如何使用重置按钮将DateTimePicker设置为默认值？

// 获取DateTimePicker的实例或标识符
var dateTimePicker = $("#myDateTimePicker");

// 设置默认值为null
var defaultValue = null;

// 重置按钮的点击事件处理程序
$("#resetButton").click(function() {
  // 将DateTimePicker设置为默认值
  dateTimePicker.val(defaultValue);
});

from flask import Flask, request, render_template

app = Flask(__name__)

# 默认值为null
default_value = None

@app.route('/', methods=['GET', 'POST'])
def index():
    if request.method == 'POST':
        # 重置按钮的点击事件处理程序
        if 'resetButton' in request.form:
            # 将DateTimePicker设置为默认值
            return render_template('index.html', datetime=default_value)
    # 渲染模板并传递默认值
    return render_template('index.html', datetime=default_value)

if __name__ == '__main__':
    app.run()