How can I clear the value in the wdatepicker?

To clear the value in Wdatepicker, you simply need to call the corresponding function in its API. Specifically, you can use the `clear` function to empty the date picker value.

Here is an example code demonstrating how to use the method in Wdatepicker to clear a value.

// 获取日期选择器元素
var datepickerInput = document.getElementById('datepicker');
// 创建日期选择器实例
var datePicker = new WdatePicker(datepickerInput);
// 清空日期选择器的值
datePicker.clear();

In the example above, the input field element of the date picker is first obtained using the `document.getElementById` method and passed to the `WdatePicker` constructor function to create a date picker instance. The value of the date picker can then be cleared by calling the `clear` function.

Please note that the above examples are for demonstration purposes only, adjustments may be needed based on your own code structure and requirements when actually used.