如何使用打字稿获取输入值（输入请求）

Question

我想获取输入值并将它们放入json 但我不知道在这种情况下如何获取输入值

如果我尝试 document.querySelector("todo-text").value 结果出错了。

const NewTodo: React.FC<NewTodoProps> = (props) => {
  /*   const textInputRef = useRef<HTMLInputElement>(null); */
  const formData = new FormData();
  const photos = document.querySelector('input[type="text"][multiple]');

  const data = {
    word: document.querySelector<HTMLInputElement>("todo-text").value,
    meaning: document.getElementById("todo-meaning"),
  };

  const handleSubmit = async () => {
    const body = JSON.stringify(data);
    debugger;
    const response = await fetch("https://localhost:5001/api/vocas", {
      method: "POST", // *GET, POST, PUT, DELETE, etc.
      //mode: "cors", // no-cors, *cors, same-origin
      //cache: "no-cache", // *default, no-cache, reload, force-cache, only-if-cached
      //credentials: "same-origin", // include, *same-origin, omit
      headers: {
        "Content-Type": "application/json",
        Accept: "*/*",
      },
      //redirect: "follow", // manual, *follow, error
      //referrerPolicy: "no-referrer", // no-referrer, *no-referrer-when-downgrade, origin, origin-when-cross-origin, same-origin, strict-origin, strict-origin-when-cross-origin, unsafe-url
      body: body, // 本文のデータ型は "Content-Type" ヘッダーと一致する必要があります
    });
    debugger;
    const result = await response.json();
    console.log(result);
    return;
  };

  return (
    <form onSubmit={handleSubmit}>
      <div className="form-control">
        <label htmlFor="todo-text">単語:</label>
        <input type="text" id="todo-text" />
        <br />
        <label htmlFor="todo-meaning">意味:</label>
        <input type="text" id="todo-meaning" />
      </div>
      <button type="submit">追加</button>
    </form>
  );
};

在这种情况下，如何获取输入值？？

Answer 1

我们需要使用 useState 来捕获用户输入

import {useState} from 'react';

const[toDoText,setToDoText] = useState("");

在输入字段中添加一个 onChange 事件

    const handleInput = (event : React.ChangeEvent<HTMLInputElement>) => {
            let target = event.target;
            setToDoText((currentState) => {
                return target.value;
            })
        }
      <input type="text" id="todo-text" onChange={handleInput} />

如何使用打字稿获取输入值（输入请求）

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