diff --git a/umap/static/umap/js/modules/data/layer.js b/umap/static/umap/js/modules/data/layer.js
index 11cf3f40..f0b80a20 100644
--- a/umap/static/umap/js/modules/data/layer.js
+++ b/umap/static/umap/js/modules/data/layer.js
@@ -1,4 +1,4 @@
-// Uses U.DataLayerPermissions, U.Marker, U.Polygon, U.Polyline, U.TableEditor not yet ES modules
+// Uses U.Marker, U.Polygon, U.Polyline, U.TableEditor not yet ES modules
 // Uses U.FormBuilder not available as ESM
 
 // FIXME: this module should not depend on Leaflet
@@ -18,6 +18,7 @@ import {
   uMapAlertConflict as AlertConflict,
 } from '../../components/alerts/alert.js'
 import { translate } from '../i18n.js'
+import { DataLayerPermissions } from '../permissions.js'
 
 export const LAYER_TYPES = [DefaultLayer, Cluster, Heat, Choropleth, Categorized]
 
@@ -67,7 +68,7 @@ export class DataLayer {
     }
     this.backupOptions()
     this.connectToMap()
-    this.permissions = new U.DataLayerPermissions(this)
+    this.permissions = new DataLayerPermissions(this)
     if (!this.umap_id) {
       if (this.showAtLoad()) this.show()
       this.isDirty = true
diff --git a/umap/static/umap/js/modules/global.js b/umap/static/umap/js/modules/global.js
index d96e3ff1..f9950548 100644
--- a/umap/static/umap/js/modules/global.js
+++ b/umap/static/umap/js/modules/global.js
@@ -27,6 +27,7 @@ import Tooltip from './ui/tooltip.js'
 import URLs from './urls.js'
 import * as Utils from './utils.js'
 import { DataLayer, LAYER_TYPES } from './data/layer.js'
+import { DataLayerPermissions, MapPermissions } from './permissions.js'
 
 // Import modules and export them to the global scope.
 // For the not yet module-compatible JS out there.
@@ -41,6 +42,7 @@ window.U = {
   Browser,
   Caption,
   DataLayer,
+  DataLayerPermissions,
   Dialog,
   EditPanel,
   Facets,
@@ -50,6 +52,7 @@ window.U = {
   HTTPError,
   Importer,
   LAYER_TYPES,
+  MapPermissions,
   NOKError,
   Orderable,
   Panel,
diff --git a/umap/static/umap/js/modules/permissions.js b/umap/static/umap/js/modules/permissions.js
new file mode 100644
index 00000000..a3bcec6d
--- /dev/null
+++ b/umap/static/umap/js/modules/permissions.js
@@ -0,0 +1,285 @@
+import { DomUtil } from '../../vendors/leaflet/leaflet-src.esm.js'
+import { translate } from './i18n.js'
+import { uMapAlert as Alert } from '../components/alerts/alert.js'
+import * as Utils from './utils.js'
+
+// Dedicated object so we can deal with a separate dirty status, and thus
+// call the endpoint only when needed, saving one call at each save.
+export class MapPermissions {
+  constructor(map) {
+    this.setOptions(map.options.permissions)
+    this.map = map
+    this._isDirty = false
+  }
+
+  set isDirty(status) {
+    this._isDirty = status
+    if (status) this.map.isDirty = status
+  }
+
+  get isDirty() {
+    return this._isDirty
+  }
+
+  setOptions(options) {
+    this.options = Object.assign(
+      {
+        owner: null,
+        editors: [],
+        share_status: null,
+        edit_status: null,
+      },
+      options
+    )
+  }
+
+  isOwner() {
+    return this.map.options.user?.id === this.map.options.permissions.owner?.id
+  }
+
+  isAnonymousMap() {
+    return !this.map.options.permissions.owner
+  }
+
+  getMap() {
+    return this.map
+  }
+
+  edit() {
+    if (this.map.options.editMode !== 'advanced') return
+    if (!this.map.options.umap_id) {
+      return Alert.info(translate('Please save the map first'))
+    }
+    const container = DomUtil.create('div', 'permissions-panel')
+    const fields = []
+    DomUtil.createTitle(container, translate('Update permissions'), 'icon-key')
+    if (this.isAnonymousMap()) {
+      if (this.options.anonymous_edit_url) {
+        const helpText = `${translate('Secret edit link:')}<br>${
+          this.options.anonymous_edit_url
+        }`
+        DomUtil.element({
+          tagName: 'p',
+          className: 'help-text',
+          innerHTML: helpText,
+          parent: container,
+        })
+        fields.push([
+          'options.edit_status',
+          {
+            handler: 'IntSelect',
+            label: translate('Who can edit'),
+            selectOptions: this.map.options.edit_statuses,
+            helpText: helpText,
+          },
+        ])
+      }
+    } else {
+      if (this.isOwner()) {
+        fields.push([
+          'options.edit_status',
+          {
+            handler: 'IntSelect',
+            label: translate('Who can edit'),
+            selectOptions: this.map.options.edit_statuses,
+          },
+        ])
+        fields.push([
+          'options.share_status',
+          {
+            handler: 'IntSelect',
+            label: translate('Who can view'),
+            selectOptions: this.map.options.share_statuses,
+          },
+        ])
+        fields.push([
+          'options.owner',
+          { handler: 'ManageOwner', label: translate("Map's owner") },
+        ])
+      }
+      fields.push([
+        'options.editors',
+        { handler: 'ManageEditors', label: translate("Map's editors") },
+      ])
+    }
+
+    const builder = new U.FormBuilder(this, fields)
+    const form = builder.build()
+    container.appendChild(form)
+    if (this.isAnonymousMap() && this.map.options.user) {
+      // We have a user, and this user has come through here, so they can edit the map, so let's allow to own the map.
+      // Note: real check is made on the back office anyway.
+      const advancedActions = DomUtil.createFieldset(
+        container,
+        translate('Advanced actions')
+      )
+      const advancedButtons = DomUtil.create('div', 'button-bar', advancedActions)
+      DomUtil.createButton(
+        'button',
+        advancedButtons,
+        translate('Attach the map to my account'),
+        this.attach,
+        this
+      )
+    }
+    DomUtil.add('h4', '', container, translate('Datalayers'))
+    this.map.eachDataLayer((datalayer) => {
+      datalayer.permissions.edit(container)
+    })
+    this.map.editPanel.open({ content: container, className: 'dark' })
+  }
+
+  async attach() {
+    const [data, response, error] = await this.map.server.post(this.getAttachUrl())
+    if (!error) {
+      this.options.owner = this.map.options.user
+      Alert.success(translate('Map has been attached to your account'))
+      this.map.editPanel.close()
+    }
+  }
+
+  async save() {
+    if (!this.isDirty) return this.map.continueSaving()
+    const formData = new FormData()
+    if (!this.isAnonymousMap() && this.options.editors) {
+      const editors = this.options.editors.map((u) => u.id)
+      for (let i = 0; i < this.options.editors.length; i++)
+        formData.append('editors', this.options.editors[i].id)
+    }
+    if (this.isOwner() || this.isAnonymousMap())
+      formData.append('edit_status', this.options.edit_status)
+    if (this.isOwner()) {
+      formData.append('owner', this.options.owner?.id)
+      formData.append('share_status', this.options.share_status)
+    }
+    const [data, response, error] = await this.map.server.post(
+      this.getUrl(),
+      {},
+      formData
+    )
+    if (!error) {
+      this.commit()
+      this.isDirty = false
+      this.map.continueSaving()
+      this.map.fire('postsync')
+    }
+  }
+
+  getUrl() {
+    return Utils.template(this.map.options.urls.map_update_permissions, {
+      map_id: this.map.options.umap_id,
+    })
+  }
+
+  getAttachUrl() {
+    return Utils.template(this.map.options.urls.map_attach_owner, {
+      map_id: this.map.options.umap_id,
+    })
+  }
+
+  addOwnerLink(element, container) {
+    if (this.options.owner?.name && this.options.owner.url) {
+      const ownerContainer = DomUtil.add(
+        element,
+        'umap-map-owner',
+        container,
+        ` ${translate('by')} `
+      )
+      DomUtil.createLink(
+        '',
+        ownerContainer,
+        this.options.owner.name,
+        this.options.owner.url
+      )
+    }
+  }
+
+  commit() {
+    this.map.options.permissions = Object.assign(
+      this.map.options.permissions,
+      this.options
+    )
+  }
+
+  getShareStatusDisplay() {
+    return Object.fromEntries(this.map.options.share_statuses)[
+      this.options.share_status
+    ]
+  }
+}
+
+export class DataLayerPermissions {
+  constructor(datalayer) {
+    this.options = Object.assign(
+      {
+        edit_status: null,
+      },
+      datalayer.options.permissions
+    )
+
+    this.datalayer = datalayer
+    this._isDirty = false
+  }
+
+  set isDirty(status) {
+    this._isDirty = status
+    if (status) this.datalayer.isDirty = status
+  }
+
+  get isDirty() {
+    return this._isDirty
+  }
+
+  getMap() {
+    return this.datalayer.map
+  }
+
+  edit(container) {
+    const fields = [
+      [
+        'options.edit_status',
+        {
+          handler: 'IntSelect',
+          label: translate('Who can edit "{layer}"', {
+            layer: this.datalayer.getName(),
+          }),
+          selectOptions: this.datalayer.map.options.datalayer_edit_statuses,
+        },
+      ],
+    ]
+    const builder = new U.FormBuilder(this, fields, {
+      className: 'umap-form datalayer-permissions',
+    })
+    const form = builder.build()
+    container.appendChild(form)
+  }
+
+  getUrl() {
+    return Utils.template(this.datalayer.map.options.urls.datalayer_permissions, {
+      map_id: this.datalayer.map.options.umap_id,
+      pk: this.datalayer.umap_id,
+    })
+  }
+  async save() {
+    if (!this.isDirty) return this.datalayer.map.continueSaving()
+    const formData = new FormData()
+    formData.append('edit_status', this.options.edit_status)
+    const [data, response, error] = await this.datalayer.map.server.post(
+      this.getUrl(),
+      {},
+      formData
+    )
+    if (!error) {
+      this.commit()
+      this.isDirty = false
+      this.datalayer.map.continueSaving()
+    }
+  }
+
+  commit() {
+    this.datalayer.options.permissions = Object.assign(
+      this.datalayer.options.permissions,
+      this.options
+    )
+  }
+}
diff --git a/umap/static/umap/js/umap.datalayer.permissions.js b/umap/static/umap/js/umap.datalayer.permissions.js
deleted file mode 100644
index d5a6a288..00000000
--- a/umap/static/umap/js/umap.datalayer.permissions.js
+++ /dev/null
@@ -1,70 +0,0 @@
-U.DataLayerPermissions = L.Class.extend({
-  options: {
-    edit_status: null,
-  },
-
-  initialize: function (datalayer) {
-    this.options = L.Util.setOptions(this, datalayer.options.permissions)
-    this.datalayer = datalayer
-    let isDirty = false
-    try {
-      Object.defineProperty(this, 'isDirty', {
-        get: () => isDirty,
-        set: (status) => {
-          isDirty = status
-          if (status) this.datalayer.isDirty = status
-        },
-      })
-    } catch (e) {
-      // Certainly IE8, which has a limited version of defineProperty
-    }
-  },
-
-  getMap: function () {
-    return this.datalayer.map
-  },
-
-  edit: function (container) {
-    const fields = [
-      [
-        'options.edit_status',
-        {
-          handler: 'IntSelect',
-          label: L._('Who can edit "{layer}"', { layer: this.datalayer.getName() }),
-          selectOptions: this.datalayer.map.options.datalayer_edit_statuses,
-        },
-      ],
-    ]
-    const builder = new U.FormBuilder(this, fields, {
-      className: 'umap-form datalayer-permissions',
-    })
-    const form = builder.build()
-    container.appendChild(form)
-  },
-
-  getUrl: function () {
-    return U.Utils.template(this.datalayer.map.options.urls.datalayer_permissions, {
-      map_id: this.datalayer.map.options.umap_id,
-      pk: this.datalayer.umap_id,
-    })
-  },
-  save: async function () {
-    if (!this.isDirty) return this.datalayer.map.continueSaving()
-    const formData = new FormData()
-    formData.append('edit_status', this.options.edit_status)
-    const [data, response, error] = await this.datalayer.map.server.post(
-      this.getUrl(),
-      {},
-      formData
-    )
-    if (!error) {
-      this.commit()
-      this.isDirty = false
-      this.datalayer.map.continueSaving()
-    }
-  },
-
-  commit: function () {
-    L.Util.extend(this.datalayer.options.permissions, this.options)
-  },
-})
diff --git a/umap/static/umap/js/umap.permissions.js b/umap/static/umap/js/umap.permissions.js
deleted file mode 100644
index 58cdd2e5..00000000
--- a/umap/static/umap/js/umap.permissions.js
+++ /dev/null
@@ -1,208 +0,0 @@
-// Dedicated object so we can deal with a separate dirty status, and thus
-// call the endpoint only when needed, saving one call at each save.
-U.MapPermissions = L.Class.extend({
-  options: {
-    owner: null,
-    editors: [],
-    share_status: null,
-    edit_status: null,
-  },
-
-  initialize: function (map) {
-    this.setOptions(map.options.permissions)
-    this.map = map
-    let isDirty = false
-    try {
-      Object.defineProperty(this, 'isDirty', {
-        get: () => isDirty,
-        set: (status) => {
-          isDirty = status
-          if (status) {
-            this.map.isDirty = status
-          }
-        },
-      })
-    } catch (e) {
-      // Certainly IE8, which has a limited version of defineProperty
-    }
-  },
-
-  setOptions: function (options) {
-    this.options = L.Util.setOptions(this, options)
-  },
-
-  isOwner: function () {
-    return (
-      this.map.options.user &&
-      this.map.options.permissions.owner &&
-      this.map.options.user.id === this.map.options.permissions.owner.id
-    )
-  },
-
-  isAnonymousMap: function () {
-    return !this.map.options.permissions.owner
-  },
-
-  getMap: function () {
-    return this.map
-  },
-
-  edit: function () {
-    if (this.map.options.editMode !== 'advanced') return
-    if (!this.map.options.umap_id) {
-      return U.Alert.info(L._('Please save the map first'))
-    }
-    const container = L.DomUtil.create('div', 'permissions-panel')
-    const fields = []
-    L.DomUtil.createTitle(container, L._('Update permissions'), 'icon-key')
-    if (this.isAnonymousMap()) {
-      if (this.options.anonymous_edit_url) {
-        const helpText = `${L._('Secret edit link:')}<br>${
-          this.options.anonymous_edit_url
-        }`
-        L.DomUtil.element({
-          tagName: 'p',
-          className: 'help-text',
-          innerHTML: helpText,
-          parent: container,
-        })
-        fields.push([
-          'options.edit_status',
-          {
-            handler: 'IntSelect',
-            label: L._('Who can edit'),
-            selectOptions: this.map.options.edit_statuses,
-            helpText: helpText,
-          },
-        ])
-      }
-    } else {
-      if (this.isOwner()) {
-        fields.push([
-          'options.edit_status',
-          {
-            handler: 'IntSelect',
-            label: L._('Who can edit'),
-            selectOptions: this.map.options.edit_statuses,
-          },
-        ])
-        fields.push([
-          'options.share_status',
-          {
-            handler: 'IntSelect',
-            label: L._('Who can view'),
-            selectOptions: this.map.options.share_statuses,
-          },
-        ])
-        fields.push([
-          'options.owner',
-          { handler: 'ManageOwner', label: L._("Map's owner") },
-        ])
-      }
-      fields.push([
-        'options.editors',
-        { handler: 'ManageEditors', label: L._("Map's editors") },
-      ])
-    }
-
-    const builder = new U.FormBuilder(this, fields)
-    const form = builder.build()
-    container.appendChild(form)
-    if (this.isAnonymousMap() && this.map.options.user) {
-      // We have a user, and this user has come through here, so they can edit the map, so let's allow to own the map.
-      // Note: real check is made on the back office anyway.
-      const advancedActions = L.DomUtil.createFieldset(
-        container,
-        L._('Advanced actions')
-      )
-      const advancedButtons = L.DomUtil.create('div', 'button-bar', advancedActions)
-      L.DomUtil.createButton(
-        'button',
-        advancedButtons,
-        L._('Attach the map to my account'),
-        this.attach,
-        this
-      )
-    }
-    L.DomUtil.add('h4', '', container, L._('Datalayers'))
-    this.map.eachDataLayer((datalayer) => {
-      datalayer.permissions.edit(container)
-    })
-    this.map.editPanel.open({ content: container, className: 'dark' })
-  },
-
-  attach: async function () {
-    const [data, response, error] = await this.map.server.post(this.getAttachUrl())
-    if (!error) {
-      this.options.owner = this.map.options.user
-      U.Alert.success(L._('Map has been attached to your account'))
-      this.map.editPanel.close()
-    }
-  },
-
-  save: async function () {
-    if (!this.isDirty) return this.map.continueSaving()
-    const formData = new FormData()
-    if (!this.isAnonymousMap() && this.options.editors) {
-      const editors = this.options.editors.map((u) => u.id)
-      for (let i = 0; i < this.options.editors.length; i++)
-        formData.append('editors', this.options.editors[i].id)
-    }
-    if (this.isOwner() || this.isAnonymousMap())
-      formData.append('edit_status', this.options.edit_status)
-    if (this.isOwner()) {
-      formData.append('owner', this.options.owner?.id)
-      formData.append('share_status', this.options.share_status)
-    }
-    const [data, response, error] = await this.map.server.post(
-      this.getUrl(),
-      {},
-      formData
-    )
-    if (!error) {
-      this.commit()
-      this.isDirty = false
-      this.map.continueSaving()
-      this.map.fire('postsync')
-    }
-  },
-
-  getUrl: function () {
-    return U.Utils.template(this.map.options.urls.map_update_permissions, {
-      map_id: this.map.options.umap_id,
-    })
-  },
-
-  getAttachUrl: function () {
-    return U.Utils.template(this.map.options.urls.map_attach_owner, {
-      map_id: this.map.options.umap_id,
-    })
-  },
-
-  addOwnerLink: function (element, container) {
-    if (this.options.owner?.name && this.options.owner.url) {
-      const ownerContainer = L.DomUtil.add(
-        element,
-        'umap-map-owner',
-        container,
-        ` ${L._('by')} `
-      )
-      L.DomUtil.createLink(
-        '',
-        ownerContainer,
-        this.options.owner.name,
-        this.options.owner.url
-      )
-    }
-  },
-
-  commit: function () {
-    L.Util.extend(this.map.options.permissions, this.options)
-  },
-
-  getShareStatusDisplay: function () {
-    return Object.fromEntries(this.map.options.share_statuses)[
-      this.options.share_status
-    ]
-  },
-})
diff --git a/umap/templates/umap/js.html b/umap/templates/umap/js.html
index a997056d..187d3314 100644
--- a/umap/templates/umap/js.html
+++ b/umap/templates/umap/js.html
@@ -47,8 +47,6 @@
 <script src="{% static 'umap/js/umap.forms.js' %}" defer></script>
 <script src="{% static 'umap/js/umap.icon.js' %}" defer></script>
 <script src="{% static 'umap/js/umap.features.js' %}" defer></script>
-<script src="{% static 'umap/js/umap.permissions.js' %}" defer></script>
-<script src="{% static 'umap/js/umap.datalayer.permissions.js' %}" defer></script>
 <script src="{% static 'umap/js/umap.controls.js' %}" defer></script>
 <script src="{% static 'umap/js/umap.js' %}" defer></script>
 <script src="{% static 'umap/js/components/fragment.js' %}" defer></script>