如何使用 javascript 在小屏幕上默认隐藏导航栏中的导航链接？

Question

我使用 tailwind css 设置了我的 navber，并且能够使其响应。当在较小的屏幕上查看时，导航链接以弹性块的方式显示在彼此下方。但是，当在移动视口中查看时，默认情况下会显示导航链接。实现了一个可以单击以显示和隐藏它的按钮，但我如何使用 javascript 实际编写代码使其工作？这是我的代码片段：

<script src="https://cdn.tailwindcss.com"></script>
<!--Navbar-->
    <nav id="navbar" class="fixed inset-x-0 flex flex-center justify-between flex-wrap p-5 lg:mx-10 lg:mt-5 shadow-xl rounded-lg">
      <div class="flex items-center flex-shrink-0 text-green-600 mr-6">
        <img class="fill-current h-8 w-8 mr-2" src="images/Logo.svg" alt="Logo" width="20">
        <span class="font-bold text-2xl tracking-tight">First Last</span>
      </div>
      <div class="block md:hidden">
        <button class="flex items-center px-3 py-2 border rounded hover:text-green-300 hover:border-green-300">
          <svg class="fill-current h-3 w-3" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><title>Menu</title><path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z"/></svg>
        </button>
      </div>
      <div class="w-full block md:flex md:items-center md:w-auto">
        <div class="text-sm md:flex-grow">
          <a href="#school" class="block mt-4 md:inline-block md:mt-0 hover:text-green-300 mr-4">About</a>
          <a href="#skills" class="block mt-4 md:inline-block md:mt-0 hover:text-green-300 mr-4">Skills</a>
          <a href="#projects" class="block mt-4 md:inline-block md:mt-0 hover:text-green-300 mr-4">Projects</a>
          <a href="#experience" class="block mt-4 md:inline-block md:mt-0 hover:text-green-300 mr-4">Experience</a>
        </div>
      </div>
    </nav>

Image of Navbar seen from the mobile view

Answer 1

将 block md:flex 更改为 hidden md:flex，这将隐藏移动屏幕上的菜单。
然后您可以使用 Element.classList.toggle 在移动屏幕上单击按钮时切换 hidden class。

试试这个

document.addEventListener('DOMContentLoaded', function(){
    let menu = document.getElementById('navbar-menu');

    document.getElementById('navbar-toggler').addEventListener('click', event => {
        menu.classList.toggle('hidden')
    })
})

<script src="https://cdn.tailwindcss.com"></script>
<!--Navbar-->
<nav id="navbar" class="fixed inset-x-0 flex flex-center justify-between flex-wrap p-5 lg:mx-10 lg:mt-5 shadow-xl rounded-lg">
    <div class="flex items-center flex-shrink-0 text-green-600 mr-6">
        <img class="fill-current h-8 w-8 mr-2" src="images/Logo.svg" alt="Logo" width="20">
        <span class="font-bold text-2xl tracking-tight">First Last</span>
    </div>
    <div class="block md:hidden">
        <button class="flex items-center px-3 py-2 border rounded hover:text-green-300 hover:border-green-300" id="navbar-toggler">
            <svg class="fill-current h-3 w-3" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><title>Menu</title><path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z"/></svg>
        </button>
    </div>
    <div class="w-full hidden md:flex md:items-center md:w-auto" id="navbar-menu">
        <div class="text-sm md:flex-grow">
            <a href="#school" class="block mt-4 md:inline-block md:mt-0 hover:text-green-300 mr-4">About</a>
            <a href="#skills" class="block mt-4 md:inline-block md:mt-0 hover:text-green-300 mr-4">Skills</a>
            <a href="#projects" class="block mt-4 md:inline-block md:mt-0 hover:text-green-300 mr-4">Projects</a>
            <a href="#experience" class="block mt-4 md:inline-block md:mt-0 hover:text-green-300 mr-4">Experience</a>
        </div>
    </div>
</nav>

Answer 2

您可以使用 Javascript 通过其 id select 元素并添加或删除 classes/styles 以实现切换效果。

例如：

const navbar = document.querySelector("#navbar");
if (navbar.classList.contains("something"){
   someelement.style.display = "none";
   anotherElement.style.display = "block";
   navbar.classList.add("someClass");
}

这是一个相同的代码笔示例。 https://codepen.io/ljc-dev/pen/MWoRayy

如何使用 javascript 在小屏幕上默认隐藏导航栏中的导航链接？

How can I use javascript to hide by default the navigation links in my navbar on small screens?

javascript

html

css

tailwind-css