Running in native mode results in a blank window.

[alimate2023]

Running in native mode results in a blank window.
The console displays a warning message as follows
I don't know if elements are not displayed in the native window.

from nicegui import native, ui
from nicegui.elements import markdown

ui.icon('thumb_up')
ui.markdown('This is **Markdown**.')
ui.html('This is <strong>HTML</strong>.')
with ui.row():
    ui.label('CSS').style('color: #888; font-weight: bold')
    ui.label('Tailwind').classes('font-serif')
    ui.label('Quasar').classes('q-ml-xl')
ui.link('NiceGUI on GitHub', 'https://github.com/zauberzeug/nicegui')

# ui.run()

ui.label('Hello from PyInstaller')

# ui.run(reload=False, port=native.find_open_port())
ui.run(reload=False,native=True, window_size=(400, 300), fullscreen=False)

console error

NiceGUI ready to go on http://localhost:8000
[pywebview] MSHTML is deprecated. See https://pywebview.flowrl.com/guide/renderer.html#web-engine on details how to
use Edge Chromium

[falkoschindler]

Hi @alimate2023,

Have you installed the newest versions of NiceGUI and pywebview?
And can you, please, show the full console log after starting the app? There's a KeyboardInterrupt in your screenshot - where is this coming from?
Thanks!

[alimate2023]

PS C:\Data\Project\alimate2_nicegui> pip freeze
aiofiles==23.2.1
aiohttp==3.9.3
aiosignal==1.3.1
annotated-types==0.6.0
anyio==4.3.0
attrs==23.2.0
beautifulsoup4==4.12.3
bidict==0.23.1
bottle==0.12.25
bs4==0.0.2
CacheControl==0.14.0
cachetools==5.3.3
certifi==2024.2.2
cffi==1.16.0
charset-normalizer==3.3.2
click==8.1.7
clr-loader==0.2.6
colorama==0.4.6
cryptography==42.0.5
docutils==0.19
fastapi==0.109.2
firebase-admin==6.5.0
frozenlist==1.4.1
google-api-core==2.17.1
google-api-python-client==2.122.0
google-auth==2.29.0
google-auth-httplib2==0.2.0
google-cloud-core==2.4.1
google-cloud-firestore==2.15.0
google-cloud-storage==2.16.0
google-crc32c==1.5.0
google-resumable-media==2.7.0
googleapis-common-protos==1.63.0
grpcio==1.62.1
grpcio-status==1.62.1
h11==0.14.0
httpcore==1.0.4
httplib2==0.22.0
httptools==0.6.1
httpx==0.27.0
idna==3.6
ifaddr==0.2.0
itsdangerous==2.1.2
Jinja2==3.1.3
loguru==0.7.2
markdown2==2.4.13
MarkupSafe==2.1.5
msgpack==1.0.8
multidict==6.0.5
nicegui==1.4.18
numpy==1.26.4
orjson==3.9.15
outcome==1.3.0.post0
pandas==2.2.1
proto-plus==1.23.0
protobuf==4.25.3
proxy_tools==0.1.0
pscript==0.7.7
pyasn1==0.5.1
pyasn1-modules==0.3.0
pycparser==2.21
pydantic==2.6.4
pydantic_core==2.16.3
Pygments==2.17.2
PyJWT==2.8.0
pyparsing==3.1.2
PySocks==1.7.1
python-dateutil==2.9.0.post0
python-dotenv==1.0.1
python-engineio==4.9.0
python-multipart==0.0.9
python-socketio==5.11.1
pythonnet==3.0.3
pytz==2024.1
pywebview==5.0.5
PyYAML==6.0.1
requests==2.31.0
rsa==4.9
selenium==4.18.1
simple-websocket==1.0.0
six==1.16.0
sniffio==1.3.1
sortedcontainers==2.4.0
soupsieve==2.5
starlette==0.36.3
trio==0.25.0
trio-websocket==0.11.1
typing_extensions==4.10.0
tzdata==2024.1
uritemplate==4.1.1
urllib3==2.2.1
uvicorn==0.29.0
vbuild==0.8.2
watchfiles==0.21.0
websockets==12.0
win32-setctime==1.1.0
wsproto==1.2.0
yarl==1.9.4

[alimate2023]

[alimate2023]

Only a blank screen appears as if you can see it.

[alimate2023]

somebody help me! plz ..

[rodja]

@alimate2023 thanks for providing more details. Instead of screenshots, text would have been much better because it would allow us to copy paste code or the url. Have you read the link behind the url in the pywebview warning?

[alimate2023]

If you simply run pywebview, the screen will display normally.
However, it is not visible in nicegui.

[alimate2023]

@rodja @falkoschindler
Please test it on the Windows 11 OS.

[falkoschindler]

Sorry, @alimate2023, we don't have access to Windows machines at the moment. I just created issue #2751 from this discussion. Maybe someone from the community can help.

[gsal]

I just run into this same issue.

Linux Rocky 9
Python 3.9
Brand new python virtual environment,
pip installed nicegui, qt, pywebview[qt]
Nicegui window is blank
BUT, not just nicegui
if I run the (non-nicegui) 3-line test3.py webview program above, I also just get blank screen and no error messages at all.
what gives?

[gsal]

Ok, started over; this time with a conda envionment. The test3.py above works.

[Muyv]

check your system proxy

[python-and-fiction]

Have you seen the init problem?

[Muyv]

try to use pywebview create window with http://localhost:8000 (nicegui app), start with arg debug=True, it will shows developer's tool, then you will see the errors.

[python-and-fiction]

the problem is MSHTML , not system proxy,don't mistake it.

[Muyv]

not the same problem I had, thank you for providing more useful reference

[python-and-fiction]

@alimate2023
Plz try to set gui mode to ‘edgechromium’ (need to install webview2 on windows) or 'qt''pyside2''pyside6' (need to install dependencies , check it in pywebview's doc).
default ‘mshtml’ is IE, that is not compatible with nicegui.
see it in https://pywebview.flowrl.com/guide/web_engine.html#web-engine

from nicegui import  ui,app

app.native.start_args['gui'] = 'edgechromium' 
ui.icon('thumb_up')
ui.markdown('This is **Markdown**.')
ui.html('This is <strong>HTML</strong>.')
with ui.row():
    ui.label('CSS').style('color: #888; font-weight: bold')
    ui.label('Tailwind').classes('font-serif')
    ui.label('Quasar').classes('q-ml-xl')
ui.link('NiceGUI on GitHub', 'https://github.com/zauberzeug/nicegui')

ui.label('Hello from PyInstaller')

ui.run(reload=False,native=True, window_size=(400, 300), fullscreen=False)