Collapse issue with expansion

Hello All,

Can anyone please help me with this. I have created 4 buttons in the cardheader and there are four CardBody each for a Card.
But when I try to expand the cardbody by pressing cardheader button the data overlaps with another collapse.
In short the CardBody is not expanding according to the data.
Some Bootstrap class is missing or not working.

My set up:

external_stylesheets = [‘https://codepen.io/chriddyp/pen/bWLwgP.css’,

{
    'href': 'https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css',
    'rel': 'stylesheet',
    'integrity': 'sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO',
    'crossorigin': 'anonymous'
}

]
external_scripts = [
https://www.google-analytics.com/analytics.js’,
{‘src’: ‘https://cdn.polyfill.io/v2/polyfill.min.js’},
{
‘src’: ‘https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.core.js’,
‘integrity’: ‘sha256-Qqd/EfdABZUcAxjOkMi8eGEivtdTkh3b65xCZL4qAQA=’,
‘crossorigin’: ‘anonymous’
}
]

meta_tags=[
{“name”: “viewport”, “content”: “width=device-width, initial-scale=1”},

    {'http-equiv': 'X-UA-Compatible', 'content': 'IE=edge'               },
]

app = dash.Dash( name ,external_stylesheets=external_stylesheets,external_scripts=external_scripts,meta_tags=meta_tags)
app.scripts.config.serve_locally=False
server=app.server
app.config[‘suppress_callback_exceptions’] = True

also My code:

df= pd.read_sql(sql,connection)
table = dbc.Table.from_dataframe(df,bordered=True,dark=True)
app.layout =html.Div([
dbc.Card([
dbc.Button(
dbc.CardHeader(‘Testing1’),id=“button-0”,style={‘width’:‘30px’}),
dbc.Collapse(
dbc.CardBody(table),id=“collapse-0”,style={‘marginTop’:‘1%’})

]),

dbc.Card([
dbc.Button(
dbc.CardHeader(‘Testing2’),id=“button-1”,style={‘width’:‘30px’}),
dbc.Collapse(
dbc.CardBody(table,className=“card-body”),id=“collapse-1”,style={‘marginTop’:‘1%’})

]),

dbc.Card([
dbc.Button(
dbc.CardHeader(‘Testing3’),id=“button-2”,style={‘width’:‘30px’}),
dbc.Collapse(
dbc.CardBody(table),id=“collapse-2”,style={‘marginTop’:‘1%’})

])

])

@app.callback([Output(f"collapse-{i}",“is_open”) for i in range(0,3)],
[Input(f’button-{i}’,“n_clicks”) for i in range(0,3)],
[State(f"collapse-{i}",“is_open”) for i in range(0,3)])
def load(*args):
ctx=dash.callback_context
if not ctx.triggered:
return “”
else:
btn_id = ctx.triggered[0][“prop_id”].split(".")[0]
i=int(btn_id.split("-")[1])

    state = args[-3:]
    click =args[0:3]
    if click[i]:
        return [s if j != i else not s for j,s in enumerate(state)]
    else:
        initial_return=[]

        for i in range(0,3):
            initial_return.append(False)

        return initial_return

if ( name ==“ main ”):
app.run_server(debug=True,port=8091)

see the snapshot

how can I make these divs to expand according to the data rows that are going to load from the system

Thanks in advance!!!

This is resolved. I was having the custom CSS class with the name as card which was causing the issue.
Thanks if anyone was trying to answer.