Question

React拒绝在键入时继续关注输入字段。

我已尝试修复它，但未成功。我不了解这种行为。

这是组件：

import React, { useState } from 'react'
import styled from 'styled-components'

const Auth = () => {
    const Form = styled.form``
    const InputGroup = styled.div``
    const Input = styled.input``
    const Button = styled.button``

    const [email, setEmail] = useState('')
    const [password, setPassword] = useState('')

    return (
        <Form>
            <InputGroup>
                <Input
                    value={email}
                    onChange={event => {
                        setEmail(event.target.value)
                    }}
                    type="email"
                />
            </InputGroup>
            <InputGroup>
                <Input
                    value={password}
                    onChange={event => {
                        setPassword(event.target.value)
                    }}
                    type="password"
                />
            </InputGroup>
            <Button />
        </Form>
    )
}

export default Auth

codesandbox working example of the problem

Answer 1

问题在于您正在函数内部定义Input组件，每次都会创建一个新元素，因此新输入失去了焦点。要解决问题，请在功能之外定义组件。

import React, { useState } from "react";
import ReactDOM from "react-dom";

import "./styles.css";

import styled from "styled-components";

const Form = styled.form``;
const InputGroup = styled.div``;
const Input = styled.input``;
const Button = styled.button``;

const Auth = () => {

  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");

  return (
    <Form>
      <InputGroup>
        <Input
          value={email}
          onChange={event => {
            setEmail(event.target.value);
          }}
          type="email"
        />
      </InputGroup>
      <InputGroup>
        <Input
          value={password}
          onChange={event => {
            setPassword(event.target.value);
          }}
          type="password"
        />
      </InputGroup>
      <Button>press me</Button>
    </Form>
  );
};

function App() {
  return (
    <div className="App">
      <Auth />
    </div>
  );
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

键入时反应未聚焦输入字段

1 个答案: