output not being updated by callback

[DSAGRO3F]

Thank you so much for helping improve the quality of Dash!

We do our best to catch bugs during the release process, but we rely on your help to find the ones that slip through.

Describe your context Google Colab Pro

• replace the result of pip list | grep dash below

  dash                             2.18.1
  dash-bootstrap-components        1.6.0
  dash-core-components             2.0.0
  dash-html-components             2.0.0
  dash-table                       5.0.0

• if frontend related, tell us your Browser, Version and OS

  • OS: [e.g. iOS]
  • Browser [e.g. chrome, safari]
  • Version [e.g. 22]

Describe the bug

Using app Dash with dcc.Input() callback I noticed output is not updated accordingly. No error message. If I input "hello" in text box, output should be updated to "hello", instead initial value remains.

Expected behavior

If I input "hello" in text box, output should be updated to "hello", instead initial value remains..

Screenshots

app = JupyterDash(__name__)

port = 8053

"""authenticate using token"""
!ngrok config add-authtoken 2S97GELhJsGO---token---koHb24wsr #Configure authtoken

"""Open a ngrok tunnel to the HTTP server"""
public_url = ngrok.connect(port).public_url
print(f'* ngrok tunnel {public_url} -> http://127.0.0.1:{port}')

"""configure app layout"""
app.layout = html.Div(
    children=[
        html.H5('change value in text box'),

        html.Div(["input: ", dcc.Input(id='my-input', value='initial-value', type='text')]),

        html.Div(id='my-output'),
    ])

"""define callback"""
@app.callback(
    Output(component_id='my-output', component_property='children'),
    Input(component_id='my-input', component_property='value')
)
def update_input(text_input):
  return print(f'output: {text_input}')

if __name__ == "__main__":
  app.run_server(debug=False, jupyter_server_url=public_url, port=port, mode='external')

[gvwilson]

@T4rk1n does the example code look good to you?

[T4rk1n]

@DSAGRO3F You are returning print from the callback here:

def update_input(text_input):
  return print(f'output: {text_input}')

print doesn't return anything.

[DSAGRO3F]

Many thanks!