Bug or feature: no warning about missing id if id is a dict

If input/state referenced by id which is dict, e.g. Input({'type':'whatever', 'index':'foo'}, 'value')
then there is no warning about missing id when it is not in the layout.
Notice, it is concrete id, not pattern-matching like {index: ALL}
So I’d like to treat this as a feature, but I want to make sure it won’t get fixed/changed.

hi @Val
Welcome to the community and thank you for the question. I’m going to copy the example you shared with me that highlights your case:

from dash import Input, Output, Dash, html

app = Dash(__name__)

app.layout = html.Div([
    html.Div('Hi there!', id='out'),

    Output('out', 'children'),

    # input is not in the layout, but there is no warning 
    Input(dict(type='qq', index='1'), 'n_clicks'),
def tst(n_clicks):
    return []

if __name__ == '__main__':

You are right. No error is shown. This is because there is no check on callbacks (with input as dict), as the inputs are dynamic. Therefore, I don’t think this will get “fixed”.