Question

GatsbyJS初学者，尝试获取布尔玛响应式菜单切换，以将“ is-active”类应用于菜单（带有gatsby入门级netlify cms的Gatsby v2）。这里的所有代码：https://github.com/pddew/gatsby-starter-netlify-cms

当前显示切换按钮和脚本标签，但按钮无响应。

gatsby starter business中有一个此版本的工作版本，当我检查并与之比较时，我无法发现错误，只是似乎切换按钮上没有事件监听器应该有。当我检查站点时，将调用toggle.js脚本，并将其放在结束body标签之前，然后进行查看。

我尝试过运气不佳的构建和部署，清除缓存并将脚本替换为bulma的建议代码。

这是相关的代码。任何帮助，我们将不胜感激；我有点卡住了！

在Layout.js中：

    import React from 'react' import Helmet from 'react-helmet'

import Navbar from '../components/Navbar' import Footer from '../components/Footer' import './all.sass'

const TemplateWrapper = ({ children }) => (   <div>
    <Helmet title="Immediate Start Jobs" />
    <Navbar />
    <div>{children}</div>
    <Footer />   </div> )

export default TemplateWrapper

在导航栏中：

<button className="button navbar-burger" data-target="navMenu">
      <span />
      <span />
      <span />
    </button>
  </div>
  <div className="navbar-menu" id="navMenu">
    <div className="navbar-start">
      <Link className="navbar-item" to="/about">
        About
      </Link>
      <Link className="navbar-item" to="/products">
        Products
      </Link>
      <Link className="navbar-item" to="/blog">
      Blog
    </Link>
    </div>

在html.js中

    import React from "react"
import PropTypes from "prop-types"

export default class HTML extends React.Component {
  render() {
    return (
      <html {...this.props.htmlAttributes}>
        <head>
          <meta charSet="utf-8" />
          <meta httpEquiv="x-ua-compatible" content="ie=edge" />
          <meta
            name="viewport"
            content="width=device-width, initial-scale=1, shrink-to-fit=no"
          />
          {this.props.headComponents}
        </head>
        <body {...this.props.bodyAttributes}>
          {this.props.preBodyComponents}
          <div
            key={`body`}
            id="___gatsby"
            dangerouslySetInnerHTML={{ __html: this.props.body }}
          />
          {this.props.postBodyComponents}
          <script src={__PATH_PREFIX__ + '/js/toggle.js'} />

        </body>
      </html>
    )
  }
}

HTML.propTypes = {
  htmlAttributes: PropTypes.object,
  headComponents: PropTypes.array,
  bodyAttributes: PropTypes.object,
  preBodyComponents: PropTypes.array,
  body: PropTypes.string,
  postBodyComponents: PropTypes.array,
}

还有我的toggle.js，存储在static / js /

中

    document.addEventListener('DOMContentLoaded', function () {
  // Get all "navbar-burger" elements
  var $navbarBurgers = Array.prototype.slice.call(document.querySelectorAll('.navbar-burger'), 0)
  // Check if there are any navbar burgers
  if ($navbarBurgers.length > 0) {
    // Add a click event on each of them
    $navbarBurgers.forEach(function ($el) {
      $el.addEventListener('click', function () {
        // Get the target from the "data-target" attribute
        var target = $el.dataset.target
        var $target = document.getElementById(target)
        // Toggle the className on both the "navbar-burger" and the "navbar-menu"
        $el.classList.toggle('is-active')
        $target.classList.toggle('is-active')
      })
    })
  }
})

Answer 1

我本人是Gatsby的新手，但我必须找到一种使导航栏正常工作的方法。我的解决方案既快捷又肮脏，但是可以。如果您使用许多会改变状态的组件来构建网站，则建议您使用redux和中央商店。我的解决方案是让导航栏处理自己的状态。

import React, { Component } from 'react'
import Link from 'gatsby-link'

class Navbar extends Component {

    state = {
        //This sets the state of Bulma elements
        navbarIsActive: "navbar-item has-dropdown"
      }

      //This opens the navbar dropdown
      navbarOpenDropdown = () => {
        this.setState({
          navbarIsActive: "navbar-item has-dropdown is-active"
        })
      }

      //This closes the navbar dropdown
      navbarCloseDropdown = () => {
        this.setState({
          navbarIsActive: "navbar-item has-dropdown"
        })
      }

    render() {
        return(
            <div>
                <nav class="navbar is-transparent" role="navigation" aria-label="dropdown navigation">
                    <a class="navbar-item">
                        <h1>Title!</h1>
                    </a>

                    <div 
                        class={this.state.navbarIsActive}
                        onMouseEnter={this.navbarOpenDropdown}
                        onMouseLeave={this.navbarCloseDropdown}
                        >
                        <a class="navbar-link">
                            Docs
                        </a>

                        <div class="navbar-dropdown is-boxed">
                            <Link to="/">Home</Link>
                            <Link to="/about">About Us</Link>
                            <Link to="/blog">Blog</Link>
                            <hr class="navbar-divider"/>
                            <div class="navbar-item">
                                Version 0.7.2
                            </div>
                        </div>
                    </div>
                </nav>

                <section class="hero">
                    <div class="hero-body">
                        <p class="title">
                            Documentation
                        </p>
                        <p class="subtitle">
                            Everything you need to <strong>create a website</strong> with Bulma
                        </p>
                    </div>
                </section>
            </div>
        )
    }
}

export default Navbar;

Answer 2

那只是我两个便士的价值：https://nhpcr.codesandbox.io/

src / Navbar.js


import React from 'react';
import PropTypes from 'prop-types';

const NavbarItem = props => (
  <a className="navbar-item is-capitalized" href={`#${props.page}`}>
    {props.page}
  </a>
);
const NavbarBurger = props => (
  <button
    onClick={props.toggleMenu}
    className={`button navbar-burger ${props.active ? 'is-active' : ''}`}
  >
    <span />
    <span />
    <span />
  </button>
);

export default class Navbar extends React.Component {
  state = {
    activeMenu: false,
  };
  toggleMenu = () => {
    this.setState({
      activeMenu: !this.state.activeMenu,
    });
  };
  render() {
    let { pages = [], color } = this.props;
    let navbarItems = pages.map(page => <NavbarItem page={page} key={page} />);
    return (
      <nav className={`navbar is-fixed-top is-${color}`}>
        <div className="navbar-brand">
          <NavbarItem page="logo" />
          <NavbarBurger
            active={this.state.activeMenu}
            toggleMenu={this.toggleMenu}
          />
        </div>
        <div
          className={`navbar-menu ${this.state.activeMenu ? 'is-active' : ''}`}
        >
          <div className="navbar-start">{navbarItems}</div>
        </div>
      </nav>
    );
  }
}

Navbar.propTypes = {
  pages: PropTypes.array.isRequired,
  color: PropTypes.string,
};

src / index.js

import React from 'react';
import { render } from 'react-dom';

import Navbar from './Navbar';

import 'bulma/css/bulma.css';

const styles = {
  fontFamily: 'sans-serif',
  textAlign: 'center',
};

const pages = ['about', 'contact', 'sitemap'];
const App = () => (
  <div style={styles}>
    <Navbar pages={pages} />
  </div>
);

render(<App />, document.getElementById('root'));

gatsbyjs中的bulma菜单切换不起作用

2 个答案: