使用Bulma的汉堡菜单不起作用

Question

我是新手。我试图在我的标题中进行导航。我使用Bulma CSS：

"bulma": "^0.7.4",

，我像这样导入Bulma文件：

import 'bulma/css/bulma.css';

它适用于大多数CSS，但在汉堡菜单中不适用于菜单当我单击汉堡按钮

时，不会倒塌

这是我的标题代码：

import React,{Component} from 'react'
import {NavLink} from 'react-router-dom';
import style from './style.css';
class Header extends Component{
    render(){
        return (
            <React.Fragment>
                <nav className="navbar is-fixed-top" role="navigation" aria-label="main navigation">
                    <div className="navbar-brand">
                        <a href="/" className="navbar-item" to="/">
                        <img src="" alt="" width={112} height={28}/>
                        </a>
                        <a role="button" className="navbar-burger burger " aria-label="menu" aria-expanded="false" data-target="mainNavbar">
                        <span aria-hidden="true"></span>
                        <span aria-hidden="true"></span>
                        <span aria-hidden="true"></span>
                        </a>
                    </div>
                    <div  id="mainNavbar" className="navbar-menu">
                        <div className="navbar-start">
                            <NavLink exact activeClassName={style.active} to="/"  className="navbar-item">
                                Home
                            </NavLink>
                            <NavLink activeClassName={style.active} to="/films"  className="navbar-item">
                                Films
                            </NavLink>
                        </div>
                    </div>
                    </nav>  
            </React.Fragment>
        );
    }
}

export default Header;

数据目标

汉堡按钮上的属性没有触发菜单。请让我知道我在做什么错。谢谢

Answer 1

bulma没有内置的切换事件，您必须通过在" navbar-burger"one_answers" navbar-menu"中手动创建它来创建它，我在这里用React Hooks

实现了

 const [isActive, setisActive] = React.useState(false);

 <nav className="navbar" role="navigation" aria-label="main navigation">
        <div className="navbar-brand">
          <a
            onClick={() => {
              setisActive(!isActive);
            }}
            role="button"
            className={`navbar-burger burger ${isActive ? "is-active" : ""}`}
            aria-label="menu"
            aria-expanded="false"
            data-target="navbarBasicExample"
          >
            <span aria-hidden="true"></span>
            <span aria-hidden="true"></span>
            <span aria-hidden="true"></span>
          </a>
        </div>
        <div
          id="navbarBasicExample"
          className={`navbar-menu ${isActive ? "is-active" : ""}`}
        >
          <div className="navbar-start">
            <a className="navbar-item">Home</a>
            <a className="navbar-item">Documentation</a>
          </div>
        </div>
   </nav>

Answer 2

正如另一个答案中所述，要使布尔玛的汉堡菜单起作用。以下是我的做法。toggleBurgerMenu中的密钥。另外，需要在每个navbar-item的onClick事件中指定toggleBurgerMenu，以便单击菜单项后关闭汉堡菜单。

import React from 'react';
import { Link } from 'react-router-dom';
const Navigation = (props) => {
  function toggleBurgerMenu() {
    document.querySelector('.navbar-menu').classList.toggle('is-active');
  }
  return (
    <nav className="navbar" role="navigation" aria-label="main navigation">
      <div className="navbar-brand">
        <Link to="/" className="navbar-item">React App</Link>
        <a role="button" className="navbar-burger burger" aria-label="menu" aria-expanded="false" data-target="navbarBasic"
          onClick={toggleBurgerMenu}>
          <span aria-hidden="true"></span>
          <span aria-hidden="true"></span>
          <span aria-hidden="true"></span>
        </a>
      </div>
      <div id="navbarBasic" className="navbar-menu">
        <div className="navbar-start">
          <Link to="/about" className="navbar-item" onClick={toggleBurgerMenu}>About</Link>
          <Link to="/contact" className="navbar-item" onClick={toggleBurgerMenu}>Contact</Link>
          <Link to="/notes" className="navbar-item" onClick={toggleBurgerMenu}>Notes</Link>
        </div>
      </div>
    </nav>
  );
}
export default Navigation;

Answer 3

当您单击汉堡时，'navbar-menu'应该是'navbar-menu is-Active'。在相反的情况下，您还应删除" IS-Active"。