--- a/libervia/web/pages/chat/_browser/__init__.py	Wed Jun 28 10:05:16 2023 +0200
+++ b/libervia/web/pages/chat/_browser/__init__.py	Wed Jun 28 10:06:54 2023 +0200
@@ -19,7 +19,6 @@
 
 
 class LiberviaWebChat:
-
     def __init__(self):
         self.message_tpl = Template("chat/message.html")
         self.messages_elt = document["messages"]
@@ -48,7 +47,6 @@
             <= SCROLL_SENSITIVITY
         )
 
-
     def send_message(self):
         """Send message currently in input area
 
@@ -219,13 +217,13 @@
     def on_attachment_delete(self, evt):
         evt.stopPropagation()
         target = evt.currentTarget
-        item_elt = DOMNode(target.closest('.attachment-preview'))
+        item_elt = DOMNode(target.closest(".attachment-preview"))
         item_elt.remove()
 
     def on_attach_button_click(self, evt):
         document["file_input"].click()
 
-    @bind(document["attachments"], 'wheel')
+    @bind(document["attachments"], "wheel")
     def wheel_event(evt):
         """Make the mouse wheel to act on horizontal scrolling for attachments
 
@@ -233,43 +231,43 @@
         for horizontal scrolling
         """
         if evt.deltaY != 0:
-            document['attachments'].scrollLeft += evt.deltaY * 0.8
+            document["attachments"].scrollLeft += evt.deltaY * 0.8
             evt.preventDefault()
 
-    def make_attachments_dynamic(self, parent_elt = None):
+    def make_attachments_dynamic(self, parent_elt=None):
         """Make attachments dynamically clickable"""
         # FIXME: only handle images for now, and display them in a modal
         if parent_elt is None:
             parent_elt = document
-        img_elts = parent_elt.select('.message-attachment img')
+        img_elts = parent_elt.select(".message-attachment img")
         for img_elt in img_elts:
-            img_elt.bind('click', self.open_modal)
-            img_elt.style.cursor = 'pointer'
+            img_elt.bind("click", self.open_modal)
+            img_elt.style.cursor = "pointer"
 
-        close_button = document.select_one('.modal-close')
-        close_button.bind('click', self.close_modal)
+        close_button = document.select_one(".modal-close")
+        close_button.bind("click", self.close_modal)
 
     def open_modal(self, evt):
-        modal_image = document.select_one('#modal-image')
+        modal_image = document.select_one("#modal-image")
         modal_image.src = evt.target.src
         modal_image.alt = evt.target.alt
-        modal = document.select_one('#modal')
-        modal.classList.add('is-active')
+        modal = document.select_one("#modal")
+        modal.classList.add("is-active")
 
     def close_modal(self, evt):
-        modal = document.select_one('#modal')
-        modal.classList.remove('is-active')
+        modal = document.select_one("#modal")
+        modal.classList.remove("is-active")
 
 
 libervia_web_chat = LiberviaWebChat()
+
 document["message_input"].bind(
     "input", lambda __: libervia_web_chat.auto_resize_message_input()
 )
 document["message_input"].bind("keydown", libervia_web_chat.on_message_keydown)
 document["send_button"].bind("click", lambda __: libervia_web_chat.send_message())
-document["attach_button"].bind(
-    "click", libervia_web_chat.on_attach_button_click
-)
+document["attach_button"].bind("click", libervia_web_chat.on_attach_button_click)
 document["file_input"].bind("change", libervia_web_chat.on_file_selected)
 bridge.register_signal("message_new", libervia_web_chat._on_message_new)
+
 libervia_web_chat.make_attachments_dynamic()