如何将原始HTML/JavaScript添加到Dash应用程序？

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

app = dash.Dash(__name__)

app.layout = html.Div(
    children=[
        html.H1("My Dash App"),
        dcc.Input(id="input", type="text", placeholder="Enter text"),
        html.Div(id="output")
    ]
)

@app.callback(
    Output("output", "children"),
    [Input("input", "value")]
)
def update_output(value):
    # 在这里添加原始的HTML/JavaScript代码
    return html.Div([
        html.H3("Output:"),
        html.P(value)
    ])

if __name__ == "__main__":
    app.run_server(debug=True)