reactjs 尝试在Typescript React中获取表单值,但返回HTML标记

44u64gxh  于 2023-02-08  发布在  React
关注(0)|答案(1)|浏览(161)

我尝试将表单值传递给useRef钩子,但返回的是表单HTML tag
我尝试推断chevrons中的HTMLFormElement类型,并将null作为useRef钩子的当前值。
下面是该文件的其余部分:NameTodo.tsx

import React, { FC, ChangeEvent, FormEvent, useState, useRef } from 'react'
import { useDispatch, useSelector } from 'react-redux'
import { addTodoName, toggleNaming } from '../todoReducer';
import { RootState } from '../todoStore';

const NameTodo: FC = () => {

    const dispatch = useDispatch();
    const selector = useSelector((state: RootState) => { return state.todo })

    const [input, setInput] = useState<any>('');
    // Current value returns the HTML form tag itself instead of its value
    const ref = useRef<HTMLFormElement>(null);

    const exitNamingMenu = (): void => {
        dispatch(toggleNaming(false));
    }

    const handleInput = (event: ChangeEvent<HTMLInputElement>): void => {
        event.preventDefault();
        setInput(event.target.value);
    }

    const submitTodoName = (event: FormEvent<HTMLFormElement>): void => {
        event.preventDefault();
        //dispatch(addTodoName(input));
        console.log(ref.current);
        dispatch(toggleNaming(false));
    }

    return (
        <div className='position-absolute start-50 mt-4 translate-middle bg-success' style={{ width: '18vw', height: '20vh' }}>
            <span className='position-absolute end-0'>
                <button className='text-white bg-success bg-opacity-10 border border-0' onClick={exitNamingMenu}>x</button>
            </span>
            <form className='d-flex flex-column' ref={ref} onSubmit={submitTodoName}>
                <p className='text-white text-center' style={{ marginTop: '3vh' }}>Enter the name of your todo-list</p>
                <input type='text' name="input" className='p-1 rounded bg-light border-0 ms-4' style={{ width: '15vw' }} onChange={handleInput}></input>
                <button type="submit" className='btn btn-light mt-3' style={{ width: "6vw", marginLeft: '6vw' }}>Enter</button>
            </form>
        </div>
    )
}

export default NameTodo

没有错误显示,所以除了这个,其他一切都很好...
提前感谢您的回复:)

ee7vknir

ee7vknir1#

你可以在input元素上使用ref来获取值,form没有value,对于复杂的表单,你可以使用FormikReact Hook Form这样的库,它们都很棒。
您可以查看下面链接中的示例:
https://codesandbox.io/s/react-template-forked-loq0yn?file=/src/index.js
如果你想和州政府交涉:

function App() {
  const [inputValue, setInputValue] = useState('');

  const handleSubmit = () => {
    console.log('Value ', inputValue);
  };

  return (
    <div className="App">
      <form onSubmit={handleSubmit}>
        <input
          type="text"
          value={inputValue}
          onChange={(e) => setInputValue(e.target.value)}
        />
        <button type="submit">Submit</button>
      </form>
      Value: {inputValue}
    </div>
  );
}

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