在Dash Plotly中不触发页面回调

from dash.dependencies import Input, Output, State
import dash
import dash_html_components as html
import dash_core_components as dcc

app = dash.Dash(__name__)

app.layout = html.Div([
    dcc.Input(id='input', type='text'),
    html.Button('Submit', id='submit-button'),
    html.Div(id='output')
])

@app.callback(
    Output('output', 'children'),
    [Input('submit-button', 'n_clicks')],
    [State('input', 'value')]
)
def update_output(n_clicks, value):
    if dash.callback_context.triggered[0]['prop_id'] == 'submit-button.n_clicks':
        # 在按钮点击触发回调时执行代码
        return f"You clicked the button and entered: {value}"
    else:
        # 在页面加载时不触发回调
        return ""