app.py

import gradio as gr

def handler(in1):    
    return in1

in1=gr.Textbox(label='請輸入 HTML 碼')
out1=gr.HTML(label="HTML 效果", container=False)
iface=gr.Interface(
    fn=handler,
    inputs=[in1], 
    outputs=[out1],
    title='HTML 元件測試',
    flagging_mode='never',
    )
iface.launch()