bug: filepicker in 0.28.3 ok but in ^0.80.1 show unKnown control: FilePicker

[kza483-hub]

Duplicate Check

• I have searched the opened issues and there are no duplicates

Describe the bug

run simple code as follow, report unknown control filepicker, in flet ^0.80.1 . but in 0.23 is ok

import flet as ft
import mimetypes, hashlib, json, os, socket, webbrowser, traceback, sys, datetime

修正 Windows MIME 類型

mimetypes.add_type("application/javascript", ".js")
mimetypes.add_type("application/javascript", ".mjs")

def main(page: ft.Page):
# Minimal reproduction
page.title = "FilePicker Test"

fp = ft.FilePicker()
fp.on_result = lambda e: print(f"Selected: {e.files}")
page.overlay.append(fp)

def on_click(_):
    fp.pick_files()

page.add(
    ft.Text("Testing FilePicker on Port 8551"),
    ft.ElevatedButton("Open File Picker", on_click=on_click)
)
page.update()

Run on new port to avoid cache

ft.app(target=main, view=ft.AppView.WEB_BROWSER, upload_dir= "uploads", port=8555)

Code sample

Code

import flet as ft
import mimetypes, hashlib, json, os, socket, webbrowser, traceback, sys, datetime

修正 Windows MIME 類型

mimetypes.add_type("application/javascript", ".js")
mimetypes.add_type("application/javascript", ".mjs")

def main(page: ft.Page):
# Minimal reproduction
page.title = "FilePicker Test"

fp = ft.FilePicker()
fp.on_result = lambda e: print(f"Selected: {e.files}")
page.overlay.append(fp)

def on_click(_):
    fp.pick_files()

page.add(
    ft.Text("Testing FilePicker on Port 8551"),
    ft.ElevatedButton("Open File Picker", on_click=on_click)
)
page.update()

Run on new port to avoid cache

ft.app(target=main, view=ft.AppView.WEB_BROWSER, upload_dir= "uploads", port=8555)

To reproduce

import flet as ft
import mimetypes, hashlib, json, os, socket, webbrowser, traceback, sys, datetime

修正 Windows MIME 類型

mimetypes.add_type("application/javascript", ".js")
mimetypes.add_type("application/javascript", ".mjs")

def main(page: ft.Page):
# Minimal reproduction
page.title = "FilePicker Test"

fp = ft.FilePicker()
fp.on_result = lambda e: print(f"Selected: {e.files}")
page.overlay.append(fp)

def on_click(_):
    fp.pick_files()

page.add(
    ft.Text("Testing FilePicker on Port 8551"),
    ft.ElevatedButton("Open File Picker", on_click=on_click)
)
page.update()

Run on new port to avoid cache

ft.app(target=main, view=ft.AppView.WEB_BROWSER, upload_dir= "uploads", port=8555)

Expected behavior

no show error!

Screenshots / Videos

Captures

[Upload media here]

Operating System

Windows

Operating system details

win 11

Flet version

^0.80.1

Regression

Yes, it used to work in a previous Flet version (please specify the version in additional details)

Suggestions

No response

Logs

Logs

[Paste your logs here]

Additional details

No response

[ndonkoHenri]

See examples here for >=v0.80.0: https://docs.flet.dev/services/filepicker/#examples

We made breaking api changes, reason why your code doesnt work anymore in this new version.