这可能会帮助Meteor (v1.3)的用户:

render: function() {
    return (
        <form onSubmit={this.submitForm.bind(this)}>
            <input type="text" ref="email" placeholder="Email" />
            <input type="password" ref="password" placeholder="Password" />
            <button type="submit">Login</button>
        </form>
    );
},
submitForm: function(e) {
    e.preventDefault();
    console.log( this.refs.email.value );
    console.log( this.refs.password.value );
}

使用输入中的change事件来更新组件的状态，并在handllogin中访问它:

handleEmailChange: function(e) {
   this.setState({email: e.target.value});
},
handlePasswordChange: function(e) {
   this.setState({password: e.target.value});
},
render : function() {
      return (
        <form>
          <input type="text" name="email" placeholder="Email" value={this.state.email} onChange={this.handleEmailChange} />
          <input type="password" name="password" placeholder="Password" value={this.state.password} onChange={this.handlePasswordChange}/>
          <button type="button" onClick={this.handleLogin}>Login</button>
        </form>);
},
handleLogin: function() {
    console.log("EMail: " + this.state.email);
    console.log("Password: " + this.state.password);
}

工作小提琴。

此外，阅读文档，有一个完整的部分专门用于表单处理:表单

以前你也可以使用React的双向数据绑定助手mixin来实现同样的事情，但现在它被弃用了，取而代之的是设置值和更改处理程序(如上所述):

var ExampleForm = React.createClass({
  mixins: [React.addons.LinkedStateMixin],
  getInitialState: function() {
    return {email: '', password: ''};
  },
  handleLogin: function() {
    console.log("EMail: " + this.state.email);
    console.log("Password: " + this.state.password);
  },
  render: function() {
    return (
      <form>
        <input type="text" valueLink={this.linkState('email')} />
        <input type="password" valueLink={this.linkState('password')} />
        <button type="button" onClick={this.handleLogin}>Login</button>
      </form>
    );
  }
});

文档在这里:双向绑定助手。

我认为这也是你需要的答案。此外，我在这里添加了所需的属性。每个输入组件都是函数。你需要在这里加入你自己的逻辑。

handleEmailChange: function(e) {
    this.setState({email: e.target.value});
},
handlePasswordChange: function(e) {
   this.setState({password: e.target.value});
},
formSubmit : async function(e) {
    e.preventDefault();
    // Form submit Logic
  },
render : function() {
      return (
        <form onSubmit={(e) => this.formSubmit(e)}>
          <input type="text" name="email" placeholder="Email" value={this.state.email} onChange={this.handleEmailChange} required />
          <input type="password" name="password" placeholder="Password" value={this.state.password} onChange={this.handlePasswordChange} required />
          <button type="button">Login</button>
        </form>);
},
handleLogin: function() {
    //Login Function
}

<form onSubmit={handleLogin}>
      <input type="text" name="email" placeholder="Email" />
      <input type="text" name="password" placeholder="Password" />
      <button type="submit">Login</button>
</form>

const handleLogin = (event) => {
    event.preventDefault(); 
    console.log(event.target[0].value)
    console.log(event.target[1].value)         
  }

有几种方法可以做到这一点:

1)通过索引从数组的表单元素中获取值

handleSubmit = (event) => {
  event.preventDefault();
  console.log(event.target[0].value)
}

2)在html中使用name属性

handleSubmit = (event) => {
  event.preventDefault();
  console.log(event.target.elements.username.value) // from elements property
  console.log(event.target.username.value)          // or directly
}

<input type="text" name="username"/>

3)使用裁判

handleSubmit = (event) => {
  console.log(this.inputNode.value)
}

<input type="text" name="username" ref={node => (this.inputNode = node)}/>

完整的示例

class NameForm extends React.Component {
  handleSubmit = (event) => {
    event.preventDefault()
    console.log(event.target[0].value)
    console.log(event.target.elements.username.value)
    console.log(event.target.username.value)
    console.log(this.inputNode.value)
  }
  render() {
    return (
      <form onSubmit={this.handleSubmit}>
        <label>
          Name:
          <input
            type="text"
            name="username"
            ref={node => (this.inputNode = node)}
          />
        </label>
        <button type="submit">Submit</button>
      </form>
    )
  }
}

对于那些不想使用ref和OnChange事件重置状态的人，你可以只使用简单的OnSubmit句柄和循环FormData对象。

注意，你不能直接访问formData.entries()，因为它是一个可迭代对象，你必须循环遍历它。

这个例子使用了React Hooks:

const LoginPage = () => {
  const handleSubmit = (event) => {
    const formData = new FormData(event.currentTarget);
    event.preventDefault();
    for (let [key, value] of formData.entries()) {
      console.log(key, value);
    }
  };

  return (
    <div>
      <form onSubmit={handleSubmit}>
        <input type="text" name="username" placeholder="Email" />
        <input type="password" name="password" placeholder="Password" />
        <button type="submit">Login</button>
      </form>
    </div>
  );
};

如果你使用的是TypeScript:

export const LoginPage: React.FC<{}> = () => {
  const handleSubmit: React.FormEventHandler<HTMLFormElement> = (event) => {
    const formData = new FormData(event.currentTarget);
    event.preventDefault();
    for (let [key, value] of formData.entries()) {
      console.log(key, value);
    }
  };

  return (
    <div>
      <form onSubmit={handleSubmit}>
        <input type="text" name="username" placeholder="Email" />
        <input type="password" name="password" placeholder="Password" />
        <button type="submit">Login</button>
      </form>
    </div>
  );
};