRepository, DriveFile } from '@/models/index.js';
 import type { Config } from '@/config.js';
 import type Logger from '@/logger.js';
 import { DriveService } from '@/core/DriveService.js';
@ -40,7 +40,7 @@ export class DeleteDriveFilesProcessorService {
 		}

 		let deletedCount = 0;
-		let cursor: any = null;
+		let cursor: DriveFile['id'] | null = null;

 		while (true) {
 			const files = await this.driveFilesRepository.find({
@ -59,7 +59,7 @@ export class DeleteDriveFilesProcessorService {
 				break;
 			}

-			cursor = files[files.length - 1].id;
+			cursor = files.at(-1)?.id ?? null;

 			for (const file of files) {
 				await this.driveService.deleteFileSync(file);
--- a/packages/backend/src/queue/processors/ExportBlockingProcessorService.ts
+++ b/packages/backend/src/queue/processors/ExportBlockingProcessorService.ts
@ -3,7 +3,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import { MoreThan } from 'typeorm';
 import { format as dateFormat } from 'date-fns';
 import { DI } from '@/di-symbols.js';
-import type { UsersRepository, BlockingsRepository } from '@/models/index.js';
+import type { UsersRepository, BlockingsRepository, Blocking } from '@/models/index.js';
 import type { Config } from '@/config.js';
 import type Logger from '@/logger.js';
 import { DriveService } from '@/core/DriveService.js';
@ -53,7 +53,7 @@ export class ExportBlockingProcessorService {
 			const stream = fs.createWriteStream(path, { flags: 'a' });

 			let exportedCount = 0;
-			let cursor: any = null;
+			let cursor: Blocking['id'] | null = null;

 			while (true) {
 				const blockings = await this.blockingsRepository.find({
@ -72,7 +72,7 @@ export class ExportBlockingProcessorService {
 					break;
 				}

-				cursor = blockings[blockings.length - 1].id;
+				cursor = blockings.at(-1)?.id ?? null;

 				for (const block of blockings) {
 					const u = await this.usersRepository.findOneBy({ id: block.blockeeId });
--- a/packages/backend/src/queue/processors/ExportFavoritesProcessorService.ts
+++ b/packages/backend/src/queue/processors/ExportFavoritesProcessorService.ts
@ -94,7 +94,7 @@ export class ExportFavoritesProcessorService {
 					break;
 				}

-				cursor = favorites[favorites.length - 1].id;
+				cursor = favorites.at(-1)?.id ?? null;

 				for (const favorite of favorites) {
 					let poll: Poll | undefined;
--- a/packages/backend/src/queue/processors/ExportFollowingProcessorService.ts
+++ b/packages/backend/src/queue/processors/ExportFollowingProcessorService.ts
@ -79,7 +79,7 @@ export class ExportFollowingProcessorService {
 					break;
 				}

-				cursor = followings[followings.length - 1].id;
+				cursor = followings.at(-1)?.id ?? null;

 				for (const following of followings) {
 					const u = await this.usersRepository.findOneBy({ id: following.followeeId });
--- a/packages/backend/src/queue/processors/ExportMutingProcessorService.ts
+++ b/packages/backend/src/queue/processors/ExportMutingProcessorService.ts
@ -3,7 +3,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import { IsNull, MoreThan } from 'typeorm';
 import { format as dateFormat } from 'date-fns';
 import { DI } from '@/di-symbols.js';
-import type { MutingsRepository, UsersRepository, BlockingsRepository } from '@/models/index.js';
+import type { MutingsRepository, UsersRepository, BlockingsRepository, Muting } from '@/models/index.js';
 import type { Config } from '@/config.js';
 import type Logger from '@/logger.js';
 import { DriveService } from '@/core/DriveService.js';
@ -56,7 +56,7 @@ export class ExportMutingProcessorService {
 			const stream = fs.createWriteStream(path, { flags: 'a' });

 			let exportedCount = 0;
-			let cursor: any = null;
+			let cursor: Muting['id'] | null = null;

 			while (true) {
 				const mutes = await this.mutingsRepository.find({
@ -76,7 +76,7 @@ export class ExportMutingProcessorService {
 					break;
 				}

-				cursor = mutes[mutes.length - 1].id;
+				cursor = mutes.at(-1)?.id ?? null;

 				for (const mute of mutes) {
 					const u = await this.usersRepository.findOneBy({ id: mute.muteeId });
--- a/packages/backend/src/queue/processors/ExportNotesProcessorService.ts
+++ b/packages/backend/src/queue/processors/ExportNotesProcessorService.ts
@ -90,7 +90,7 @@ export class ExportNotesProcessorService {
 					break;
 				}

-				cursor = notes[notes.length - 1].id;
+				cursor = notes.at(-1)?.id ?? null;

 				for (const note of notes) {
 					let poll: Poll | undefined;
--- a/packages/backend/src/server/ActivityPubServerService.ts
+++ b/packages/backend/src/server/ActivityPubServerService.ts
@ -181,7 +181,7 @@ export class ActivityPubServerService {
 				undefined,
 				inStock ? `${partOf}?${url.query({
 					page: 'true',
-					cursor: followings[followings.length - 1].id,
+					cursor: followings.at(-1)!.id,
 				})}` : undefined,
 			);

@ -189,7 +189,11 @@ export class ActivityPubServerService {
 			return (this.apRendererService.addContext(rendered));
 		} else {
 			// index page
-			const rendered = this.apRendererService.renderOrderedCollection(partOf, user.followersCount, `${partOf}?page=true`);
+			const rendered = this.apRendererService.renderOrderedCollection(
+				partOf,
+				user.followersCount,
+				`${partOf}?page=true`,
+			);
 			reply.header('Cache-Control', 'public, max-age=180');
 			this.setResponseType(request, reply);
 			return (this.apRendererService.addContext(rendered));
@ -269,7 +273,7 @@ export class ActivityPubServerService {
 				undefined,
 				inStock ? `${partOf}?${url.query({
 					page: 'true',
-					cursor: followings[followings.length - 1].id,
+					cursor: followings.at(-1)!.id,
 				})}` : undefined,
 			);

@ -277,7 +281,11 @@ export class ActivityPubServerService {
 			return (this.apRendererService.addContext(rendered));
 		} else {
 			// index page
-			const rendered = this.apRendererService.renderOrderedCollection(partOf, user.followingCount, `${partOf}?page=true`);
+			const rendered = this.apRendererService.renderOrderedCollection(
+				partOf,
+				user.followingCount,
+				`${partOf}?page=true`,
+			);
 			reply.header('Cache-Control', 'public, max-age=180');
 			this.setResponseType(request, reply);
 			return (this.apRendererService.addContext(rendered));
@ -310,7 +318,10 @@ export class ActivityPubServerService {

 		const rendered = this.apRendererService.renderOrderedCollection(
 			`${this.config.url}/users/${userId}/collections/featured`,
-			renderedNotes.length, undefined, undefined, renderedNotes,
+			renderedNotes.length,
+			undefined,
+			undefined,
+			renderedNotes,
 		);

 		reply.header('Cache-Control', 'public, max-age=180');
@ -387,7 +398,7 @@ export class ActivityPubServerService {
 				})}` : undefined,
 				notes.length ? `${partOf}?${url.query({
 					page: 'true',
-					until_id: notes[notes.length - 1].id,
+					until_id: notes.at(-1)!.id,
 				})}` : undefined,
 			);

@ -395,7 +406,9 @@ export class ActivityPubServerService {
 			return (this.apRendererService.addContext(rendered));
 		} else {
 			// index page
-			const rendered = this.apRendererService.renderOrderedCollection(partOf, user.notesCount,
+			const rendered = this.apRendererService.renderOrderedCollection(
+				partOf,
+				user.notesCount,
 				`${partOf}?page=true`,
 				`${partOf}?page=true&since_id=000000000000000000000000`,
 			);
--- a/packages/backend/test/utils.ts
+++ b/packages/backend/test/utils.ts
@ -447,12 +447,12 @@ export async function testPaginationConsistency<Entity extends { id: string, cre
 	for (const limit of [1, 5, 10, 100, undefined]) {
 		// 1. sinceId/DateとuntilId/Dateで両端を指定して取得した結果が期待通りになっていること
 		if (ordering === 'desc') {
-			const end = expected[expected.length - 1];
+			const end = expected.at(-1)!;
 			let last = await fetchEntities(rangeToParam({ limit, since: end }));
 			const actual: Entity[] = [];
 			while (last.length !== 0) {
 				actual.push(...last);
-				last = await fetchEntities(rangeToParam({ limit, until: last[last.length - 1], since: end }));
+				last = await fetchEntities(rangeToParam({ limit, until: last.at(-1), since: end }));
 			}
 			actual.push(end);
 			assert.deepStrictEqual(
@ -467,7 +467,7 @@ export async function testPaginationConsistency<Entity extends { id: string, cre
 			const actual: Entity[] = [];
 			while (last.length !== 0) {
 				actual.push(...last);
-				last = await fetchEntities(rangeToParam({ limit, since: last[last.length - 1] }));
+				last = await fetchEntities(rangeToParam({ limit, since: last.at(-1) }));
 			}
 			assert.deepStrictEqual(
 				actual.map(({ id, createdAt }) => id + ':' + createdAt),
@ -480,7 +480,7 @@ export async function testPaginationConsistency<Entity extends { id: string, cre
 			const actual: Entity[] = [];
 			while (last.length !== 0) {
 				actual.push(...last);
-				last = await fetchEntities(rangeToParam({ limit, until: last[last.length - 1] }));
+				last = await fetchEntities(rangeToParam({ limit, until: last.at(-1) }));
 			}
 			assert.deepStrictEqual(
 				actual.map(({ id, createdAt }) => id + ':' + createdAt),
--- a/packages/frontend/src/components/MkAsUi.vue
+++ b/packages/frontend/src/components/MkAsUi.vue
@ -39,7 +39,7 @@
 			<MkAsUi v-if="!g(child).hidden" :component="g(child)" :components="props.components" :size="size"/>
 		</template>
 	</MkFolder>
-	<div v-else-if="c.type === 'container'" :class="[$style.container, { [$style.fontSerif]: c.font === 'serif', [$style.fontMonospace]: c.font === 'monospace', [$style.containerCenter]: c.align === 'center' }]" :style="{ backgroundColor: c.bgColor ?? null, color: c.fgColor ?? null, borderWidth: c.borderWidth ? `${c.borderWidth}px` : 0, borderColor: c.borderColor ?? 'var(--divider)', padding: c.padding ? `${c.padding}px` : 0, borderRadius: c.rounded ? '8px' : 0 }">
+	<div v-else-if="c.type === 'container'" :class="[$style.container, { [$style.fontSerif]: c.font === 'serif', [$style.fontMonospace]: c.font === 'monospace' }]" :style="{ textAlign: c.align ?? null, backgroundColor: c.bgColor ?? null, color: c.fgColor ?? null, borderWidth: c.borderWidth ? `${c.borderWidth}px` : 0, borderColor: c.borderColor ?? 'var(--divider)', padding: c.padding ? `${c.padding}px` : 0, borderRadius: c.rounded ? '8px' : 0 }">
 		<template v-for="child in c.children" :key="child">
 			<MkAsUi v-if="!g(child).hidden" :component="g(child)" :components="props.components" :size="size" :align="c.align"/>
 		</template>
@ -102,10 +102,6 @@ function openPostForm() {
 	gap: 12px;
 }

-.containerCenter {
-	text-align: center;
-}
-
 .fontSerif {
 	font-family: serif;
 }
--- a/packages/frontend/src/components/MkDrive.file.vue
+++ b/packages/frontend/src/components/MkDrive.file.vue
@ -25,8 +25,8 @@
 		<MkDriveFileThumbnail :class="$style.thumbnail" :file="file" fit="contain"/>

 		<p :class="$style.name">
-			<span>{{ file.name.lastIndexOf('.') != -1 ? file.name.substr(0, file.name.lastIndexOf('.')) : file.name }}</span>
-			<span v-if="file.name.lastIndexOf('.') != -1" style="opacity: 0.5;">{{ file.name.substr(file.name.lastIndexOf('.')) }}</span>
+			<span>{{ file.name.lastIndexOf('.') != -1 ? file.name.substring(0, file.name.lastIndexOf('.')) : file.name }}</span>
+			<span v-if="file.name.lastIndexOf('.') != -1" style="opacity: 0.5;">{{ file.name.substring(file.name.lastIndexOf('.')) }}</span>
 		</p>
 	</div>
 </div>
--- a/packages/frontend/src/components/MkDrive.vue
+++ b/packages/frontend/src/components/MkDrive.vue
@ -568,7 +568,7 @@ function fetchMoreFolders() {
 	os.api('drive/folders', {
 		folderId: folder.value ? folder.value.id : null,
 		type: props.type,
-		untilId: folders.value[folders.value.length - 1].id,
+		untilId: folders.value.at(-1)?.id,
 		limit: max + 1,
 	}).then(folders => {
 		if (folders.length === max + 1) {
@ -591,7 +591,7 @@ function fetchMoreFiles() {
 	os.api('drive/files', {
 		folderId: folder.value ? folder.value.id : null,
 		type: props.type,
-		untilId: files.value[files.value.length - 1].id,
+		untilId: files.value.at(-1)?.id,
 		limit: max + 1,
 	}).then(files => {
 		if (files.length === max + 1) {
--- a/packages/frontend/src/components/MkLink.vue
+++ b/packages/frontend/src/components/MkLink.vue
@ -1,6 +1,6 @@
 <template>
 <component
-	:is="self ? 'MkA' : 'a'" ref="el" style="word-break: break-all;" class="_link" :[attr]="self ? url.substr(local.length) : url" :rel="rel" :target="target"
+	:is="self ? 'MkA' : 'a'" ref="el" style="word-break: break-all;" class="_link" :[attr]="self ? url.substring(local.length) : url" :rel="rel" :target="target"
 	:title="url"
 >
 	<slot></slot>
--- a/packages/frontend/src/components/MkMiniChart.vue
+++ b/packages/frontend/src/components/MkMiniChart.vue
@ -59,8 +59,8 @@ function draw(): void {

 	polygonPoints = `0,${ viewBoxY } ${ polylinePoints } ${ viewBoxX },${ viewBoxY }`;

-	headX = _polylinePoints[_polylinePoints.length - 1][0];
-	headY = _polylinePoints[_polylinePoints.length - 1][1];
+	headX = _polylinePoints.at(-1)![0];
+	headY = _polylinePoints.at(-1)![1];
 }

 watch(() => props.src, draw, { immediate: true });
--- a/packages/frontend/src/components/MkPageWindow.vue
+++ b/packages/frontend/src/components/MkPageWindow.vue
@ -120,7 +120,7 @@ const contextmenu = $computed(() => ([{

 function back() {
 	history.pop();
-	router.replace(history[history.length - 1].path, history[history.length - 1].key);
+	router.replace(history.at(-1)!.path, history.at(-1)!.key);
 }

 function reload() {
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@ -564,7 +564,7 @@ async function onPaste(ev: ClipboardEvent) {
 				return;
 			}

-			quoteId = paste.substr(url.length).match(/^\/notes\/(.+?)\/?$/)[1];
+			quoteId = paste.substring(url.length).match(/^\/notes\/(.+?)\/?$/)[1];
 		});
 	}
 }
--- a/packages/frontend/src/components/MkReactionsViewer.reaction.vue
+++ b/packages/frontend/src/components/MkReactionsViewer.reaction.vue
@ -6,7 +6,7 @@
 	:class="[$style.root, { [$style.reacted]: note.myReaction == reaction, [$style.canToggle]: canToggle, [$style.large]: defaultStore.state.largeNoteReactions }]"
 	@click="toggleReaction()"
 >
-	<MkReactionIcon :class="$style.icon" :reaction="reaction" :emojiUrl="note.reactionEmojis[reaction.substr(1, reaction.length - 2)]"/>
+	<MkReactionIcon :class="$style.icon" :reaction="reaction" :emojiUrl="note.reactionEmojis[reaction.substring(1, reaction.length - 1)]"/>
 	<span :class="$style.count">{{ count }}</span>
 </button>
 </template>
--- a/packages/frontend/src/components/MkUrlPreview.vue
+++ b/packages/frontend/src/components/MkUrlPreview.vue
@ -32,7 +32,7 @@
 	</div>
 </template>
 <div v-else>
-	<component :is="self ? 'MkA' : 'a'" :class="[$style.link, { [$style.compact]: compact }]" :[attr]="self ? url.substr(local.length) : url" rel="nofollow noopener" :target="target" :title="url">
+	<component :is="self ? 'MkA' : 'a'" :class="[$style.link, { [$style.compact]: compact }]" :[attr]="self ? url.substring(local.length) : url" rel="nofollow noopener" :target="target" :title="url">
 		<div v-if="thumbnail" :class="$style.thumbnail" :style="`background-image: url('${thumbnail}')`">
 		</div>
 		<article :class="$style.body">
--- a/packages/frontend/src/components/MkUserPopup.vue
+++ b/packages/frontend/src/components/MkUserPopup.vue
@ -88,7 +88,7 @@ onMounted(() => {
 		user = props.q;
 	} else {
 		const query = props.q.startsWith('@') ?
-			Acct.parse(props.q.substr(1)) :
+			Acct.parse(props.q.substring(1)) :
 			{ userId: props.q };

 		os.api('users/show', query).then(res => {
--- a/packages/frontend/src/components/global/MkCustomEmoji.vue
+++ b/packages/frontend/src/components/global/MkCustomEmoji.vue
@ -18,7 +18,7 @@ const props = defineProps<{
 	useOriginalSize?: boolean;
 }>();

-const customEmojiName = computed(() => (props.name[0] === ':' ? props.name.substr(1, props.name.length - 2) : props.name).replace('@.', ''));
+const customEmojiName = computed(() => (props.name[0] === ':' ? props.name.substring(1, props.name.length - 1) : props.name).replace('@.', ''));
 const isLocal = computed(() => !props.host && (customEmojiName.value.endsWith('@.') || !customEmojiName.value.includes('@')));

 const rawUrl = computed(() => {
--- a/packages/frontend/src/components/global/i18n.ts
+++ b/packages/frontend/src/components/global/i18n.ts
@ -11,13 +11,13 @@ export default function(props: { src: string; tag?: string; textTag?: string; },
 			parsed.push(str);
 			break;
 		} else {
-			if (nextBracketOpen > 0) parsed.push(str.substr(0, nextBracketOpen));
+			if (nextBracketOpen > 0) parsed.push(str.substring(0, nextBracketOpen));
 			parsed.push({
 				arg: str.substring(nextBracketOpen + 1, nextBracketClose),
 			});
 		}

-		str = str.substr(nextBracketClose + 1);
+		str = str.substring(nextBracketClose + 1);
 	}

 	return h(props.tag ?? 'span', parsed.map(x => typeof x === 'string' ? (props.textTag ? h(props.textTag, x) : x) : slots[x.arg]()));
--- a/packages/frontend/src/pages/about-misskey.vue
+++ b/packages/frontend/src/pages/about-misskey.vue
@ -88,10 +88,13 @@
 					<template #label>Special thanks</template>
 					<div class="_gaps" style="text-align: center;">
 						<div>
-							<a style="display: inline-block;" class="masknetwork" title="Mask Network" href="https://mask.io/" target="_blank"><img width="200" src="https://misskey-hub.net/sponsors/masknetwork.png" alt="Mask Network"></a>
+							<a style="display: inline-block;" class="masknetwork" title="Mask Network" href="https://mask.io/" target="_blank"><img width="180" src="https://misskey-hub.net/sponsors/masknetwork.png" alt="Mask Network"></a>
 						</div>
 						<div>
-							<a style="display: inline-block;" class="dcadvirth" title="DC Advirth" href="https://www.dotchain.ltd/advirth" target="_blank"><img width="200" src="https://misskey-hub.net/sponsors/dcadvirth.png" alt="DC Advirth"></a>
+							<a style="display: inline-block;" class="skeb" title="Skeb" href="https://skeb.jp/" target="_blank"><img width="180" src="https://misskey-hub.net/sponsors/skeb.svg" alt="Skeb"></a>
+						</div>
+						<div>
+							<a style="display: inline-block;" class="dcadvirth" title="DC Advirth" href="https://www.dotchain.ltd/advirth" target="_blank"><img width="100" src="https://misskey-hub.net/sponsors/dcadvirth.png" alt="DC Advirth"></a>
 						</div>
 					</div>
 				</FormSection>
@ -161,6 +164,9 @@ const patronsWithIcon = [{
 }, {
 	name: '清遊あみ',
 	icon: 'https://misskey-hub.net/patrons/de25195b88e940a388388bea2e7637d8.jpg',
+}, {
+	name: 'Nagi8410',
+	icon: 'https://misskey-hub.net/patrons/31b102ab4fc540ed806b0461575d38be.jpg',
 }];

 const patrons = [
@ -256,6 +262,7 @@ const patrons = [
 	'binvinyl',
 	'渡志郎',
 	'ぷーざ',
+	'越貝鯛丸',
 ];

 let thereIsTreasure = $ref($i && !claimedAchievements.includes('foundTreasure'));
--- a/packages/frontend/src/pages/admin/overview.queue.vue
+++ b/packages/frontend/src/pages/admin/overview.queue.vue
@ -85,7 +85,7 @@ onMounted(() => {
 	connection.on('stats', onStats);
 	connection.on('statsLog', onStatsLog);
 	connection.send('requestLog', {
-		id: Math.random().toString().substr(2, 8),
+		id: Math.random().toString().substring(2, 10),
 		length: 100,
 	});
 });
--- a/packages/frontend/src/pages/admin/overview.vue
+++ b/packages/frontend/src/pages/admin/overview.vue
@ -156,7 +156,7 @@ onMounted(async () => {

 	nextTick(() => {
 		queueStatsConnection.send('requestLog', {
-			id: Math.random().toString().substr(2, 8),
+			id: Math.random().toString().substring(2, 10),
 			length: 100,
 		});
 	});
--- a/packages/frontend/src/pages/admin/queue.chart.vue
+++ b/packages/frontend/src/pages/admin/queue.chart.vue
@ -106,7 +106,7 @@ onMounted(() => {
 	connection.on('stats', onStats);
 	connection.on('statsLog', onStatsLog);
 	connection.send('requestLog', {
-		id: Math.random().toString().substr(2, 8),
+		id: Math.random().toString().substring(2, 10),
 		length: 200,
 	});
 });
--- a/packages/frontend/src/scripts/aiscript/api.ts
+++ b/packages/frontend/src/scripts/aiscript/api.ts
@ -11,6 +11,7 @@ export function createAiScriptEnv(opts) {
 		USER_NAME: $i ? values.STR($i.name) : values.NULL,
 		USER_USERNAME: $i ? values.STR($i.username) : values.NULL,
 		CUSTOM_EMOJIS: utils.jsToVal(customEmojis.value),
+		CURRENT_URL: values.STR(window.location.href),
 		'Mk:dialog': values.FN_NATIVE(async ([title, text, type]) => {
 			await os.alert({
 				type: type ? type.value : 'info',
--- a/packages/frontend/src/scripts/array.ts
+++ b/packages/frontend/src/scripts/array.ts
@ -78,8 +78,9 @@ export function maximum(xs: number[]): number {
 export function groupBy<T>(f: EndoRelation<T>, xs: T[]): T[][] {
 	const groups = [] as T[][];
 	for (const x of xs) {
-		if (groups.length !== 0 && f(groups[groups.length - 1][0], x)) {
-			groups[groups.length - 1].push(x);
+		const lastGroup = groups.at(-1);
+		if (lastGroup !== undefined && f(lastGroup[0], x)) {
+			lastGroup.push(x);
 		} else {
 			groups.push([x]);
 		}
--- a/packages/frontend/src/scripts/autocomplete.ts
+++ b/packages/frontend/src/scripts/autocomplete.ts
@ -65,7 +65,7 @@ export class Autocomplete {
 	 */
 	private onInput() {
 		const caretPos = this.textarea.selectionStart;
-		const text = this.text.substr(0, caretPos).split('\n').pop()!;
+		const text = this.text.substring(0, caretPos).split('\n').pop()!;

 		const mentionIndex = text.lastIndexOf('@');
 		const hashtagIndex = text.lastIndexOf('#');
@ -91,7 +91,7 @@ export class Autocomplete {
 		let opened = false;

 		if (isMention) {
-			const username = text.substr(mentionIndex + 1);
+			const username = text.substring(mentionIndex + 1);
 			if (username !== '' && username.match(/^[a-zA-Z0-9_]+$/)) {
 				this.open('user', username);
 				opened = true;
@ -102,7 +102,7 @@ export class Autocomplete {
 		}

 		if (isHashtag && !opened) {
-			const hashtag = text.substr(hashtagIndex + 1);
+			const hashtag = text.substring(hashtagIndex + 1);
 			if (!hashtag.includes(' ')) {
 				this.open('hashtag', hashtag);
 				opened = true;
@ -110,7 +110,7 @@ export class Autocomplete {
 		}

 		if (isEmoji && !opened) {
-			const emoji = text.substr(emojiIndex + 1);
+			const emoji = text.substring(emojiIndex + 1);
 			if (!emoji.includes(' ')) {
 				this.open('emoji', emoji);
 				opened = true;
@ -118,7 +118,7 @@ export class Autocomplete {
 		}

 		if (isMfmTag && !opened) {
-			const mfmTag = text.substr(mfmTagIndex + 1);
+			const mfmTag = text.substring(mfmTagIndex + 1);
 			if (!mfmTag.includes(' ')) {
 				this.open('mfmTag', mfmTag.replace('[', ''));
 				opened = true;
@ -208,9 +208,9 @@ export class Autocomplete {
 		if (type === 'user') {
 			const source = this.text;

-			const before = source.substr(0, caret);
+			const before = source.substring(0, caret);
 			const trimmedBefore = before.substring(0, before.lastIndexOf('@'));
-			const after = source.substr(caret);
+			const after = source.substring(caret);

 			const acct = value.host === null ? value.username : `${value.username}@${toASCII(value.host)}`;

@ -226,9 +226,9 @@ export class Autocomplete {
 		} else if (type === 'hashtag') {
 			const source = this.text;

-			const before = source.substr(0, caret);
+			const before = source.substring(0, caret);
 			const trimmedBefore = before.substring(0, before.lastIndexOf('#'));
-			const after = source.substr(caret);
+			const after = source.substring(caret);

 			// 挿入
 			this.text = `${trimmedBefore}#${value} ${after}`;
@ -242,9 +242,9 @@ export class Autocomplete {
 		} else if (type === 'emoji') {
 			const source = this.text;

-			const before = source.substr(0, caret);
+			const before = source.substring(0, caret);
 			const trimmedBefore = before.substring(0, before.lastIndexOf(':'));
-			const after = source.substr(caret);
+			const after = source.substring(caret);

 			// 挿入
 			this.text = trimmedBefore + value + after;
@ -258,9 +258,9 @@ export class Autocomplete {
 		} else if (type === 'mfmTag') {
 			const source = this.text;

-			const before = source.substr(0, caret);
+			const before = source.substring(0, caret);
 			const trimmedBefore = before.substring(0, before.lastIndexOf('$'));
-			const after = source.substr(caret);
+			const after = source.substring(caret);

 			// 挿入
 			this.text = `${trimmedBefore}$[${value} ]${after}`;
--- a/packages/frontend/src/scripts/gen-search-query.ts
+++ b/packages/frontend/src/scripts/gen-search-query.ts
@ -5,7 +5,7 @@ export async function genSearchQuery(v: any, q: string) {
 	let host: string;
 	let userId: string;
 	if (q.split(' ').some(x => x.startsWith('@'))) {
-		for (const at of q.split(' ').filter(x => x.startsWith('@')).map(x => x.substr(1))) {
+		for (const at of q.split(' ').filter(x => x.startsWith('@')).map(x => x.substring(1))) {
 			if (at.includes('.')) {
 				if (at === localHost || at === '.') {
 					host = null;
--- a/packages/frontend/src/scripts/lookup.ts
+++ b/packages/frontend/src/scripts/lookup.ts
@ -18,7 +18,7 @@ export async function lookup(router?: Router) {
 	}

 	if (query.startsWith('#')) {
-		_router.push(`/tags/${encodeURIComponent(query.substr(1))}`);
+		_router.push(`/tags/${encodeURIComponent(query.substring(1))}`);
 		return;
 	}

--- a/packages/frontend/src/scripts/theme-editor.ts
+++ b/packages/frontend/src/scripts/theme-editor.ts
@ -35,7 +35,7 @@ export const fromThemeString = (str?: string) : ThemeValue => {
 	} else if (str.startsWith('"')) {
 		return {
 			type: 'css',
-			value: str.substr(1).trim(),
+			value: str.substring(1).trim(),
 		};
 	} else {
 		return str;
--- a/packages/frontend/src/scripts/theme.ts
+++ b/packages/frontend/src/scripts/theme.ts
@ -98,7 +98,7 @@ function compile(theme: Theme): Record<string, string> {
 	function getColor(val: string): tinycolor.Instance {
 		// ref (prop)
 		if (val[0] === '@') {
-			return getColor(theme.props[val.substr(1)]);
+			return getColor(theme.props[val.substring(1)]);
 		}

 		// ref (const)
@ -109,7 +109,7 @@ function compile(theme: Theme): Record<string, string> {
 		// func
 		else if (val[0] === ':') {
 			const parts = val.split('<');
-			const func = parts.shift().substr(1);
+			const func = parts.shift().substring(1);
 			const arg = parseFloat(parts.shift());
 			const color = getColor(parts.join('<'));

--- a/packages/frontend/src/widgets/WidgetJobQueue.vue
+++ b/packages/frontend/src/widgets/WidgetJobQueue.vue
@ -124,7 +124,7 @@ connection.on('stats', onStats);
 connection.on('statsLog', onStatsLog);

 connection.send('requestLog', {
-	id: Math.random().toString().substr(2, 8),
+	id: Math.random().toString().substring(2, 10),
 	length: 1,
 });

--- a/packages/frontend/src/widgets/server-metric/cpu-mem.vue
+++ b/packages/frontend/src/widgets/server-metric/cpu-mem.vue
@ -100,7 +100,7 @@ onMounted(() => {
 	props.connection.on('stats', onStats);
 	props.connection.on('statsLog', onStatsLog);
 	props.connection.send('requestLog', {
-		id: Math.random().toString().substr(2, 8),
+		id: Math.random().toString().substring(2, 10),
 	});
 });

@ -121,10 +121,10 @@ function onStats(connStats) {
 	cpuPolygonPoints = `${viewBoxX - (stats.length - 1)},${viewBoxY} ${cpuPolylinePoints} ${viewBoxX},${viewBoxY}`;
 	memPolygonPoints = `${viewBoxX - (stats.length - 1)},${viewBoxY} ${memPolylinePoints} ${viewBoxX},${viewBoxY}`;

-	cpuHeadX = cpuPolylinePointsStats[cpuPolylinePointsStats.length - 1][0];
-	cpuHeadY = cpuPolylinePointsStats[cpuPolylinePointsStats.length - 1][1];
-	memHeadX = memPolylinePointsStats[memPolylinePointsStats.length - 1][0];
-	memHeadY = memPolylinePointsStats[memPolylinePointsStats.length - 1][1];
+	cpuHeadX = cpuPolylinePointsStats.at(-1)![0];
+	cpuHeadY = cpuPolylinePointsStats.at(-1)![1];
+	memHeadX = memPolylinePointsStats.at(-1)![0];
+	memHeadY = memPolylinePointsStats.at(-1)![1];

 	cpuP = (connStats.cpu * 100).toFixed(0);
 	memP = (connStats.mem.active / props.meta.mem.total * 100).toFixed(0);
--- a/packages/frontend/src/widgets/server-metric/net.vue
+++ b/packages/frontend/src/widgets/server-metric/net.vue
@ -70,7 +70,7 @@ onMounted(() => {
 	props.connection.on('stats', onStats);
 	props.connection.on('statsLog', onStatsLog);
 	props.connection.send('requestLog', {
-		id: Math.random().toString().substr(2, 8),
+		id: Math.random().toString().substring(2, 10),
 	});
 });

@ -94,10 +94,10 @@ function onStats(connStats) {
 	inPolygonPoints = `${viewBoxX - (stats.length - 1)},${viewBoxY} ${inPolylinePoints} ${viewBoxX},${viewBoxY}`;
 	outPolygonPoints = `${viewBoxX - (stats.length - 1)},${viewBoxY} ${outPolylinePoints} ${viewBoxX},${viewBoxY}`;

-	inHeadX = inPolylinePointsStats[inPolylinePointsStats.length - 1][0];
-	inHeadY = inPolylinePointsStats[inPolylinePointsStats.length - 1][1];
-	outHeadX = outPolylinePointsStats[outPolylinePointsStats.length - 1][0];
-	outHeadY = outPolylinePointsStats[outPolylinePointsStats.length - 1][1];
+	inHeadX = inPolylinePointsStats.at(-1)![0];
+	inHeadY = inPolylinePointsStats.at(-1)![1];
+	outHeadX = outPolylinePointsStats.at(-1)![0];
+	outHeadY = outPolylinePointsStats.at(-1)![1];

 	inRecent = connStats.net.rx;
 	outRecent = connStats.net.tx;
--- a/packages/misskey-js/src/acct.ts
+++ b/packages/misskey-js/src/acct.ts
@ -4,7 +4,7 @@ export type Acct = {
 };

 export function parse(acct: string): Acct {
-	if (acct.startsWith('@')) acct = acct.substr(1);
+	if (acct.startsWith('@')) acct = acct.substring(1);
 	const split = acct.split('@', 2);
 	return { username: split[0], host: split[1] || null };
 }