我可以在常数内声明一种方法流星

Question

我可以在常数中声明一种方法，我尝试在navbar中实现onLogout方法，但是我通过说'js [;]预期'或需要声明来遇到错误的错误这样的课程：

导出默认类着陆扩展react.component

import React from 'react';
import {Link} from 'react-router'
import { Accounts } from 'meteor/accounts-base';
const NavbarLanding = () => {
  onLogout() {
    Meteor.logout();
  };
  return (
    <div className="navbar-landing">
      <nav>
        <div>
          <ul className="ul-landing">
            <img src="/images/fly_paper.svg"></img>
            <li className="navbar-title"><a>Landing</a></li>
 {/* <img border="0" height="40" hspace="0" src="/images/fly_paper.png" width="80" /> */}
 {/* onClick={this.onLogout.bind(this) */}
 {/* btn-primary */}
            <div className="navbar-menu">
              <li><a>acerca</a></li>
              <li><a>portafolio</a></li>
              <li><a>contacto</a></li>
              <button className="btn"onClick={this.onLogout.bind(this)}>Logout</button>
            </div>
          </ul>
        </div>
      </nav>
    </div>
  );
};
export default NavbarLanding;
NavbarLanding.reactProptype = {
  title: React.PropTypes.string.isRequired
};

Answer 1

您犯了一个错误声明组件的错误，应该这样：

export default class NavbarLanding extends React.Component {
  onLogout() {
    Meteor.logout();
  }
  render() {
    return (
      // your html here
    );
  }
};
NavbarLanding.reactProptype = {
  title: React.PropTypes.string.isRequired
};