diff --git a/.stylelintrc.js b/.stylelintrc.js
index 290cbe75..c79d5b56 100644
--- a/.stylelintrc.js
+++ b/.stylelintrc.js
@@ -14,7 +14,7 @@ module.exports = {
       // extending the kebab-case to accept ConverseJS class names.
       '^([a-z][a-z0-9]*)(-[a-z0-9]+)*((__|--)[a-z]+(-[a-z0-9]+)*)?$',
       {
-        message: 'Expected class selector to be kebab-case, or ConverseJS-style.',
+        message: 'Expected class selector to be kebab-case, or ConverseJS-style.'
       }
     ]
   }
diff --git a/client/admin-plugin-client-plugin.ts b/client/admin-plugin-client-plugin.ts
index 7b0f872b..3d4f719f 100644
--- a/client/admin-plugin-client-plugin.ts
+++ b/client/admin-plugin-client-plugin.ts
@@ -243,7 +243,10 @@ function register (clientOptions: RegisterClientOptions): void {
             }
           } catch (error: any) {
             console.error(error)
-            peertubeHelpers.notifier.error(error.toString(), await peertubeHelpers.translate(LOC_LOADING_ERROR))
+            peertubeHelpers.notifier.error(
+              (error as Error).toString(),
+              await peertubeHelpers.translate(LOC_LOADING_ERROR)
+            )
           }
         }
       })
diff --git a/client/common-client-plugin.ts b/client/common-client-plugin.ts
index af7e1d46..05b4bc2c 100644
--- a/client/common-client-plugin.ts
+++ b/client/common-client-plugin.ts
@@ -46,7 +46,7 @@ async function register (clientOptions: RegisterClientOptions): Promise<void> {
   ])
   const webchatFieldOptions: RegisterClientFormFieldOptions = {
     name: 'livechat-active',
-    label: label,
+    label,
     descriptionHTML: description,
     type: 'input-checkbox',
     default: true,
diff --git a/client/common/admin/firewall/elements/admin-firewall.ts b/client/common/admin/firewall/elements/admin-firewall.ts
index aba28c90..067193f9 100644
--- a/client/common/admin/firewall/elements/admin-firewall.ts
+++ b/client/common/admin/firewall/elements/admin-firewall.ts
@@ -22,7 +22,7 @@ export class AdminFirewallElement extends LivechatElement {
   public validationError?: ValidationError
 
   @state()
-  public actionDisabled: boolean = false
+  public actionDisabled = false
 
   private _asyncTaskRender: Task
 
@@ -101,7 +101,7 @@ export class AdminFirewallElement extends LivechatElement {
       })
   }
 
-  public readonly getInputValidationClass = (propertyName: string): { [key: string]: boolean } => {
+  public readonly getInputValidationClass = (propertyName: string): Record<string, boolean> => {
     const validationErrorTypes: ValidationErrorType[] | undefined =
       this.validationError?.properties[`${propertyName}`]
     return validationErrorTypes ? (validationErrorTypes.length ? { 'is-invalid': true } : { 'is-valid': true }) : {}
diff --git a/client/common/admin/firewall/templates/admin-firewall.ts b/client/common/admin/firewall/templates/admin-firewall.ts
index ffa430c9..46a266d8 100644
--- a/client/common/admin/firewall/templates/admin-firewall.ts
+++ b/client/common/admin/firewall/templates/admin-firewall.ts
@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import type { AdminFirewallElement } from '../elements/admin-firewall'
 import type { TemplateResult } from 'lit'
 import type { DynamicFormHeader, DynamicFormSchema } from '../../../lib/elements/dynamic-table-form'
diff --git a/client/common/configuration/elements/channel-configuration.ts b/client/common/configuration/elements/channel-configuration.ts
index 7e6edd66..01c5f812 100644
--- a/client/common/configuration/elements/channel-configuration.ts
+++ b/client/common/configuration/elements/channel-configuration.ts
@@ -32,7 +32,7 @@ export class ChannelConfigurationElement extends LivechatElement {
   public validationError?: ValidationError
 
   @state()
-  public actionDisabled: boolean = false
+  public actionDisabled = false
 
   private _asyncTaskRender: Task
 
@@ -113,7 +113,7 @@ export class ChannelConfigurationElement extends LivechatElement {
     }
   }
 
-  public readonly getInputValidationClass = (propertyName: string): { [key: string]: boolean } => {
+  public readonly getInputValidationClass = (propertyName: string): Record<string, boolean> => {
     const validationErrorTypes: ValidationErrorType[] | undefined =
       this.validationError?.properties[`${propertyName}`]
     return validationErrorTypes ? (validationErrorTypes.length ? { 'is-invalid': true } : { 'is-valid': true }) : {}
diff --git a/client/common/configuration/elements/channel-emojis.ts b/client/common/configuration/elements/channel-emojis.ts
index e7e09de8..d6957153 100644
--- a/client/common/configuration/elements/channel-emojis.ts
+++ b/client/common/configuration/elements/channel-emojis.ts
@@ -30,7 +30,7 @@ export class ChannelEmojisElement extends LivechatElement {
   public validationError?: ValidationError
 
   @state()
-  public actionDisabled: boolean = false
+  public actionDisabled = false
 
   private _asyncTaskRender: Task
 
@@ -192,7 +192,7 @@ export class ChannelEmojisElement extends LivechatElement {
           throw new Error('Invalid data')
         }
 
-        const url = await this._convertImageToDataUrl(entry.url)
+        const url = await this._convertImageToDataUrl(entry.url as string)
         const sn = entry.sn as string
 
         const item: ChannelEmojisConfiguration['emojis']['customEmojis'][0] = {
@@ -211,7 +211,7 @@ export class ChannelEmojisElement extends LivechatElement {
         await this.ptTranslate(LOC_ACTION_IMPORT_EMOJIS_INFO)
       )
     } catch (err: any) {
-      this.ptNotifier.error(err.toString(), await this.ptTranslate(LOC_ERROR))
+      this.ptNotifier.error((err as Error).toString(), await this.ptTranslate(LOC_ERROR))
     } finally {
       this.actionDisabled = false
     }
@@ -250,7 +250,7 @@ export class ChannelEmojisElement extends LivechatElement {
       a.remove()
     } catch (err: any) {
       this.logger.error(err)
-      this.ptNotifier.error(err.toString())
+      this.ptNotifier.error((err as Error).toString())
     } finally {
       this.actionDisabled = false
     }
diff --git a/client/common/configuration/elements/channel-home.ts b/client/common/configuration/elements/channel-home.ts
index 0a861ccc..e66c2b69 100644
--- a/client/common/configuration/elements/channel-home.ts
+++ b/client/common/configuration/elements/channel-home.ts
@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import { html } from 'lit'
 import { customElement, state } from 'lit/decorators.js'
 import { ptTr } from '../../lib/directives/translation'
diff --git a/client/common/configuration/elements/channel-tabs.ts b/client/common/configuration/elements/channel-tabs.ts
index 2470a315..ab31f80e 100644
--- a/client/common/configuration/elements/channel-tabs.ts
+++ b/client/common/configuration/elements/channel-tabs.ts
@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import { LivechatElement } from '../../lib/elements/livechat'
 import { ptTr } from '../../lib/directives/translation'
 import { html, TemplateResult } from 'lit'
diff --git a/client/common/configuration/elements/templates/channel-configuration.ts b/client/common/configuration/elements/templates/channel-configuration.ts
index 33453a4c..ecae85a3 100644
--- a/client/common/configuration/elements/templates/channel-configuration.ts
+++ b/client/common/configuration/elements/templates/channel-configuration.ts
@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import type { ChannelConfigurationElement } from '../channel-configuration'
 import type { DynamicFormHeader, DynamicFormSchema } from '../../../lib/elements/dynamic-table-form'
 import { ptTr } from '../../../lib/directives/translation'
@@ -9,7 +12,7 @@ import { html, TemplateResult } from 'lit'
 import { classMap } from 'lit/directives/class-map.js'
 
 export function tplChannelConfiguration (el: ChannelConfigurationElement): TemplateResult {
-  const tableHeaderList: {[key: string]: DynamicFormHeader} = {
+  const tableHeaderList: Record<string, DynamicFormHeader> = {
     forbiddenWords: {
       entries: {
         colName: ptTr(LOC_LIVECHAT_CONFIGURATION_CHANNEL_FORBIDDEN_WORDS_LABEL),
@@ -57,7 +60,7 @@ export function tplChannelConfiguration (el: ChannelConfigurationElement): Templ
       }
     }
   }
-  const tableSchema: {[key: string]: DynamicFormSchema} = {
+  const tableSchema: Record<string, DynamicFormSchema> = {
     forbiddenWords: {
       entries: {
         inputType: 'tags',
diff --git a/client/common/configuration/elements/templates/channel-emojis.ts b/client/common/configuration/elements/templates/channel-emojis.ts
index ae354500..8984f8ab 100644
--- a/client/common/configuration/elements/templates/channel-emojis.ts
+++ b/client/common/configuration/elements/templates/channel-emojis.ts
@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import type { ChannelEmojisElement } from '../channel-emojis'
 import type { DynamicFormHeader, DynamicFormSchema } from '../../../lib/elements/dynamic-table-form'
 import { maxEmojisPerChannel } from 'shared/lib/emojis'
diff --git a/client/common/configuration/services/channel-details.ts b/client/common/configuration/services/channel-details.ts
index 4c1695a7..21d3e5fd 100644
--- a/client/common/configuration/services/channel-details.ts
+++ b/client/common/configuration/services/channel-details.ts
@@ -162,7 +162,8 @@ export class ChannelDetailsService {
     }
 
     for (const channel of channels.data) {
-      channel.livechatConfigurationUri = '/p/livechat/configuration/channel?channelId=' + encodeURIComponent(channel.id)
+      channel.livechatConfigurationUri =
+        '/p/livechat/configuration/channel?channelId=' + encodeURIComponent(channel.id as string | number)
 
       // Note: since Peertube v6.0.0, channel.avatar is dropped, and we have to use channel.avatars.
       // So, if !channel.avatar, we will search a suitable one in channel.avatars, and fill channel.avatar.
@@ -196,10 +197,11 @@ export class ChannelDetailsService {
   }
 
   public async fetchEmojisConfiguration (channelId: number): Promise<ChannelEmojisConfiguration> {
+    const url = getBaseRoute(this._registerClientOptions) +
+      '/api/configuration/channel/emojis/' +
+      encodeURIComponent(channelId)
     const response = await fetch(
-      getBaseRoute(this._registerClientOptions) +
-        '/api/configuration/channel/emojis/' +
-        encodeURIComponent(channelId),
+      url,
       {
         method: 'GET',
         headers: this._headers
@@ -311,10 +313,11 @@ export class ChannelDetailsService {
     channelId: number,
     channelEmojis: ChannelEmojis
   ): Promise<ChannelEmojisConfiguration> {
+    const url = getBaseRoute(this._registerClientOptions) +
+      '/api/configuration/channel/emojis/' +
+      encodeURIComponent(channelId)
     const response = await fetch(
-      getBaseRoute(this._registerClientOptions) +
-        '/api/configuration/channel/emojis/' +
-        encodeURIComponent(channelId),
+      url,
       {
         method: 'POST',
         headers: this._headers,
@@ -330,11 +333,12 @@ export class ChannelDetailsService {
   }
 
   public async enableEmojisOnlyModeOnAllRooms (channelId: number): Promise<void> {
+    const url = getBaseRoute(this._registerClientOptions) +
+      '/api/configuration/channel/emojis/' +
+      encodeURIComponent(channelId) +
+      '/enable_emoji_only'
     const response = await fetch(
-      getBaseRoute(this._registerClientOptions) +
-        '/api/configuration/channel/emojis/' +
-        encodeURIComponent(channelId) +
-        '/enable_emoji_only',
+      url,
       {
         method: 'POST',
         headers: this._headers
diff --git a/client/common/lib/buttons.ts b/client/common/lib/buttons.ts
index 0cf9e11d..a51e8dff 100644
--- a/client/common/lib/buttons.ts
+++ b/client/common/lib/buttons.ts
@@ -4,7 +4,7 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 // This content comes from the file assets/images/plus-square.svg, from the Feather icons set https://feathericons.com/
-export const AddSVG: string =
+export const AddSVG =
   `<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"
   aria-hidden="true"
   fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
@@ -14,7 +14,7 @@ export const AddSVG: string =
   </svg>`
 
 // This content comes from the file assets/images/x-square.svg, from the Feather icons set https://feathericons.com/
-export const RemoveSVG: string =
+export const RemoveSVG =
   `<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"
   aria-hidden="true"
   fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
diff --git a/client/common/lib/directives/translation.ts b/client/common/lib/directives/translation.ts
index acfa96f4..5baac6ae 100644
--- a/client/common/lib/directives/translation.ts
+++ b/client/common/lib/directives/translation.ts
@@ -13,8 +13,8 @@ import { getPtContext } from '../contexts/peertube'
 export class TranslationDirective extends AsyncDirective {
   private readonly _peertubeHelpers: RegisterClientHelpers
 
-  private _translatedValue: string = ''
-  private _localizationId: string = ''
+  private _translatedValue = ''
+  private _localizationId = ''
 
   private _allowUnsafeHTML = false
 
@@ -25,7 +25,7 @@ export class TranslationDirective extends AsyncDirective {
     this._asyncUpdateTranslation().then(() => {}, () => {})
   }
 
-  public override render = (locId: string, allowHTML: boolean = false): TemplateResult | string => {
+  public override render = (locId: string, allowHTML = false): TemplateResult | string => {
     this._localizationId = locId // TODO Check current component for context (to infer the prefix)
 
     this._allowUnsafeHTML = allowHTML
diff --git a/client/common/lib/elements/configuration-section-header.ts b/client/common/lib/elements/configuration-section-header.ts
index 4ef36f29..6c99b934 100644
--- a/client/common/lib/elements/configuration-section-header.ts
+++ b/client/common/lib/elements/configuration-section-header.ts
@@ -3,6 +3,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import { ptTr } from '../directives/translation'
 import { html } from 'lit'
 import { customElement, property } from 'lit/decorators.js'
diff --git a/client/common/lib/elements/dynamic-table-form.ts b/client/common/lib/elements/dynamic-table-form.ts
index 93436e03..c0a2311d 100644
--- a/client/common/lib/elements/dynamic-table-form.ts
+++ b/client/common/lib/elements/dynamic-table-form.ts
@@ -3,6 +3,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import type { TagsInputElement } from './tags-input'
 import type { DirectiveResult } from 'lit/directive'
 import { ValidationErrorType } from '../models/validation'
@@ -20,26 +23,26 @@ import { AddSVG, RemoveSVG } from '../buttons'
 type DynamicTableAcceptedTypes = number | string | boolean | Date | Array<number | string>
 
 type DynamicTableAcceptedInputTypes = 'textarea'
-| 'select'
-| 'checkbox'
-| 'range'
-| 'color'
-| 'date'
-| 'datetime'
-| 'datetime-local'
-| 'email'
-| 'file'
-| 'image'
-| 'month'
-| 'number'
-| 'password'
-| 'tel'
-| 'text'
-| 'time'
-| 'url'
-| 'week'
-| 'tags'
-| 'image-file'
+  | 'select'
+  | 'checkbox'
+  | 'range'
+  | 'color'
+  | 'date'
+  | 'datetime'
+  | 'datetime-local'
+  | 'email'
+  | 'file'
+  | 'image'
+  | 'month'
+  | 'number'
+  | 'password'
+  | 'tel'
+  | 'text'
+  | 'time'
+  | 'url'
+  | 'week'
+  | 'tags'
+  | 'image-file'
 
 interface CellDataSchema {
   min?: number
@@ -47,7 +50,7 @@ interface CellDataSchema {
   minlength?: number
   maxlength?: number
   size?: number
-  options?: { [key: string]: string }
+  options?: Record<string, string>
   datalist?: DynamicTableAcceptedTypes[]
   separator?: string
   inputType?: DynamicTableAcceptedInputTypes
@@ -59,7 +62,7 @@ interface CellDataSchema {
 interface DynamicTableRowData {
   _id: number
   _originalIndex: number
-  row: { [key: string]: DynamicTableAcceptedTypes }
+  row: Record<string, DynamicTableAcceptedTypes>
 }
 
 interface DynamicFormHeaderCellData {
@@ -68,10 +71,8 @@ interface DynamicFormHeaderCellData {
   headerClassList?: string[]
 }
 
-export interface DynamicFormHeader {
-  [key: string]: DynamicFormHeaderCellData
-}
-export interface DynamicFormSchema { [key: string]: CellDataSchema }
+export type DynamicFormHeader = Record<string, DynamicFormHeaderCellData>
+export type DynamicFormSchema = Record<string, CellDataSchema>
 
 @customElement('livechat-dynamic-table-form')
 export class DynamicTableFormElement extends LivechatElement {
@@ -85,19 +86,19 @@ export class DynamicTableFormElement extends LivechatElement {
   public maxLines?: number = undefined
 
   @property()
-  public validation?: {[key: string]: ValidationErrorType[] }
+  public validation?: Record<string, ValidationErrorType[]>
 
   @property({ attribute: false })
-  public validationPrefix: string = ''
+  public validationPrefix = ''
 
   @property({ attribute: false })
-  public rows: Array<{ [key: string]: DynamicTableAcceptedTypes }> = []
+  public rows: Array<Record<string, DynamicTableAcceptedTypes>> = []
 
   @state()
   public _rowsById: DynamicTableRowData[] = []
 
   @property({ attribute: false })
-  public formName: string = ''
+  public formName = ''
 
   @state()
   private _lastRowId = 1
@@ -112,7 +113,7 @@ export class DynamicTableFormElement extends LivechatElement {
     }
   }
 
-  private readonly _getDefaultRow = (): { [key: string]: DynamicTableAcceptedTypes } => {
+  private readonly _getDefaultRow = (): Record<string, DynamicTableAcceptedTypes> => {
     this._updateLastRowId()
     return Object.fromEntries([...Object.entries(this.schema).map((entry) => [entry[0], entry[1].default ?? ''])])
   }
@@ -245,11 +246,11 @@ export class DynamicTableFormElement extends LivechatElement {
 
     return html`<tr id=${inputId}>
       ${Object.keys(this.header)
-              .sort((k1, k2) => this.columnOrder.indexOf(k1) - this.columnOrder.indexOf(k2))
-              .map(key => this.renderDataCell(key,
-              rowData.row[key] ?? this.schema[key].default,
-              rowData._id,
-              rowData._originalIndex))}
+        .sort((k1, k2) => this.columnOrder.indexOf(k1) - this.columnOrder.indexOf(k2))
+        .map(key => this.renderDataCell(key,
+        rowData.row[key] ?? this.schema[key].default,
+        rowData._id,
+        rowData._originalIndex))}
       <td class="form-group">
         <button type="button"
           class="dynamic-table-remove-row"
@@ -457,8 +458,7 @@ export class DynamicTableFormElement extends LivechatElement {
               inputTitle,
               propertyName,
               propertySchema,
-              (propertyValue)?.join(propertySchema.separator ?? ',') ??
-                propertyValue ?? propertySchema.default ?? '',
+              (propertyValue)?.join(propertySchema.separator ?? ',') ?? propertyValue ?? propertySchema.default ?? '',
               originalIndex)}
               ${feedback}
               `
@@ -473,8 +473,7 @@ export class DynamicTableFormElement extends LivechatElement {
               inputTitle,
               propertyName,
               propertySchema,
-              (propertyValue)?.join(propertySchema.separator ?? ',') ??
-                propertyValue ?? propertySchema.default ?? '',
+              (propertyValue)?.join(propertySchema.separator ?? ',') ?? propertyValue ?? propertySchema.default ?? '',
               originalIndex)}
               ${feedback}
               `
@@ -498,8 +497,10 @@ export class DynamicTableFormElement extends LivechatElement {
     }
 
     if (!formElement) {
-      this.logger.warn(`value type '${(propertyValue.constructor.toString())}' is incompatible` +
-        `with field type '${propertySchema.inputType as string}' for form entry '${propertyName.toString()}'.`)
+      this.logger.warn(
+        `value type '${(propertyValue.constructor.toString())}' is incompatible` +
+        `with field type '${propertySchema.inputType as string}' for form entry '${propertyName.toString()}'.`
+      )
     }
 
     const classList = ['form-group']
@@ -678,7 +679,7 @@ export class DynamicTableFormElement extends LivechatElement {
   }
 
   _getInputValidationClass = (propertyName: string,
-    originalIndex: number): { [key: string]: boolean } => {
+    originalIndex: number): Record<string, boolean> => {
     const validationErrorTypes: ValidationErrorType[] | undefined =
       this.validation?.[`${this.validationPrefix}.${originalIndex}.${propertyName}`]
 
diff --git a/client/common/lib/elements/help-button.ts b/client/common/lib/elements/help-button.ts
index 98e06d94..3ee42165 100644
--- a/client/common/lib/elements/help-button.ts
+++ b/client/common/lib/elements/help-button.ts
@@ -18,7 +18,7 @@ export class HelpButtonElement extends LivechatElement {
   public buttonTitle: string | DirectiveResult = ptTr(LOC_ONLINE_HELP)
 
   @property({ attribute: false })
-  public page: string = ''
+  public page = ''
 
   @state()
   public url: URL = new URL('https://lmddgtfy.net/')
diff --git a/client/common/lib/elements/image-file-input.ts b/client/common/lib/elements/image-file-input.ts
index 6c6a528d..02f1a150 100644
--- a/client/common/lib/elements/image-file-input.ts
+++ b/client/common/lib/elements/image-file-input.ts
@@ -1,6 +1,10 @@
 // SPDX-FileCopyrightText: 2024 John Livingston <https://www.john-livingston.fr/>
 //
 // SPDX-License-Identifier: AGPL-3.0-only
+
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import { LivechatElement } from './livechat'
 import { html } from 'lit'
 import type { DirectiveResult } from 'lit/directive'
diff --git a/client/common/lib/elements/tags-input.ts b/client/common/lib/elements/tags-input.ts
index f505e3ba..9f8b6666 100644
--- a/client/common/lib/elements/tags-input.ts
+++ b/client/common/lib/elements/tags-input.ts
@@ -3,6 +3,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import { LivechatElement } from './livechat'
 import { ptTr } from '../directives/translation'
 import { html } from 'lit'
@@ -21,10 +24,11 @@ import type { DirectiveResult } from 'lit/directive'
 // Then replace the main color by «currentColor»
 const copySVG = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 4.233 4.233">
   <g style="stroke-width:1.00021;stroke-miterlimit:4;stroke-dasharray:none">` +
-    // eslint-disable-next-line max-len
+    // eslint-disable-next-line max-len, @stylistic/indent-binary-ops
     '<path style="opacity:.998;fill:none;fill-opacity:1;stroke:currentColor;stroke-width:1.17052;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" d="m4.084 4.046-.616.015-.645-.004a.942.942 0 0 1-.942-.942v-4.398a.94.94 0 0 1 .942-.943H7.22a.94.94 0 0 1 .942.943l-.006.334-.08.962" transform="matrix(.45208 0 0 .45208 -.528 1.295)"/>' +
     // eslint-disable-next-line max-len
     '<path style="opacity:.998;fill:none;fill-opacity:1;stroke:currentColor;stroke-width:1.17052;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" d="M8.434 5.85c-.422.009-1.338.009-1.76.01-.733.004-2.199 0-2.199 0a.94.94 0 0 1-.942-.941V.52a.94.94 0 0 1 .942-.942h4.398a.94.94 0 0 1 .943.942s.004 1.466 0 2.2c-.003.418-.019 1.251-.006 1.67.024.812-.382 1.439-1.376 1.46z" transform="matrix(.45208 0 0 .45208 -.528 1.295)"/>' +
+  // eslint-disable-next-line @stylistic/indent-binary-ops
   `</g>
 </svg>`
 
@@ -64,10 +68,10 @@ export class TagsInputElement extends LivechatElement {
   private readonly _isPressingKey: string[] = []
 
   @property({ attribute: false })
-  public separator: string = '\n'
+  public separator = '\n'
 
   @property({ attribute: false })
-  public animDuration: number = 200
+  public animDuration = 200
 
   /**
    * Overloading the standard focus method.
@@ -245,8 +249,9 @@ export class TagsInputElement extends LivechatElement {
           if (!this._isPressingKey.includes(e.key)) {
             this._isPressingKey.push(e.key)
 
-            if ((target.selectionStart === target.selectionEnd) &&
-                 target.selectionStart === 0) {
+            if (
+              (target.selectionStart === target.selectionEnd) && target.selectionStart === 0
+            ) {
               this._handleDeleteTag((this._searchedTagsIndex.length)
                 ? this._searchedTagsIndex.slice(-1)[0]
                 : (this.value.length - 1))
@@ -259,8 +264,9 @@ export class TagsInputElement extends LivechatElement {
           if (!this._isPressingKey.includes(e.key)) {
             this._isPressingKey.push(e.key)
 
-            if ((target.selectionStart === target.selectionEnd) &&
-                 target.selectionStart === target.value.length) {
+            if (
+              (target.selectionStart === target.selectionEnd) && target.selectionStart === target.value.length
+            ) {
               this._handleDeleteTag((this._searchedTagsIndex.length)
                 ? this._searchedTagsIndex[0]
                 : 0)
diff --git a/client/common/lib/elements/templates/token-list.ts b/client/common/lib/elements/templates/token-list.ts
index 9ac92110..cb55ba69 100644
--- a/client/common/lib/elements/templates/token-list.ts
+++ b/client/common/lib/elements/templates/token-list.ts
@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import type { LivechatTokenListElement } from '../token-list'
 import { html, TemplateResult } from 'lit'
 import { unsafeHTML } from 'lit/directives/unsafe-html.js'
@@ -23,11 +26,11 @@ export function tplTokenList (el: LivechatTokenListElement): TemplateResult {
       <tbody>
         ${
           repeat(el.tokenList ?? [], (token) => token.id, (token) => {
-            let dateStr: string = ''
+            let dateStr = ''
             try {
               const date = new Date(token.date)
               dateStr = date.toLocaleDateString() + ' ' + date.toLocaleTimeString()
-            } catch (err) {}
+            } catch (_err) {}
             return html`<tr>
               <td>${
                 el.mode === 'select'
diff --git a/client/common/lib/elements/token-list.ts b/client/common/lib/elements/token-list.ts
index c315d5bd..79ebbcf5 100644
--- a/client/common/lib/elements/token-list.ts
+++ b/client/common/lib/elements/token-list.ts
@@ -27,7 +27,7 @@ export class LivechatTokenListElement extends LivechatElement {
   public currentSelectedToken?: LivechatToken
 
   @property({ attribute: false })
-  public actionDisabled: boolean = false
+  public actionDisabled = false
 
   private readonly _tokenListService: TokenListService
   private readonly _asyncTaskRender: Task
@@ -83,7 +83,7 @@ export class LivechatTokenListElement extends LivechatElement {
       this.dispatchEvent(new CustomEvent('update', {}))
     } catch (err: any) {
       this.logger.error(err)
-      this.ptNotifier.error(err.toString(), await this.ptTranslate(LOC_ERROR))
+      this.ptNotifier.error((err as Error).toString(), await this.ptTranslate(LOC_ERROR))
     } finally {
       this.actionDisabled = false
     }
@@ -102,7 +102,7 @@ export class LivechatTokenListElement extends LivechatElement {
       this.dispatchEvent(new CustomEvent('update', {}))
     } catch (err: any) {
       this.logger.error(err)
-      this.ptNotifier.error(err.toString(), await this.ptTranslate(LOC_ERROR))
+      this.ptNotifier.error((err as Error).toString(), await this.ptTranslate(LOC_ERROR))
     } finally {
       this.actionDisabled = false
     }
diff --git a/client/common/lib/models/validation.ts b/client/common/lib/models/validation.ts
index b034b693..8dfe9348 100644
--- a/client/common/lib/models/validation.ts
+++ b/client/common/lib/models/validation.ts
@@ -12,7 +12,7 @@ export enum ValidationErrorType {
 }
 
 export class ValidationError extends Error {
-  properties: {[key: string]: ValidationErrorType[] } = {}
+  properties: Record<string, ValidationErrorType[]> = {}
 
   constructor (name: string, message: string | undefined, properties: ValidationError['properties']) {
     super(message)
diff --git a/client/common/videowatch/chat.ts b/client/common/videowatch/chat.ts
index 6c7d8f61..7521dbfd 100644
--- a/client/common/videowatch/chat.ts
+++ b/client/common/videowatch/chat.ts
@@ -60,8 +60,8 @@ async function initChat (video: Video): Promise<void> {
       return
     }
 
-    let showShareUrlButton: boolean = false
-    let showPromote: boolean = false
+    let showShareUrlButton = false
+    let showPromote = false
     if (video.isLocal) { // No need for shareButton on remote chats.
       const chatShareUrl = settings['chat-share-url'] ?? ''
       if (chatShareUrl === 'everyone') {
@@ -187,9 +187,10 @@ async function _insertChatDom (
           callback: async () => {
             try {
               // First we must get the room JID (can be video.uuid@ or channel.id@)
+              const url = getBaseRoute(ptContext.ptOptions) + '/api/configuration/room/' +
+                encodeURIComponent(video.uuid)
               const response = await fetch(
-                getBaseRoute(ptContext.ptOptions) + '/api/configuration/room/' +
-                  encodeURIComponent(video.uuid),
+                url,
                 {
                   method: 'GET',
                   headers: peertubeHelpers.getAuthHeader()
@@ -303,7 +304,7 @@ async function _openChat (video: Video): Promise<void | false> {
 
     // Loading converseJS...
     await displayConverseJS(ptContext.ptOptions, container, roomkey, 'peertube-video', false)
-  } catch (err) {
+  } catch (_err) {
     // Displaying an error page.
     if (container) {
       const message = document.createElement('div')
diff --git a/client/common/videowatch/elements/share-chat.ts b/client/common/videowatch/elements/share-chat.ts
index 3f60eccd..2f4d41b6 100644
--- a/client/common/videowatch/elements/share-chat.ts
+++ b/client/common/videowatch/elements/share-chat.ts
@@ -14,7 +14,7 @@ import { getIframeUri, getXMPPAddr, UriOptions } from '../uri'
 import { isAnonymousUser } from '../../../utils/user'
 
 // First is default tab.
-const validTabNames = ['embed', 'dock', 'peertube', 'xmpp'] as const
+const validTabNames: string[] = ['embed', 'dock', 'peertube', 'xmpp'] as const
 
 type ValidTabNames = typeof validTabNames[number]
 
@@ -61,49 +61,49 @@ export class ShareChatElement extends LivechatElement {
    * Should we render the XMPP tab?
    */
   @property({ attribute: false })
-  public xmppUriEnabled: boolean = false
+  public xmppUriEnabled = false
 
   /**
    * Should we render the Dock tab?
    */
   @property({ attribute: false })
-  public dockEnabled: boolean = false
+  public dockEnabled = false
 
   /**
    * Can we use autocolors?
    */
   @property({ attribute: false })
-  public autocolorsAvailable: boolean = false
+  public autocolorsAvailable = false
 
   /**
    * In the Embed tab, should we generated an iframe link.
    */
   @property({ attribute: false })
-  public embedIFrame: boolean = false
+  public embedIFrame = false
 
   /**
    * In the Embed tab, should we generated a read-only chat link.
    */
   @property({ attribute: false })
-  public embedReadOnly: boolean = false
+  public embedReadOnly = false
 
   /**
    * Read-only, with scrollbar?
    */
   @property({ attribute: false })
-  public embedReadOnlyScrollbar: boolean = false
+  public embedReadOnlyScrollbar = false
 
   /**
    * Read-only, transparent background?
    */
   @property({ attribute: false })
-  public embedReadOnlyTransparentBackground: boolean = false
+  public embedReadOnlyTransparentBackground = false
 
   /**
    * In the Embed tab, should we use current theme color?
    */
   @property({ attribute: false })
-  public embedAutocolors: boolean = false
+  public embedAutocolors = false
 
   protected override firstUpdated (changedProperties: PropertyValues): void {
     super.firstUpdated(changedProperties)
@@ -156,7 +156,7 @@ export class ShareChatElement extends LivechatElement {
         return
       }
       this.logger.log('Restoring previous state')
-      if (validTabNames.includes(v.currentTab)) {
+      if (validTabNames.includes(v.currentTab as string)) {
         this.currentTab = v.currentTab
       }
       this.embedIFrame = !!v.embedIFrame
diff --git a/client/common/videowatch/elements/templates/share-chat.ts b/client/common/videowatch/elements/templates/share-chat.ts
index 3ecefa26..8aadc4dc 100644
--- a/client/common/videowatch/elements/templates/share-chat.ts
+++ b/client/common/videowatch/elements/templates/share-chat.ts
@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME: @stylistic/indent is buggy with strings literrals.
+/* eslint-disable @stylistic/indent */
+
 import type { ShareChatElement } from '../share-chat'
 import { html, TemplateResult } from 'lit'
 import { ptTr } from '../../../lib/directives/translation'
diff --git a/client/common/videowatch/share.ts b/client/common/videowatch/share.ts
index c1a2c305..e73e69a9 100644
--- a/client/common/videowatch/share.ts
+++ b/client/common/videowatch/share.ts
@@ -71,8 +71,7 @@ async function shareChatUrl (
       addedNodes.forEach(node => {
         if ((node as HTMLElement).localName === 'ngb-modal-window') {
           logger.info('Detecting a new modal, checking if this is the good one...')
-          if (!(node as HTMLElement).querySelector) { return }
-          const title = (node as HTMLElement).querySelector('.modal-title')
+          const title = (node as HTMLElement).querySelector?.('.modal-title')
           if (!(title?.textContent === labelShare)) {
             return
           }
diff --git a/client/common/videowatch/uri.ts b/client/common/videowatch/uri.ts
index b130df25..d35c6425 100644
--- a/client/common/videowatch/uri.ts
+++ b/client/common/videowatch/uri.ts
@@ -4,6 +4,7 @@
 
 import type { RegisterClientOptions } from '@peertube/peertube-types/client'
 import type { Video } from '@peertube/peertube-types'
+import type { LiveChatSettings } from '../lib/contexts/peertube'
 import { AutoColors, isAutoColorsAvailable } from 'shared/lib/autocolors'
 import { getBaseRoute } from '../../utils/uri'
 import { logger } from '../../utils/logger'
@@ -17,7 +18,7 @@ interface UriOptions {
 }
 
 function getIframeUri (
-  registerOptions: RegisterClientOptions, settings: any, video: Video, uriOptions: UriOptions = {}
+  registerOptions: RegisterClientOptions, settings: LiveChatSettings, video: Video, uriOptions: UriOptions = {}
 ): string | null {
   if (!settings) {
     logger.error('Settings are not initialized, too soon to compute the iframeUri')
diff --git a/client/settings.ts b/client/settings.ts
index 1d6a39ef..ccfdd28c 100644
--- a/client/settings.ts
+++ b/client/settings.ts
@@ -156,12 +156,12 @@ function launchTests (): void {
         'content-type': 'application/json;charset=UTF-8'
       }),
       body: JSON.stringify({
-        test: test
+        test
       })
     })
     if (!response.ok) {
       return {
-        test: test,
+        test,
         messages: [response.statusText ?? 'Unknown error'],
         ok: false
       }
@@ -169,7 +169,7 @@ function launchTests (): void {
     const data = await response.json()
     if ((typeof data) !== 'object') {
       return {
-        test: test,
+        test,
         messages: ['Incorrect reponse type: ' + (typeof data)],
         ok: false
       }
@@ -190,6 +190,7 @@ function launchTests (): void {
     waiting.innerHTML = '<i>Testing...</i>'
     ul.append(waiting)
     if ((typeof result.next) === 'function') {
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-function-type
       const r: Result = (result.next as Function)()
       waiting.remove()
       await machine(r)
diff --git a/client/utils/conversejs.ts b/client/utils/conversejs.ts
index 758e14ee..de7ca7d6 100644
--- a/client/utils/conversejs.ts
+++ b/client/utils/conversejs.ts
@@ -1,6 +1,7 @@
 // SPDX-FileCopyrightText: 2024 John Livingston <https://www.john-livingston.fr/>
 //
 // SPDX-License-Identifier: AGPL-3.0-only
+/* eslint-disable @typescript-eslint/no-unsafe-function-type */
 
 import type { RegisterClientOptions } from '@peertube/peertube-types/client'
 import type { InitConverseJSParams, ChatPeertubeIncludeMode } from 'shared/lib/types'
@@ -17,7 +18,7 @@ declare global {
   }
 }
 
-let pollListenerInitiliazed: boolean = false
+let pollListenerInitiliazed = false
 
 /**
  * load the ConverseJS CSS.
@@ -152,10 +153,11 @@ async function displayConverseJS (
 
   const authHeader = peertubeHelpers.getAuthHeader()
 
+  const url = getBaseRoute(clientOptions) + '/api/configuration/room/' +
+    encodeURIComponent(roomKey) +
+    (forceType ? '?forcetype=1' : '')
   const response = await fetch(
-    getBaseRoute(clientOptions) + '/api/configuration/room/' +
-      encodeURIComponent(roomKey) +
-      (forceType ? '?forcetype=1' : ''),
+    url,
     {
       method: 'GET',
       headers: authHeader
diff --git a/client/utils/uri.ts b/client/utils/uri.ts
index 600352ec..3def4c54 100644
--- a/client/utils/uri.ts
+++ b/client/utils/uri.ts
@@ -4,7 +4,7 @@
 
 import type { RegisterClientOptions } from '@peertube/peertube-types/client'
 
-function getBaseRoute ({ peertubeHelpers }: RegisterClientOptions, permanent: boolean = false): string {
+function getBaseRoute ({ peertubeHelpers }: RegisterClientOptions, permanent = false): string {
   if (permanent) {
     return '/plugins/livechat/router'
   }
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 91fa96de..aae805eb 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -2,23 +2,30 @@
 //
 // SPDX-License-Identifier: AGPL-3.0-only
 
+// FIXME:
+// * lint shared
+// * lint conversejs
+// * use eslint-plugin-lit
+
 import love from 'eslint-config-love'
 import eslint from '@eslint/js'
 import tseslint from 'typescript-eslint'
 import typescriptParser from '@typescript-eslint/parser'
 import stylistic from '@stylistic/eslint-plugin'
+import eslintLit from 'eslint-plugin-lit'
 import globals from 'globals'
 
 export default tseslint.config(
   {
     ignores: [
-      "node_modules/", "dist/", "webpack.config.js",
-      "build/",
-      "vendor/",
-      "support/documentation", "support",
-      "build-*js",
+      'node_modules/', 'dist/', 'webpack.config.js',
+      'build/',
+      'vendor/',
+      'support/documentation', 'support',
+      'build-*js',
 
-      "shared", "client", "conversejs"
+      'shared',
+      'conversejs'
     ]
   },
   eslint.configs.recommended,
@@ -27,48 +34,57 @@ export default tseslint.config(
     ...love,
     files: ['**/*.ts']
   },
+  stylistic.configs.customize({
+    quotes: 'single',
+    semi: false,
+    commaDangle: 'never',
+    blockSpacing: true,
+    braceStyle: '1tbs',
+    indent: 2,
+    quoteProps: 'as-needed'
+  }),
   {
-    plugins: {
-      '@stylistic': stylistic
-    },
     rules: {
-      "@stylistic/semi": ["error", "never"]
+      '@stylistic/space-before-function-paren': ['error', { anonymous: 'always', asyncArrow: 'always', named: 'always' }],
+      '@stylistic/arrow-parens': 'off',
+      '@stylistic/operator-linebreak': ['error', 'after', { overrides: { '?': 'before', ':': 'before' } }],
+      '@stylistic/max-statements-per-line': ['error', { max: 2 }]
     }
   },
   {
     files: ['**/*.ts'],
     rules: {
-      "@typescript-eslint/no-empty-function": ["error", {"allow": ["arrowFunctions"]}],
-      "@typescript-eslint/no-unused-vars": [2, {"argsIgnorePattern": "^_", "caughtErrorsIgnorePattern": "^_"}],
-      "@typescript-eslint/no-floating-promises": "error",
-      "@typescript-eslint/no-misused-promises": "error",
-      "@typescript-eslint/no-var-requires": "off",
-      "@typescript-eslint/strict-boolean-expressions": "off",
-      "@typescript-eslint/return-await": [2, "in-try-catch"], // FIXME: correct?
-      "@typescript-eslint/no-invalid-void-type": "off",
-      "@typescript-eslint/triple-slash-reference": "off",
-      "@typescript-eslint/no-explicit-any": "off", // FIXME: should be "error", and we should use 'unknown' in the code.
-      "init-declarations": "off",
-      "@typescript-eslint/init-declarations": "off",
-      "@typescript-eslint/consistent-type-imports": "off",
-      "@typescript-eslint/consistent-type-exports": "off",
-      "@typescript-eslint/no-require-imports": "off",
-      "@typescript-eslint/unbound-method": "off",
-      "@typescript-eslint/prefer-promise-reject-errors": "off",
-      "max-params": "off",
-      "@typescript-eslint/max-params": ["error", { "max": 8 }], // FIXME: this rules should use the default max value.
-      "@typescript-eslint/explicit-function-return-type": "error",
-      "@typescript-eslint/no-confusing-void-expression": "off",
-      "@typescript-eslint/class-methods-use-this": "off",
-      "@typescript-eslint/non-nullable-type-assertion-style": "off",
-      "max-len": [
-        "error",
+      '@typescript-eslint/no-empty-function': ['error', { allow: ['arrowFunctions'] }],
+      '@typescript-eslint/no-unused-vars': [2, { argsIgnorePattern: '^_', caughtErrorsIgnorePattern: '^_' }],
+      '@typescript-eslint/no-floating-promises': 'error',
+      '@typescript-eslint/no-misused-promises': ['error', { checksVoidReturn: false }],
+      '@typescript-eslint/no-var-requires': 'off',
+      '@typescript-eslint/strict-boolean-expressions': 'off',
+      '@typescript-eslint/return-await': [2, 'in-try-catch'], // FIXME: correct?
+      '@typescript-eslint/no-invalid-void-type': 'off',
+      '@typescript-eslint/triple-slash-reference': 'off',
+      '@typescript-eslint/no-explicit-any': 'off', // FIXME: should be "error", and we should use 'unknown' in the code.
+      'init-declarations': 'off',
+      '@typescript-eslint/init-declarations': 'off',
+      '@typescript-eslint/consistent-type-imports': 'off',
+      '@typescript-eslint/consistent-type-exports': 'off',
+      '@typescript-eslint/no-require-imports': 'off',
+      '@typescript-eslint/unbound-method': 'off',
+      '@typescript-eslint/prefer-promise-reject-errors': 'off',
+      'max-params': 'off',
+      '@typescript-eslint/max-params': ['error', { max: 8 }], // FIXME: this rules should use the default max value.
+      '@typescript-eslint/explicit-function-return-type': 'error',
+      '@typescript-eslint/no-confusing-void-expression': 'off',
+      '@typescript-eslint/class-methods-use-this': 'off',
+      '@typescript-eslint/non-nullable-type-assertion-style': 'off',
+      'max-len': [
+        'error',
         {
-          "code": 120,
-          "comments": 120
+          code: 120,
+          comments: 120
         }
       ],
-      "no-unused-vars": "off"
+      'no-unused-vars': 'off'
     }
   },
   {
@@ -90,5 +106,48 @@ export default tseslint.config(
         project: './server/tsconfig.json'
       }
     }
+  },
+  {
+    files: ['shared/**/*.js', 'shared/**/*.ts'], // only ts?
+    languageOptions: {
+      ecmaVersion: 6,
+      globals: {
+        ...globals.es2016,
+        ...globals.browser
+      },
+      parser: typescriptParser,
+      parserOptions: {
+        ecmaVersion: 2018,
+        project: [
+          './server/tsconfig.json',
+          './client/tsconfig.json'
+        ],
+        projectService: {
+          allowDefaultProject: 'shared/**/*.ts',
+          defaultProject: './server/tsconfig.json'
+        }
+      }
+    }
+  },
+  {
+    files: ['client/**/*.js', 'client/**/*.ts'], // only ts?
+    languageOptions: {
+      ecmaVersion: 6,
+      globals: {
+        ...globals.browser
+      },
+      parser: typescriptParser,
+      parserOptions: {
+        ecmaVersion: 2018,
+        project: './client/tsconfig.json'
+      }
+    },
+    // FIXME: not sure elintLit works.
+    plugins: {
+      ...eslintLit.configs['flat/recommended'].plugins
+    },
+    rules: {
+      ...eslintLit.configs['flat/recommended'].rules
+    }
   }
 )
diff --git a/package-lock.json b/package-lock.json
index 6579078e..6ceac724 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -43,6 +43,7 @@
         "esbuild": "^0.16.1",
         "eslint": "^8.57.0",
         "eslint-config-love": "^64.0.0",
+        "eslint-plugin-lit": "^1.15.0",
         "globals": "^15.9.0",
         "lit": "^2.4.0",
         "lit-analyzer": "^1.2.1",
@@ -7045,6 +7046,23 @@
         "semver": "bin/semver.js"
       }
     },
+    "node_modules/eslint-plugin-lit": {
+      "version": "1.15.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-lit/-/eslint-plugin-lit-1.15.0.tgz",
+      "integrity": "sha512-Yhr2MYNz6Ln8megKcX503aVZQln8wsywCG49g0heiJ/Qr5UjkE4pGr4Usez2anNcc7NvlvHbQWMYwWcgH3XRKA==",
+      "dev": true,
+      "dependencies": {
+        "parse5": "^6.0.1",
+        "parse5-htmlparser2-tree-adapter": "^6.0.1",
+        "requireindex": "^1.2.0"
+      },
+      "engines": {
+        "node": ">= 12"
+      },
+      "peerDependencies": {
+        "eslint": ">= 5"
+      }
+    },
     "node_modules/eslint-plugin-n": {
       "version": "17.10.2",
       "resolved": "https://registry.npmjs.org/eslint-plugin-n/-/eslint-plugin-n-17.10.2.tgz",
@@ -10954,6 +10972,21 @@
         "parse-torrent": "bin/cmd.js"
       }
     },
+    "node_modules/parse5": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/parse5/-/parse5-6.0.1.tgz",
+      "integrity": "sha512-Ofn/CTFzRGTTxwpNEs9PP93gXShHcTq255nzRYSKe8AkVpZY7e1fpmTfOyoIvjP5HG7Z2ZM7VS9PPhQGW2pOpw==",
+      "dev": true
+    },
+    "node_modules/parse5-htmlparser2-tree-adapter": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/parse5-htmlparser2-tree-adapter/-/parse5-htmlparser2-tree-adapter-6.0.1.tgz",
+      "integrity": "sha512-qPuWvbLgvDGilKc5BoicRovlT4MtYT6JfJyBOMDsKoiT+GiuP5qyrPCnR9HcPECIJJmZh5jRndyNThnhhb/vlA==",
+      "dev": true,
+      "dependencies": {
+        "parse5": "^6.0.1"
+      }
+    },
     "node_modules/parseurl": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
@@ -11587,6 +11620,15 @@
       "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
       "dev": true
     },
+    "node_modules/requireindex": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/requireindex/-/requireindex-1.2.0.tgz",
+      "integrity": "sha512-L9jEkOi3ASd9PYit2cwRfyppc9NoABujTP8/5gFcbERmo5jUoAKovIC3fsF17pkTnGsrByysqX+Kxd2OTNI1ww==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.5"
+      }
+    },
     "node_modules/requires-port": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz",
@@ -19606,6 +19648,17 @@
         }
       }
     },
+    "eslint-plugin-lit": {
+      "version": "1.15.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-lit/-/eslint-plugin-lit-1.15.0.tgz",
+      "integrity": "sha512-Yhr2MYNz6Ln8megKcX503aVZQln8wsywCG49g0heiJ/Qr5UjkE4pGr4Usez2anNcc7NvlvHbQWMYwWcgH3XRKA==",
+      "dev": true,
+      "requires": {
+        "parse5": "^6.0.1",
+        "parse5-htmlparser2-tree-adapter": "^6.0.1",
+        "requireindex": "^1.2.0"
+      }
+    },
     "eslint-plugin-n": {
       "version": "17.10.2",
       "resolved": "https://registry.npmjs.org/eslint-plugin-n/-/eslint-plugin-n-17.10.2.tgz",
@@ -22304,6 +22357,21 @@
         "simple-sha1": "^3.1.0"
       }
     },
+    "parse5": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/parse5/-/parse5-6.0.1.tgz",
+      "integrity": "sha512-Ofn/CTFzRGTTxwpNEs9PP93gXShHcTq255nzRYSKe8AkVpZY7e1fpmTfOyoIvjP5HG7Z2ZM7VS9PPhQGW2pOpw==",
+      "dev": true
+    },
+    "parse5-htmlparser2-tree-adapter": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/parse5-htmlparser2-tree-adapter/-/parse5-htmlparser2-tree-adapter-6.0.1.tgz",
+      "integrity": "sha512-qPuWvbLgvDGilKc5BoicRovlT4MtYT6JfJyBOMDsKoiT+GiuP5qyrPCnR9HcPECIJJmZh5jRndyNThnhhb/vlA==",
+      "dev": true,
+      "requires": {
+        "parse5": "^6.0.1"
+      }
+    },
     "parseurl": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/parseurl/-/parseurl-1.3.3.tgz",
@@ -22753,6 +22821,12 @@
       "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
       "dev": true
     },
+    "requireindex": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/requireindex/-/requireindex-1.2.0.tgz",
+      "integrity": "sha512-L9jEkOi3ASd9PYit2cwRfyppc9NoABujTP8/5gFcbERmo5jUoAKovIC3fsF17pkTnGsrByysqX+Kxd2OTNI1ww==",
+      "dev": true
+    },
     "requires-port": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz",
diff --git a/package.json b/package.json
index 368b7e2b..9b178d60 100644
--- a/package.json
+++ b/package.json
@@ -60,6 +60,7 @@
     "esbuild": "^0.16.1",
     "eslint": "^8.57.0",
     "eslint-config-love": "^64.0.0",
+    "eslint-plugin-lit": "^1.15.0",
     "globals": "^15.9.0",
     "lit": "^2.4.0",
     "lit-analyzer": "^1.2.1",
@@ -106,8 +107,8 @@
     "build": "npm-run-all -s clean:light build:languages check:client:tsc -s build:client build:server build:images build:styles build:avatars build:serverconverse build:prosodymodules build:converse build:prosody",
     "lint": "npm-run-all -s lint:script lint:lit lint:styles lint:reuse",
     "lint:fix": "npm-run-all -s lint:script:fix lint:styles:fix",
-    "lint:script": "npx eslint --ext .js --ext .ts .",
-    "lint:script:fix": "npx eslint --ext .js --ext .ts . --fix",
+    "lint:script": "npx eslint .",
+    "lint:script:fix": "npx eslint . --fix",
     "lint:lit": "npx lit-analyzer client/ conversejs/",
     "lint:styles": "stylelint 'conversejs/**/*.scss' 'assets/styles/**/*.scss'",
     "lint:styles:fix": "stylelint 'conversejs/**/*.scss' 'assets/styles/**/*.scss' --fix",
diff --git a/server/lib/configuration/bot.ts b/server/lib/configuration/bot.ts
index c55e88e7..08c574c0 100644
--- a/server/lib/configuration/bot.ts
+++ b/server/lib/configuration/bot.ts
@@ -13,7 +13,7 @@ let singleton: BotConfiguration | undefined
 
 type RoomConfCache =
   null // already loaded, but file does not exist
-  | RoomConf // loaded, and contains the room conf
+    | RoomConf // loaded, and contains the room conf
 
 type ChannelCommonRoomConf = Omit<RoomConf, 'local' | 'domain'>
 
diff --git a/server/lib/configuration/channel/storage.ts b/server/lib/configuration/channel/storage.ts
index 2be1f254..096700d0 100644
--- a/server/lib/configuration/channel/storage.ts
+++ b/server/lib/configuration/channel/storage.ts
@@ -187,8 +187,8 @@ function _getForbiddenWordsHandler (
   } else {
     // Here we must add word-breaks and escape entries.
     // We join all entries in one Regexp (for the same reason as above).
-    rule.regexp = '(?:' +
-      forbiddenWords.entries.map(s => {
+    rule.regexp = '(?:' + forbiddenWords.entries.map(
+      s => {
         s = _stringToWordRegexp(s)
         // Must add the \b...
         // ... but... won't work if the first (or last) char is an emoji.
@@ -201,7 +201,8 @@ function _getForbiddenWordsHandler (
         }
         // FIXME: this solution wont work for non-latin charsets.
         return s
-      }).join(')|(?:') + ')'
+      }
+    ).join(')|(?:') + ')'
   }
 
   if (forbiddenWords.reason) {
diff --git a/server/lib/conversejs/params.ts b/server/lib/conversejs/params.ts
index fee81e86..e2b3641f 100644
--- a/server/lib/conversejs/params.ts
+++ b/server/lib/conversejs/params.ts
@@ -234,14 +234,14 @@ async function _connectionInfos (
   params: GetConverseJSParamsParams,
   roomInfos: RoomInfos
 ): Promise<{
-    prosodyDomain: string
-    localAnonymousJID: string
-    localBoshUri: string
-    localWsUri: string | null
-    remoteConnectionInfos: WCRemoteConnectionInfos | undefined
-    roomJID: string
-    customEmojisUrl?: string
-  } | InitConverseJSParamsError> {
+  prosodyDomain: string
+  localAnonymousJID: string
+  localBoshUri: string
+  localWsUri: string | null
+  remoteConnectionInfos: WCRemoteConnectionInfos | undefined
+  roomJID: string
+  customEmojisUrl?: string
+} | InitConverseJSParamsError> {
   const { video, remoteChatInfos, channelId, roomKey } = roomInfos
 
   const prosodyDomain = await getProsodyDomain(options)
diff --git a/server/lib/debug.ts b/server/lib/debug.ts
index 0ba918f5..9fd39490 100644
--- a/server/lib/debug.ts
+++ b/server/lib/debug.ts
@@ -27,11 +27,11 @@ interface DebugContent {
 }
 
 type DebugNumericValue = 'renewCertCheckInterval'
-| 'renewSelfSignedCertInterval'
-| 'logRotateEvery'
-| 'logRotateCheckInterval'
-| 'remoteServerInfosMaxAge'
-| 'externalAccountPruneInterval'
+  | 'renewSelfSignedCertInterval'
+  | 'logRotateEvery'
+  | 'logRotateCheckInterval'
+  | 'remoteServerInfosMaxAge'
+  | 'externalAccountPruneInterval'
 
 type DebugBooleanValue = 'alwaysPublishXMPPRoom' | 'enablePodcastChatTagForNonLive' | 'useOpenSSL'
 
diff --git a/server/lib/diagnostic/prosody.ts b/server/lib/diagnostic/prosody.ts
index a6c32b3a..9bf87646 100644
--- a/server/lib/diagnostic/prosody.ts
+++ b/server/lib/diagnostic/prosody.ts
@@ -48,7 +48,8 @@ export async function diagProsody (test: string, options: RegisterServerOptions)
       if (process.arch !== 'x64' && process.arch !== 'x86_64' && process.arch !== 'arm64') {
         result.messages.push({
           level: 'error',
-          message: 'Error: your CPU is a ' +
+          message:
+            'Error: your CPU is a ' +
             process.arch + ', ' +
             'which is not compatible with the plugin. ' +
             'Please read the plugin installation documentation for a workaround.'
diff --git a/server/lib/diagnostic/utils.ts b/server/lib/diagnostic/utils.ts
index a8d48a80..d4cec2f8 100644
--- a/server/lib/diagnostic/utils.ts
+++ b/server/lib/diagnostic/utils.ts
@@ -3,8 +3,8 @@
 // SPDX-License-Identifier: AGPL-3.0-only
 
 type NextValue = 'backend' | 'debug' | 'webchat-video' | 'prosody'
-| 'external-auth-custom-oidc' | 'external-auth-google-oidc' | 'external-auth-facebook-oidc'
-| 'everything-ok'
+  | 'external-auth-custom-oidc' | 'external-auth-google-oidc' | 'external-auth-facebook-oidc'
+  | 'everything-ok'
 
 interface MessageWithLevel {
   level: 'info' | 'warning' | 'error'
diff --git a/server/lib/emojis/emojis.ts b/server/lib/emojis/emojis.ts
index e8092043..359edd20 100644
--- a/server/lib/emojis/emojis.ts
+++ b/server/lib/emojis/emojis.ts
@@ -78,12 +78,13 @@ export class Emojis {
     if (!await this.channelHasCustomEmojis(channelId)) {
       return undefined
     }
+    const route = getBaseRouterRoute(this.options) +
+      'emojis/channel/' +
+      encodeURIComponent(channelId) +
+      '/definition'
     return canonicalizePluginUri(
       this.options,
-      getBaseRouterRoute(this.options) +
-        'emojis/channel/' +
-        encodeURIComponent(channelId) +
-        '/definition',
+      route,
       {
         removePluginVersion: true
       }
diff --git a/server/lib/federation/sanitize.ts b/server/lib/federation/sanitize.ts
index 45c4bb10..35275e2a 100644
--- a/server/lib/federation/sanitize.ts
+++ b/server/lib/federation/sanitize.ts
@@ -289,7 +289,7 @@ function _sanitizePeertubeLiveChatInfosV0 (
   logger.debug('We are have to migrate data from the old JSONLD format')
 
   if (chatInfos === false) { return false }
-  if (!_assertObjectType(chatInfos)) { return false}
+  if (!_assertObjectType(chatInfos)) { return false }
 
   if (chatInfos.type !== 'xmpp') { return false }
   if (typeof chatInfos.jid !== 'string') { return false }
diff --git a/server/lib/settings.ts b/server/lib/settings.ts
index 03805924..1e463809 100644
--- a/server/lib/settings.ts
+++ b/server/lib/settings.ts
@@ -529,7 +529,7 @@ function initThemingSettings ({ registerSetting }: RegisterServerOptions): void
       { value: 'peertube', label: loc('converse_theme_option_peertube') },
       { value: 'default', label: loc('converse_theme_option_default') },
       { value: 'cyberpunk', label: loc('converse_theme_option_cyberpunk') }
-    ] as Array<{value: ConverseJSTheme, label: string}>,
+    ] as Array<{ value: ConverseJSTheme, label: string }>,
     descriptionHTML: loc('converse_theme_description')
   })