Get value of button click in React Flatpickr

Question

I have a component in React and attached react-flatpicker to get the date value. However, after I use useRef, it shows the value as "may be null", and yes, after console.log, the result is the same:

<Flatpickr
    ref={fp}
    name="startTime"
    className="py-2 bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"
    options={{enableTime: true, noCalendar: true, dateFormat: "H:i",}}
/>

This is the function:

const fp = useRef(null);
function handleSubmitAgenda() {
    console.log(fp?.current?.value);
}

Please give me some inspiration.

Answer 1

To get the value from the React Flatpickr component when you click the button, you need to use the onChange property provided by Flatpickr.

Please view the code base below.

import { useState, useRef } from "react";
import Flatpickr from "react-flatpickr";

function YourComponent() {
  const [selectedDateTime, setSelectedDateTime] = useState(null);
  const fp = useRef(null);

  // 处理日期/时间选择变化的函数
  const handleDateTimeChange = (selectedDates) => {
    setSelectedDateTime(selectedDates[0]);
  };

  function handleSubmitAgenda() {
    console.log(selectedDateTime); // 当点击按钮时，这将记录所选的日期/时间
  }

  return (
    <div>
      <Flatpickr
        ref={fp}
        name="startTime"
        className="py-2 bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"
        options={{
          enableTime: true,
          noCalendar: true,
          dateFormat: "H:i",
        }}
        onChange={handleDateTimeChange} // 在日期/时间选择变化时调用handleDateTimeChange
      />

      <button onClick={handleSubmitAgenda}>提交</button>
    </div>
  );
}

Hope it helps you. good luck.