如何以编程方式提交react-hook-form？

Question

我正在尝试向我的react.js 项目添加一个react-hook-form。形式定义为：

<form onSubmit={handleSubmit(onSubmit)} ref={submitRef}>
          //some input elements
          <div className='d-flex justify-content-center' >
            <button
              type="submit"
              className=" btn btn-warning" >
              submit            
            </button>
          </div>
</form>

onSubmit方法定义为：

const onSubmit = data => {
    console.log(data)
  };

我正在尝试定义一个计时器（比如10分钟），并且我想在计时器到期后触发表单的onSubmit事件。为此，我使用了react-timer-hook，如下所示：

const time = new Date();
  time.setSeconds(time.getSeconds() + 2);

  let submitRef = useRef()

  const {
    seconds,
    minutes,
    hours,
    days,
    isRunning,
    start,
    pause,
    resume,
    restart,
  } = useTimer({ time, onExpire: () => want to trigger the form submit event });

我应该如何定义 onExpire 属性？

Answer 1

formRef.current.dispatchEvent(new Event('submit', { cancelable: true, bubbles: true }))

Answer 2

您可以手动调用

handleSubmit

来自文档

// It can be invoked remotely as well
handleSubmit(onSubmit)();

// You can pass an async function for asynchronous validation.
handleSubmit(async (data) => await fetchAPI(data))

类似这样的东西（未经测试）

import { useEffect } from 'react';
import { useForm } from "react-hook-form";

export default function App() {
  const { register, handleSubmit, watch, formState: { errors } } = useForm();
  const onSubmit = data => console.log(data);

  useEffect(() => {
    handleSubmit(onSubmit)();
  }, [])

  return (
    /* "handleSubmit" will validate your inputs before invoking "onSubmit" */
    <form onSubmit={handleSubmit(onSubmit)}>
      {/* register your input into the hook by invoking the "register" function */}
      <input defaultValue="test" {...register("example")} />
      
      {/* include validation with required or other standard HTML validation rules */}
      <input {...register("exampleRequired", { required: true })} />
      {/* errors will return when field validation fails  */}
      {errors.exampleRequired && <span>This field is required</span>}
      
      <input type="submit" />
    </form>
  );
}

Answer 3

您必须在提交之前先触发验证。使用从 useForm 挂钩返回的

trigger

函数。然后调用

handleSubmit

函数。

const submitForm = async () => {
  // Trigger validations before submitting
  const isValid = await trigger();
    
  if (isValid) {
    handleSubmit(onSubmit)();
  }
};