javascript - 關於react 定義函數的使用箭頭函數寫法

Question

直接上程式碼
以下是login.jsx的程式碼

import React from 'react';
import ReactDOM from 'react-dom';
import {
    render
} from 'react-dom';
import {
    Form,
    Icon,
    Input,
    Button,
    Checkbox
} from 'antd';

const FormItem = Form.Item;

class LoginForm extends React.Component {
    // constructor(props) {
    //     super(props);
    //     this.loginSubmit = this.loginSubmit.bind(this);
    // };
    loginSubmit = (e) => {
        e.preventDefault();
        this.props.form.validateFields((err, values) => {
            if (!err) {
                console.log('Received values of form: ', values);
            }else{

            }
        });
    }
    render() {
        const {
            getFieldDecorator
        } = this.props.form;
        return (
            <Form className="login-form" onSubmit={this.loginSubmit}>
                <FormItem>
                    {
                        getFieldDecorator('sss', {
                                rules: [{ required: true, message: 'Please input your username!' }],
                            }
                        )
                        (
                            <Input prefix={<Icon type="user" style={{ fontSize: 13 }} />} placeholder="Username" />
                        )
                    }
                </FormItem>
                <FormItem>
                    {getFieldDecorator('password', {
                        rules: [{ required: true, message: 'Please input your Password!' }],
                    })(
                        <Input prefix={<Icon type="lock" style={{ fontSize: 13 }} />} type="password" placeholder="Password" />
                    )}
                </FormItem>
                <FormItem>
                    {getFieldDecorator('remember', {
                        valuePropName: 'checked',
                        initialValue: true,
                    })(
                        <Checkbox>Remember me</Checkbox>
                    )}
                    <a className="login-form-forgot" href="">Forgot password</a>
                    <p>
                        <Button type="primary" htmlType="submit" className="login-form-button">
                            Log in
                        </Button>
                        Or <a href="">register now!</a>
                    </p>
                    
                </FormItem>
            </Form>
        );
    }
}
const Login = Form.create()(LoginForm);
export default Login;

儲存後瀏覽器開啟直接報錯，我查了下react和antd 都是這麼寫的，具體報錯如下：

#求大神指教

Answer 1

你是少了這個babel-preset-stage