我正在使用:Tailwindcss、React 和 Next.js 进行业余项目。
我正在尝试创建一个响应式导航栏,当屏幕尺寸达到顺风定义的“sm”尺寸时,它会显示一个汉堡菜单。
当我单击汉堡包图标时,我希望菜单从高度 0 过渡到 max-h-40。
我觉得我在下面的代码中遗漏了一些微不足道的东西,希望其他人看到这个可以看到我遗漏了什么?
navbar.tsx
"use client";
import Image from "next/image";
import Link from "next/link";
import {
  useState
} from "react";
import logo from "../public/finallang_favicon.ico";
export default function Navbar() {
  const [showMenu, setShowMenu] = useState(false);
  const toggleMenu = () => {
    setShowMenu(!showMenu);
  };
  return ( <
    div >
    <
    nav className = "flex items-center justify-between flex-grow w-auto py-3 text-center border-b px-9 sm:w-auto" >
    <
    div className = "flex items-center justify-center flex-shrink-0 sm:mr-6" >
    <
    Link href = "/" >
    <
    Image src = {
      logo
    }
    alt = "Logo"
    width = {
      48
    }
    height = {
      48
    }
    /> <
    /Link> <
    /div> <
    div className = "hidden text-sm sm:block" >
    <
    Link href = "#"
    className = "block mt-4 sm:mr-4 text-slate-900 hover:text-slate-700 sm:mt-0 sm:inline-block" >
    About <
    /Link> <
    Link href = "#"
    className = "block mt-4 sm:mr-4 text-slate-900 hover:text-slate-700 sm:mt-0 sm:inline-block" >
    Blog <
    /Link> <
    Link href = "#"
    className = "block mt-4 text-slate-900 hover:text-slate-700 sm:mt-0 sm:inline-block" >
    Contact Me <
    /Link> <
    /div> <
    div >
    <
    button className = "hidden px-4 py-2 text-sm leading-none rounded text-slate-100 hover:text-white sm:inline-block bg-brand" >
    Download <
    /button> <
    button onClick = {
      toggleMenu
    }
    aria - label = "Toggle navigation menu"
    className = "text-gray-400 align-middle sm:hidden hover:text-gray-900 focus:ring-2 rounded-md" >
    <
    svg xmlns = "http://www.w3.org/2000/svg"
    fill = "none"
    viewBox = "0 0 24 24"
    strokeWidth = {
      2
    }
    stroke = "currentColor"
    className = "w-6 h-6" >
    <
    path strokeLinecap = "round"
    strokeLinejoin = "round"
    d = "M3.75 6.75h16.5M3.75 12h16.5m-16.5 5.25h16.5" / >
    <
    /svg> <
    /button> <
    /div> <
    /nav> {
      showMenu &&
        <
        div className = {
          `${showMenu ? "max-h-40" : "h-0"} text-sm text-center sm:hidden transition-all duration-500 ease-in-out overflow-hidden`
        } >
        <
        Link href = "/about"
      className = "block mt-4 text-slate-900 hover:text-slate-700" >
        About <
        /Link> <
        Link href = "/blog"
      className = "block mt-4 text-slate-900 hover:text-slate-700" >
        Blog <
        /Link> <
        Link href = "/contact"
      className = "block mt-4 text-slate-900 hover:text-slate-700" >
        Contact Me <
        /Link> <
        /div>
    } <
    /div>
  );
}
我尝试过的事情:
height: "height" 作为 transitionProperty 添加到我的 tailwind.config.jsoverflow-hidden 类名添加到我的菜单类中transition-all 和 transition-[height] 之间切换当前行为: 当前行为的动图
我期望发生什么:
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问题解释
DOM挂载
通过代码片段进行条件渲染:
{showMenu &&
 
 
 
 
 
 
 
 
 
 
 
 
 
 表示元素被挂载到 DOM 中或挂载到 DOM 之外。过渡不会在元素安装/卸载的同一帧上播放。
CSS 属性转换
此外,您还可以使用菜单容器的条件类更改不同的 CSS 属性:
${showMenu ? "max-h-40" : "h-0"}max-h-40对应max-height: 10rem而h-0对应height: 0。这意味着我们要更改两个值的初始值:max-height和height。根据 MDN,max-height的初始值为none和height的初始值为auto.这些值相对于showMenu的变化如下:showMenutruefalsemax-height10remnoneheightauto0