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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<meta name="theme-color" content="#222" media="(prefers-color-scheme: light)">
<meta name="theme-color" content="#222" media="(prefers-color-scheme: dark)"><meta name="generator" content="Hexo 7.1.1">
<link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png">
<link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png">
<link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png">
<link rel="mask-icon" href="/images/logo.svg" color="#222">
<link rel="stylesheet" href="/css/main.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css" integrity="sha256-wiz7ZSCn/btzhjKDQBms9Hx4sSeUYsDrTLg7roPstac=" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.1.1/animate.min.css" integrity="sha256-PR7ttpcvz8qrF57fur/yAx1qXMFJeJFiA6pSzWi0OIE=" crossorigin="anonymous">
<script class="next-config" data-name="main" type="application/json">{"hostname":"example.com","root":"/","images":"/images","scheme":"Gemini","darkmode":true,"version":"8.19.2","exturl":false,"sidebar":{"position":"left","display":"post","padding":18,"offset":12},"copycode":{"enable":false,"style":null},"fold":{"enable":false,"height":500},"bookmark":{"enable":false,"color":"#222","save":"auto"},"mediumzoom":false,"lazyload":false,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"stickytabs":false,"motion":{"enable":true,"async":false,"transition":{"menu_item":"fadeInDown","post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"i18n":{"placeholder":"Searching...","empty":"We didn't find any results for the search: ${query}","hits_time":"${hits} results found in ${time} ms","hits":"${hits} results found"},"path":"/search.xml","localsearch":{"enable":true,"trigger":"auto","top_n_per_article":1,"unescape":false,"preload":false}}</script><script src="/js/config.js"></script>
<meta property="og:type" content="website">
<meta property="og:title" content="ericasun的Hexo博客">
<meta property="og:url" content="http://example.com/index.html">
<meta property="og:site_name" content="ericasun的Hexo博客">
<meta property="og:locale" content="en_US">
<meta property="article:author" content="ericasun">
<meta name="twitter:card" content="summary">
<link rel="canonical" href="http://example.com/">
<script class="next-config" data-name="page" type="application/json">{"sidebar":"","isHome":true,"isPost":false,"lang":"en","comments":"","permalink":"","path":"index.html","title":""}</script>
<script class="next-config" data-name="calendar" type="application/json">""</script>
<title>ericasun的Hexo博客</title>
<noscript>
<link rel="stylesheet" href="/css/noscript.css">
</noscript>
</head>
<body itemscope itemtype="http://schema.org/WebPage" class="use-motion">
<div class="headband"></div>
<main class="main">
<div class="column">
<header class="header" itemscope itemtype="http://schema.org/WPHeader"><div class="site-brand-container">
<div class="site-nav-toggle">
<div class="toggle" aria-label="Toggle navigation bar" role="button">
<span class="toggle-line"></span>
<span class="toggle-line"></span>
<span class="toggle-line"></span>
</div>
</div>
<div class="site-meta">
<a href="/" class="brand" rel="start">
<i class="logo-line"></i>
<h1 class="site-title">ericasun的Hexo博客</h1>
<i class="logo-line"></i>
</a>
</div>
<div class="site-nav-right">
<div class="toggle popup-trigger" aria-label="Search" role="button">
<i class="fa fa-search fa-fw fa-lg"></i>
</div>
</div>
</div>
<nav class="site-nav">
<ul class="main-menu menu"><li class="menu-item menu-item-home"><a href="/" rel="section"><i class="fa fa-home fa-fw"></i>Home</a></li><li class="menu-item menu-item-about"><a href="/about/" rel="section"><i class="fa fa-user fa-fw"></i>About</a></li><li class="menu-item menu-item-tags"><a href="/tags/" rel="section"><i class="fa fa-tags fa-fw"></i>Tags</a></li><li class="menu-item menu-item-categories"><a href="/categories/" rel="section"><i class="fa fa-th fa-fw"></i>Categories</a></li><li class="menu-item menu-item-archives"><a href="/archives/" rel="section"><i class="fa fa-archive fa-fw"></i>Archives</a></li>
<li class="menu-item menu-item-search">
<a role="button" class="popup-trigger"><i class="fa fa-search fa-fw"></i>Search
</a>
</li>
</ul>
</nav>
<div class="search-pop-overlay">
<div class="popup search-popup"><div class="search-header">
<span class="search-icon">
<i class="fa fa-search"></i>
</span>
<div class="search-input-container">
<input autocomplete="off" autocapitalize="off" maxlength="80"
placeholder="Searching..." spellcheck="false"
type="search" class="search-input">
</div>
<span class="popup-btn-close" role="button">
<i class="fa fa-times-circle"></i>
</span>
</div>
<div class="search-result-container no-result">
<div class="search-result-icon">
<i class="fa fa-spinner fa-pulse fa-5x"></i>
</div>
</div>
</div>
</div>
</header>
<aside class="sidebar">
<div class="sidebar-inner sidebar-overview-active">
<ul class="sidebar-nav">
<li class="sidebar-nav-toc">
Table of Contents
</li>
<li class="sidebar-nav-overview">
Overview
</li>
</ul>
<div class="sidebar-panel-container">
<!--noindex-->
<div class="post-toc-wrap sidebar-panel">
</div>
<!--/noindex-->
<div class="site-overview-wrap sidebar-panel">
<div class="site-author animated" itemprop="author" itemscope itemtype="http://schema.org/Person">
<p class="site-author-name" itemprop="name">ericasun</p>
<div class="site-description" itemprop="description"></div>
</div>
<div class="site-state-wrap animated">
<nav class="site-state">
<div class="site-state-item site-state-posts">
<a href="/archives/">
<span class="site-state-item-count">28</span>
<span class="site-state-item-name">posts</span>
</a>
</div>
<div class="site-state-item site-state-categories">
<a href="/categories/">
<span class="site-state-item-count">4</span>
<span class="site-state-item-name">categories</span></a>
</div>
<div class="site-state-item site-state-tags">
<a href="/tags/">
<span class="site-state-item-count">14</span>
<span class="site-state-item-name">tags</span></a>
</div>
</nav>
</div>
<div class="links-of-author animated">
<span class="links-of-author-item">
<a href="https://github.com/ericasun" title="GitHub → https://github.com/ericasun" rel="noopener me" target="_blank"><i class="fab fa-github fa-fw"></i>GitHub</a>
</span>
<span class="links-of-author-item">
<a href="mailto:workhere2100@gmail.com" title="E-Mail → mailto:workhere2100@gmail.com" rel="noopener me" target="_blank"><i class="fa fa-envelope fa-fw"></i>E-Mail</a>
</span>
</div>
</div>
</div>
</div>
</aside>
</div>
<div class="main-inner index posts-expand">
<div class="post-block">
<article itemscope itemtype="http://schema.org/Article" class="post-content" lang="">
<link itemprop="mainEntityOfPage" href="http://example.com/2024/09/22/Other/Facebook%E6%B7%BB%E5%8A%A0%E5%8F%8C%E9%87%8D%E9%AA%8C%E8%AF%81/">
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="image" content="/images/avatar.gif">
<meta itemprop="name" content="ericasun">
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="ericasun的Hexo博客">
<meta itemprop="description" content="">
</span>
<span hidden itemprop="post" itemscope itemtype="http://schema.org/CreativeWork">
<meta itemprop="name" content="undefined | ericasun的Hexo博客">
<meta itemprop="description" content="">
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
<a href="/2024/09/22/Other/Facebook%E6%B7%BB%E5%8A%A0%E5%8F%8C%E9%87%8D%E9%AA%8C%E8%AF%81/" class="post-title-link" itemprop="url">Facebook添加双重验证</a>
</h2>
<div class="post-meta-container">
<div class="post-meta">
<span class="post-meta-item">
<span class="post-meta-item-icon">
<i class="far fa-calendar"></i>
</span>
<span class="post-meta-item-text">Posted on</span>
<time title="Created: 2024-09-22 16:21:28" itemprop="dateCreated datePublished" datetime="2024-09-22T16:21:28+08:00">2024-09-22</time>
</span>
<span class="post-meta-item">
<span class="post-meta-item-icon">
<i class="far fa-calendar-check"></i>
</span>
<span class="post-meta-item-text">Edited on</span>
<time title="Modified: 2025-05-16 13:21:56" itemprop="dateModified" datetime="2025-05-16T13:21:56+08:00">2025-05-16</time>
</span>
<span class="post-meta-item">
<span class="post-meta-item-icon">
<i class="far fa-folder"></i>
</span>
<span class="post-meta-item-text">In</span>
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/Other/" itemprop="url" rel="index"><span itemprop="name">Other</span></a>
</span>
</span>
<span id="/2024/09/22/Other/Facebook%E6%B7%BB%E5%8A%A0%E5%8F%8C%E9%87%8D%E9%AA%8C%E8%AF%81/" class="post-meta-item leancloud_visitors" data-flag-title="Facebook添加双重验证" title="Views">
<span class="post-meta-item-icon">
<i class="far fa-eye"></i>
</span>
<span class="post-meta-item-text">Views: </span>
<span class="leancloud-visitors-count"></span>
</span>
</div>
</div>
</header>
<div class="post-body" itemprop="articleBody">
<p>在 Facebook（Meta）账户上启用双重验证（2FA） 以提升安全性。主要内容包括：</p>
<ol>
<li><p>双重验证的作用：防止未经授权的登录，即使密码泄露也能保护账户。</p>
</li>
<li><p>设置步骤：通过手机短信、验证器应用（如 Google Authenticator）或物理安全密钥绑定 2FA。</p>
</li>
<li><p>备用方法：生成一次性备用代码，避免设备丢失时无法登录。</p>
</li>
<li><p>注意事项：建议绑定多设备并妥善保存备用代码，以防锁定账户。</p>
</li>
</ol>
<!--noindex-->
<div class="post-button">
<a class="btn" href="/2024/09/22/Other/Facebook%E6%B7%BB%E5%8A%A0%E5%8F%8C%E9%87%8D%E9%AA%8C%E8%AF%81/#more" rel="contents">
Read more »
</a>
</div>
<!--/noindex-->
</div>
<footer class="post-footer">
<div class="post-eof"></div>
</footer>
</article>
</div>
<div class="post-block">
<article itemscope itemtype="http://schema.org/Article" class="post-content" lang="">
<link itemprop="mainEntityOfPage" href="http://example.com/2024/05/01/international%20e-commerce/shopify/%E7%BB%93%E8%B4%A6%E6%97%B6%E9%99%A4%E4%BA%86%E7%BE%8E%E5%9B%BD%E7%9A%84%E5%9C%B0%E5%9D%80%EF%BC%8C%E5%85%B6%E4%BB%96%E5%9B%BD%E5%AE%B6%E7%9A%84%E5%9C%B0%E5%9D%80%EF%BC%8C%E5%A1%AB%E5%86%99%E5%AE%8C%E5%9C%B0%E5%9D%80%E5%90%8E%E6%97%A0%E6%B3%95%E8%AE%BE%E7%BD%AE%E8%BF%90%E8%B4%B9/">
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="image" content="/images/avatar.gif">
<meta itemprop="name" content="ericasun">
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="ericasun的Hexo博客">
<meta itemprop="description" content="">
</span>
<span hidden itemprop="post" itemscope itemtype="http://schema.org/CreativeWork">
<meta itemprop="name" content="undefined | ericasun的Hexo博客">
<meta itemprop="description" content="">
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
<a href="/2024/05/01/international%20e-commerce/shopify/%E7%BB%93%E8%B4%A6%E6%97%B6%E9%99%A4%E4%BA%86%E7%BE%8E%E5%9B%BD%E7%9A%84%E5%9C%B0%E5%9D%80%EF%BC%8C%E5%85%B6%E4%BB%96%E5%9B%BD%E5%AE%B6%E7%9A%84%E5%9C%B0%E5%9D%80%EF%BC%8C%E5%A1%AB%E5%86%99%E5%AE%8C%E5%9C%B0%E5%9D%80%E5%90%8E%E6%97%A0%E6%B3%95%E8%AE%BE%E7%BD%AE%E8%BF%90%E8%B4%B9/" class="post-title-link" itemprop="url">shopify结账时无法选择运费</a>
</h2>
<div class="post-meta-container">
<div class="post-meta">
<span class="post-meta-item">
<span class="post-meta-item-icon">
<i class="far fa-calendar"></i>
</span>
<span class="post-meta-item-text">Posted on</span>
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<p>Shopify 结账页面的国际运费设置问题，主要针对非美国地址无法正确计算运费的情况。</p>
<p>问题描述：用户填写非美国地址后，运费无法正常显示或设置失败。</p>
<p>解决方案：</p>
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<li><p>在 Shopify 后台 设置 > 配送 中添加目标国家/地区，并绑定运费规则。</p>
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<li><p>检查是否启用自动运费计算（如 Shopify Shipping 或第三方物流集成）。</p>
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<h1 id="1、解释为什么如下代码会打印-6-个-6"><a href="#1、解释为什么如下代码会打印-6-个-6" class="headerlink" title="1、解释为什么如下代码会打印 6 个 6"></a>1、解释为什么如下代码会打印 6 个 6</h1><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">let</span> i = <span class="number">0</span></span><br><span class="line"><span class="keyword">for</span>(i = <span class="number">0</span>; i<<span class="number">6</span>; i++){</span><br><span class="line"> <span class="built_in">setTimeout</span>(<span class="function">()=></span>{</span><br><span class="line"> <span class="variable language_">console</span>.<span class="title function_">log</span>(i)</span><br><span class="line"> },<span class="number">0</span>)</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p>SetTimeout在for循环之后才执行，那时候i为6，然后再打印出6次6</p>
<h1 id="2、写出让上面代码打印-0、1、2、3、4、5-的方法"><a href="#2、写出让上面代码打印-0、1、2、3、4、5-的方法" class="headerlink" title="2、写出让上面代码打印 0、1、2、3、4、5 的方法"></a>2、写出让上面代码打印 0、1、2、3、4、5 的方法</h1><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">for</span>(<span class="keyword">let</span> i = <span class="number">0</span>; i<<span class="number">6</span>; i++){</span><br><span class="line"> <span class="built_in">setTimeout</span>(<span class="function">()=></span>{</span><br><span class="line"> <span class="variable language_">console</span>.<span class="title function_">log</span>(i)</span><br><span class="line"> },<span class="number">0</span>)</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h1 id="3-、（可选内容）除了使用-for-let-配合，还有什么其他方法可以打印出-0、1、2、3、4、5，如果你能找到并写在博客里，可以得到五星好评"><a href="#3-、（可选内容）除了使用-for-let-配合，还有什么其他方法可以打印出-0、1、2、3、4、5，如果你能找到并写在博客里，可以得到五星好评" class="headerlink" title="3 、（可选内容）除了使用 for let 配合，还有什么其他方法可以打印出 0、1、2、3、4、5，如果你能找到并写在博客里，可以得到五星好评 :)"></a>3 、（可选内容）除了使用 for let 配合，还有什么其他方法可以打印出 0、1、2、3、4、5，如果你能找到并写在博客里，可以得到五星好评 :)</h1><h2 id="方法一："><a href="#方法一：" class="headerlink" title="方法一："></a>方法一：</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">let</span> i = <span class="number">0</span></span><br><span class="line"><span class="keyword">while</span>(<span class="number">1</span>){</span><br><span class="line"> <span class="variable language_">console</span>.<span class="title function_">log</span>(i)</span><br><span class="line"> i++</span><br><span class="line"> <span class="keyword">if</span>(i><span class="number">5</span>){</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h2 id="方法二："><a href="#方法二：" class="headerlink" title="方法二："></a>方法二：</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">let</span> i = <span class="number">0</span></span><br><span class="line"><span class="keyword">let</span> timer = <span class="built_in">setInterval</span>(<span class="function">()=></span>{ </span><br><span class="line"> <span class="keyword">if</span>(i<<span class="number">6</span>){</span><br><span class="line"> <span class="variable language_">console</span>.<span class="title function_">log</span>(i); </span><br><span class="line"> i++;</span><br><span class="line"> }<span class="keyword">else</span>{</span><br><span class="line"> <span class="variable language_">this</span>.<span class="property">timer</span> = <span class="literal">null</span>;</span><br><span class="line"> }</span><br><span class="line">}, <span class="number">0</span>);</span><br></pre></td></tr></table></figure>
<h2 id="方法三："><a href="#方法三：" class="headerlink" title="方法三："></a>方法三：</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">let</span> i = <span class="keyword">new</span> <span class="title class_">Array</span>(<span class="number">6</span>).<span class="title function_">fill</span>(<span class="string">''</span>)</span><br><span class="line">i.<span class="title function_">map</span>(<span class="function">(<span class="params">k,j</span>)=></span>{</span><br><span class="line"> <span class="variable language_">console</span>.<span class="title function_">log</span>(j);</span><br><span class="line">})</span><br></pre></td></tr></table></figure>
<h2 id="方法四："><a href="#方法四：" class="headerlink" title="方法四："></a>方法四：</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">let</span> i = <span class="number">0</span></span><br><span class="line"><span class="keyword">switch</span> (i){</span><br><span class="line"> <span class="keyword">case</span> <span class="number">0</span>:<span class="variable language_">console</span>.<span class="title function_">log</span>(i);i++;</span><br><span class="line"> <span class="keyword">case</span> <span class="number">1</span>:<span class="variable language_">console</span>.<span class="title function_">log</span>(i);i++;</span><br><span class="line"> <span class="keyword">case</span> <span class="number">2</span>:<span class="variable language_">console</span>.<span class="title function_">log</span>(i);i++;</span><br><span class="line"> <span class="keyword">case</span> <span class="number">3</span>:<span class="variable language_">console</span>.<span class="title function_">log</span>(i);i++;</span><br><span class="line"> <span class="keyword">case</span> <span class="number">4</span>:<span class="variable language_">console</span>.<span class="title function_">log</span>(i);i++;</span><br><span class="line"> <span class="keyword">case</span> <span class="number">5</span>:<span class="variable language_">console</span>.<span class="title function_">log</span>(i);<span class="keyword">break</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<h1 id="1、jQuery-如何获取元素"><a href="#1、jQuery-如何获取元素" class="headerlink" title="1、jQuery 如何获取元素"></a>1、jQuery 如何获取元素</h1><h2 id="1-1-选择表达式可以是CSS选择器："><a href="#1-1-选择表达式可以是CSS选择器：" class="headerlink" title="1.1 选择表达式可以是CSS选择器："></a>1.1 选择表达式可以是CSS选择器：</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">　$(<span class="variable language_">document</span>) <span class="comment">//选择整个文档对象</span></span><br><span class="line"></span><br><span class="line">　$(<span class="string">'#myId'</span>) <span class="comment">//选择ID为myId的网页元素</span></span><br><span class="line"></span><br><span class="line">　$(<span class="string">'div.myClass'</span>) <span class="comment">// 选择class为myClass的div元素</span></span><br><span class="line"></span><br><span class="line">　$(<span class="string">'input[name=first]'</span>) <span class="comment">// 选择name属性等于first的input元素</span></span><br></pre></td></tr></table></figure>
<h2 id="1-2-jQuery特有的表达式："><a href="#1-2-jQuery特有的表达式：" class="headerlink" title="1.2 jQuery特有的表达式："></a>1.2 jQuery特有的表达式：</h2><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">$(<span class="string">'a:first'</span>) <span class="comment">//选择网页中第一个a元素</span></span><br><span class="line"></span><br><span class="line">$(<span class="string">'tr:odd'</span>) <span class="comment">//选择表格的奇数行</span></span><br><span class="line"></span><br><span class="line">$(<span class="string">'#myForm :input'</span>) <span class="comment">// 选择表单中的input元素</span></span><br><span class="line"></span><br><span class="line">$(<span class="string">'div:visible'</span>) <span class="comment">//选择可见的div元素</span></span><br><span class="line"></span><br><span class="line">$(<span class="string">'div:gt(2)'</span>) <span class="comment">// 选择所有的div元素，除了前三个</span></span><br><span class="line"></span><br><span class="line">$(<span class="string">'div:animated'</span>) <span class="comment">// 选择当前处于动画状态的div元素</span></span><br></pre></td></tr></table></figure>
<h1 id="2、jQuery-的链式操作是怎样的"><a href="#2、jQuery-的链式操作是怎样的" class="headerlink" title="2、jQuery 的链式操作是怎样的"></a>2、jQuery 的链式操作是怎样的</h1><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$(<span class="string">'div'</span>).<span class="title function_">find</span>(<span class="string">'h3'</span>).<span class="title function_">eq</span>(<span class="number">2</span>).<span class="title function_">html</span>(<span class="string">'Hello'</span>);</span><br></pre></td></tr></table></figure>
<p>分解开来，就是下面这样：</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">　$(<span class="string">'div'</span>) <span class="comment">//找到div元素</span></span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">find</span>(<span class="string">'h3'</span>) <span class="comment">//选择其中的h3元素</span></span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">eq</span>(<span class="number">2</span>) <span class="comment">//选择第3个h3元素</span></span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">html</span>(<span class="string">'Hello'</span>); <span class="comment">//将它的内容改为Hello</span></span><br></pre></td></tr></table></figure>
<p>jQuery还提供了.end()方法，使得结果集可以后退一步：</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">　　$(<span class="string">'div'</span>)</span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">find</span>(<span class="string">'h3'</span>)</span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">eq</span>(<span class="number">2</span>)</span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">html</span>(<span class="string">'Hello'</span>)</span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">end</span>() <span class="comment">//退回到选中所有的h3元素的那一步</span></span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">eq</span>(<span class="number">0</span>) <span class="comment">//选中第一个h3元素</span></span><br><span class="line"></span><br><span class="line">　　　.<span class="title function_">html</span>(<span class="string">'World'</span>); <span class="comment">//将它的内容改为World</span></span><br></pre></td></tr></table></figure>
<h1 id="3、jQuery-如何创建元素"><a href="#3、jQuery-如何创建元素" class="headerlink" title="3、jQuery 如何创建元素"></a>3、jQuery 如何创建元素</h1><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">$(<span class="string">'<p>Hello</p>'</span>);</span><br><span class="line"></span><br><span class="line">$(<span class="string">'<li class="new">new list item</li>'</span>);</span><br><span class="line"></span><br><span class="line">$(<span class="string">'ul'</span>).<span class="title function_">append</span>(<span class="string">'<li>list item</li>'</span>);</span><br></pre></td></tr></table></figure>
<h1 id="4、jQuery-如何移动元素"><a href="#4、jQuery-如何移动元素" class="headerlink" title="4、jQuery 如何移动元素"></a>4、jQuery 如何移动元素</h1><p>假定我们选中了一个div元素，需要把它移动到p元素后面。<br>第一种方法是使用.insertAfter()，把div元素移动p元素后面：</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$(<span class="string">'div'</span>).<span class="title function_">insertAfter</span>($(<span class="string">'p'</span>));</span><br></pre></td></tr></table></figure>
<p>第二种方法是使用.after()，把p元素加到div元素前面：</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">　$(<span class="string">'p'</span>).<span class="title function_">after</span>($(<span class="string">'div'</span>));</span><br></pre></td></tr></table></figure>
<h1 id="5、jQuery-取值和赋值"><a href="#5、jQuery-取值和赋值" class="headerlink" title="5、jQuery 取值和赋值"></a>5、jQuery 取值和赋值</h1><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">$(<span class="string">'h1'</span>).<span class="title function_">html</span>(); <span class="comment">//html()没有参数，表示取出h1的值</span></span><br><span class="line"></span><br><span class="line">$(<span class="string">'h1'</span>).<span class="title function_">html</span>(<span class="string">'Hello'</span>); <span class="comment">//html()有参数Hello，表示对h1进行赋值</span></span><br></pre></td></tr></table></figure>
<p>常见的取值和赋值函数如下：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">　.html() 取出或设置html内容</span><br><span class="line"></span><br><span class="line">　.text() 取出或设置text内容</span><br><span class="line"></span><br><span class="line">　.attr() 取出或设置某个属性的值</span><br><span class="line"></span><br><span class="line">　.width() 取出或设置某个元素的宽度</span><br><span class="line"></span><br><span class="line">　.height() 取出或设置某个元素的高度</span><br><span class="line"></span><br><span class="line">　.val() 取出某个表单元素的值</span><br></pre></td></tr></table></figure>
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<h1 id="1、事件捕获"><a href="#1、事件捕获" class="headerlink" title="1、事件捕获"></a>1、事件捕获</h1><p>捕获型事件(event capturing)：事件从最不精确的对象(document 对象)开始触发，然后到最精确(也可以在窗口级别捕获事件，不过必须由开发人员特别指定)</p>
<h1 id="2、事件冒泡"><a href="#2、事件冒泡" class="headerlink" title="2、事件冒泡"></a>2、事件冒泡</h1><p>冒泡型事件：事件按照从最特定的事件目标到最不特定的事件目标(document对象)的顺序触发。</p>
<h1 id="3、捕获和冒泡顺序"><a href="#3、捕获和冒泡顺序" class="headerlink" title="3、捕获和冒泡顺序"></a>3、捕获和冒泡顺序</h1><p>w3c规定了，任何发生在w3c事件模型中的事件，首是进入捕获阶段，直到达到目标元素，再进入冒泡阶段。绑定在被点击元素的事件是按照代码的顺序发生的。<br>冒泡，它就像鱼儿吐泡泡一样，从下到上。<br>从祖先元素开始慢慢找，最后找到我们的点击目标，这个行为不就像警察叔叔抓坏人一样，逐渐的缩小抓捕范围，最后确定到某一个人身上，所以这个叫做捕获。</p>
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<p>事件委托还有一个名字叫事件代理，JS高程上讲：事件委托就是利用事件冒泡，只制定一个时间处理程序，就可以管理某一类型的所有事件。我用取快递来解释这个现象： 有三个同事预计会在周一收到快递。为签收快递，有两种办法：一是三个人在公司门口等快递；二是委托给前台代为签收。现实当中，我们大都采用委托的方案。前台收到快递后，她会判断收件人是谁，然后按照收件人的要求签收，甚至代为付款。这种方案还有一个优势，那就是即使公司里来了新员工（不管多少），前台也会在收到寄给新员工的快递后核实并代为签收。</p>
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<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/** 模擬 Model, View, Controller */</span></span><br><span class="line"><span class="keyword">var</span> M = {}, V = {}, C = {};</span><br><span class="line"></span><br><span class="line"><span class="comment">/** Model 負責存放資料 */</span></span><br><span class="line">M.<span class="property">data</span> = <span class="string">"hello world"</span>;</span><br><span class="line"></span><br><span class="line"><span class="comment">/** View 負責將資料輸出到螢幕上 */</span></span><br><span class="line">V.<span class="property">render</span> = <span class="function">(<span class="params">M</span>) =></span> { <span class="title function_">alert</span>(M.<span class="property">data</span>); }</span><br><span class="line"></span><br><span class="line"><span class="comment">/** Controller 作為一個 M 和 V 的橋樑 */</span></span><br><span class="line">C.<span class="property">handleOnload</span> = <span class="function">() =></span> { V.<span class="title function_">render</span>(M); }</span><br><span class="line"></span><br><span class="line"><span class="comment">/** 在網頁讀取的時候呼叫 Controller */</span></span><br><span class="line"><span class="variable language_">window</span>.<span class="property">onload</span> = C.<span class="property">handleOnload</span>;</span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> m={</span><br><span class="line"> data={},</span><br><span class="line"> <span class="title function_">create</span>(<span class="params"></span>){},</span><br><span class="line"> <span class="title function_">delete</span>(<span class="params"></span>){},</span><br><span class="line"> <span class="title function_">update</span>(<span class="params"></span>){},</span><br><span class="line"> <span class="title function_">get</span>(<span class="params"></span>){}</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> v={</span><br><span class="line"> <span class="attr">el</span>:<span class="literal">null</span>,</span><br><span class="line"> <span class="attr">html</span>:<span class="string">`代码`</span>,</span><br><span class="line"> <span class="title function_">init</span>(<span class="params">container</span>){</span><br><span class="line"> v.<span class="property">el</span>=$(container)</span><br><span class="line"> },</span><br><span class="line"> <span class="title function_">render</span>(<span class="params">n</span>){}</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> c={</span><br><span class="line"> <span class="title function_">init</span>(<span class="params">constainer</span>){}</span><br><span class="line"> <span class="attr">events</span>:{事件}</span><br><span class="line"> <span class="title function_">add</span>(<span class="params"></span>){执行}</span><br><span class="line"> <span class="title function_">minus</span>(<span class="params"></span>){执行}</span><br><span class="line"> <span class="title function_">update</span>(<span class="params"></span>){执行}</span><br><span class="line"> <span class="title function_">get</span>(<span class="params"></span>){执行}</span><br><span class="line"> <span class="title function_">autoBindEvents</span>(<span class="params"></span>){逻辑}</span><br><span class="line">}</span><br><span class="line">————————————————</span><br><span class="line">版权声明：本文为<span class="variable constant_">CSDN</span>博主「小峰同学的前端之路」的原创文章，遵循<span class="variable constant_">CC</span> <span class="number">4.0</span> <span class="variable constant_">BY</span>-<span class="variable constant_">SA</span>版权协议，转载请附上原文出处链接及本声明。</span><br><span class="line">原文链接：<span class="attr">https</span>:<span class="comment">//blog.csdn.net/abc465200/article/details/106731890</span></span><br></pre></td></tr></table></figure>
<h1 id="2、EventBus-有哪些-API，是做什么用的，给出伪代码示例"><a href="#2、EventBus-有哪些-API，是做什么用的，给出伪代码示例" class="headerlink" title="2、EventBus 有哪些 API，是做什么用的，给出伪代码示例"></a>2、EventBus 有哪些 API，是做什么用的，给出伪代码示例</h1><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><span class="line">_self.<span class="property">getEventBus</span></span><br><span class="line"> 方法：<span class="attr">getEventBus</span>:<span class="keyword">function</span>(<span class="params"></span>){}</span><br><span class="line"> 描述：直接返回前端<span class="title class_">EventBus</span>对象，不推荐直接使用。</span><br><span class="line"> </span><br><span class="line">_self.<span class="property">subscribeEvent</span></span><br><span class="line"> 方法：<span class="attr">subscribeEvent</span>:<span class="keyword">function</span>(<span class="params">event,fn,pointcut</span>){}</span><br><span class="line"> 描述：注册事件，并指定实现方法和插入点</span><br><span class="line"> 参数：event：字符串形式事件名，命名规则为<span class="title class_">Event</span>或<span class="title class_">ActionEvent</span>结尾</span><br><span class="line"> fn：实现方法</span><br><span class="line"> 插入点类型：after、overwrite、before</span><br><span class="line"> </span><br><span class="line">_self.<span class="property">unSubscribeEvent</span></span><br><span class="line"> 方法：<span class="attr">unSubscribeEvent</span>:<span class="keyword">function</span>(<span class="params">event</span>){}</span><br><span class="line"> 描述：取消注册事件</span><br><span class="line"> 参数：event：字符串形式事件名，命名规则为<span class="title class_">Event</span>或<span class="title class_">ActionEvent</span>结尾</span><br><span class="line"> </span><br><span class="line">_self.<span class="property">fireEvent</span></span><br><span class="line"> 方法：<span class="attr">fireEvent</span>:<span class="keyword">function</span>(<span class="params">event</span>){}</span><br><span class="line"> 描述：触发某个具体事件，执行这个事件对于的实现方法队列</span><br><span class="line"> 参数：event：字符串形式事件名，命名规则为<span class="title class_">Event</span>或<span class="title class_">ActionEvent</span>结尾</span><br><span class="line"> 其他参数：可以增加一些后续参数</span><br><span class="line"> </span><br><span class="line"><span class="title class_">Handler</span>实现说明：</span><br><span class="line"> 参数：接收fireEvent方法传递过来的参数</span><br><span class="line"> 特殊参数e：只有按钮绑定的页面功能才有值，手工调用不会有e的。页面功能代码生成时，默认会生成这个e，值为jquery.<span class="property">event</span></span><br><span class="line"> 返回值：无返回值的处理，只能通过返回值确定是否继续执行后续的方法队列</span><br><span class="line"> <span class="literal">true</span>/无：继续执行后续的实现方法队列</span><br><span class="line"> <span class="literal">false</span>：停止执行后续的实现方法队列 </span><br><span class="line"> 其他：返回<span class="literal">true</span></span><br><span class="line"> <span class="title class_">Handle</span>队列中数据的传递：只能利用页面的全局变量，本身没有提供处理机制</span><br><span class="line">————————————————</span><br><span class="line">版权声明：本文为<span class="variable constant_">CSDN</span>博主「小峰同学的前端之路」的原创文章，遵循<span class="variable constant_">CC</span> <span class="number">4.0</span> <span class="variable constant_">BY</span>-<span class="variable constant_">SA</span>版权协议，转载请附上原文出处链接及本声明。</span><br><span class="line">原文链接：<span class="attr">https</span>:<span class="comment">//blog.csdn.net/abc465200/article/details/106731890</span></span><br></pre></td></tr></table></figure>
<h1 id="3、表驱动编程是做什么的（可以自己查查资料）"><a href="#3、表驱动编程是做什么的（可以自己查查资料）" class="headerlink" title="3、表驱动编程是做什么的（可以自己查查资料）"></a>3、表驱动编程是做什么的（可以自己查查资料）</h1><p>Table-Driven Approach<br>解决if else面对多种情况的情形，以表的形式进行获取数据，通过下标索引来查</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">methods{</span><br><span class="line"> <span class="title function_">add</span>(<span class="params"></span>){执行}</span><br><span class="line"> <span class="title function_">delete</span>(<span class="params"></span>){执行}</span><br><span class="line"> <span class="title function_">minus</span>(<span class="params"></span>){执行}</span><br><span class="line"> ...</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h1 id="4、我是如何理解模块化的"><a href="#4、我是如何理解模块化的" class="headerlink" title="4、我是如何理解模块化的"></a>4、我是如何理解模块化的</h1><p>模块化就是把一个模块的代码放在一个文件夹里，再进行引入，简化了代码之间的影响</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">let</span> string=<span class="string">`内容`</span></span><br><span class="line"><span class="keyword">import</span> <span class="keyword">default</span> string<span class="comment">//导出</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> $ <span class="keyword">from</span> <span class="string">`string`</span><span class="comment">//引入</span></span><br></pre></td></tr></table></figure>
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<p>如果 .parent 的 height 不写，你只需要 padding: 10px 0; 就能将 .child 垂直居中；<br><br>如果 .parent 的 height 写死了，就很难把 .child 居中，以下是垂直居中的方法。<br><br>忠告：能不写 height 就千万别写 height。<br></p>
<h1 id="​​​​​​​1、table自带功能"><a href="#​​​​​​​1、table自带功能" class="headerlink" title="​​​​​​​1、table自带功能"></a>​​​​​​​1、table自带功能</h1><p><strong>代码</strong></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">// html</span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">table</span> <span class="attr">class</span>=<span class="string">"parent"</span>></span> </span><br><span class="line"> <span class="tag"><<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">td</span> <span class="attr">class</span>=<span class="string">"child"</span>></span></span><br><span class="line"> 【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】</span><br><span class="line"> <span class="tag"></<span class="name">td</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">tr</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">table</span>></span></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="selector-class">.parent</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">1px</span> solid red;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">600px</span>;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.child</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">1px</span> solid green;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>效果图</strong></p>
<p><img src="/2024/04/02/Font-end/css/%E4%B8%83%E7%A7%8D%E6%96%B9%E5%BC%8F%E5%AE%9E%E7%8E%B0%E5%9E%82%E7%9B%B4%E5%B1%85%E4%B8%AD/%E2%80%8B%E2%80%8B%E2%80%8B%E2%80%8B%E2%80%8B%E2%80%8B%E2%80%8B01table%E8%87%AA%E5%B8%A6%E5%8A%9F%E8%83%BD.png" alt="​​​​​​​01table自带功能"></p>
<h1 id="2、100-高度的-after-before-加上-inline-block"><a href="#2、100-高度的-after-before-加上-inline-block" class="headerlink" title="2、100% 高度的 after before 加上 inline block"></a>2、100% 高度的 after before 加上 inline block</h1><p><strong>代码</strong></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">// html</span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"parent"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">span</span> <span class="attr">class</span>=<span class="string">before</span>></span><span class="tag"></<span class="name">span</span>></span><span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"child"</span>></span></span><br><span class="line"> 【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】</span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span><span class="tag"><<span class="name">span</span> <span class="attr">class</span>=<span class="string">after</span>></span><span class="tag"></<span class="name">span</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line"><span class="selector-class">.parent</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">3px</span> solid red;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">600px</span>;</span><br><span class="line"> <span class="attribute">text-align</span>: center;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.child</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">3px</span> solid black;</span><br><span class="line"> <span class="attribute">display</span>: inline-block;</span><br><span class="line"> <span class="attribute">width</span>: <span class="number">300px</span>;</span><br><span class="line"> <span class="attribute">vertical-align</span>: middle;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.parent</span> <span class="selector-class">.before</span>{</span><br><span class="line"> <span class="attribute">outline</span>: <span class="number">3px</span> solid red;</span><br><span class="line"> <span class="attribute">display</span>: inline-block;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">100%</span>;</span><br><span class="line"> <span class="attribute">vertical-align</span>: middle;</span><br><span class="line">}</span><br><span class="line"><span class="selector-class">.parent</span> <span class="selector-class">.after</span>{</span><br><span class="line"> <span class="attribute">outline</span>: <span class="number">3px</span> solid red;</span><br><span class="line"> <span class="attribute">display</span>: inline-block;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">100%</span>;</span><br><span class="line"> <span class="attribute">vertical-align</span>: middle;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>效果图</strong></p>
<p><img src="/2024/04/02/Font-end/css/%E4%B8%83%E7%A7%8D%E6%96%B9%E5%BC%8F%E5%AE%9E%E7%8E%B0%E5%9E%82%E7%9B%B4%E5%B1%85%E4%B8%AD/%E2%80%8B02%E5%8A%A0%E4%B8%8AinlineBlock.png" alt="​02加上inlineBlock"></p>
<p><strong>优化版</strong></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">// html</span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"parent"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"child"</span>></span></span><br><span class="line"> 【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】</span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line"><span class="selector-class">.parent</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">3px</span> solid red;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">600px</span>;</span><br><span class="line"> <span class="attribute">text-align</span>: center;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.child</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">3px</span> solid black;</span><br><span class="line"> <span class="attribute">display</span>: inline-block;</span><br><span class="line"> <span class="attribute">width</span>: <span class="number">300px</span>;</span><br><span class="line"> <span class="attribute">vertical-align</span>: middle;</span><br><span class="line">}</span><br><span class="line"></span><br><span class="line"><span class="selector-class">.parent</span><span class="selector-pseudo">:before</span>{</span><br><span class="line"> <span class="attribute">content</span>:<span class="string">''</span>;</span><br><span class="line"> <span class="attribute">outline</span>: <span class="number">3px</span> solid red;</span><br><span class="line"> <span class="attribute">display</span>: inline-block;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">100%</span>;</span><br><span class="line"> <span class="attribute">vertical-align</span>: middle;</span><br><span class="line">}</span><br><span class="line"><span class="selector-class">.parent</span><span class="selector-pseudo">:after</span>{</span><br><span class="line"> <span class="attribute">content</span>:<span class="string">''</span>;</span><br><span class="line"> <span class="attribute">outline</span>: <span class="number">3px</span> solid red;</span><br><span class="line"> <span class="attribute">display</span>: inline-block;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">100%</span>;</span><br><span class="line"> <span class="attribute">vertical-align</span>: middle;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<h1 id="3、div-装成-table"><a href="#3、div-装成-table" class="headerlink" title="3、div 装成 table"></a>3、div 装成 table</h1><p><strong>代码</strong></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">// html</span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"table"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"td"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"child"</span>></span></span><br><span class="line"> 【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】</span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line">// css</span><br><span class="line"><span class="selector-tag">div</span><span class="selector-class">.table</span>{</span><br><span class="line"> <span class="attribute">display</span>: table;</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">1px</span> solid red;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">600px</span>;</span><br><span class="line">}</span><br><span class="line"><span class="selector-tag">div</span><span class="selector-class">.td</span>{</span><br><span class="line"> <span class="attribute">display</span>: table-cell;</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">1px</span> solid blue;</span><br><span class="line"> <span class="attribute">vertical-align</span>: middle;</span><br><span class="line">}</span><br><span class="line"><span class="selector-class">.child</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">10px</span> solid black;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>效果图</strong></p>
<p><img src="/2024/04/02/Font-end/css/%E4%B8%83%E7%A7%8D%E6%96%B9%E5%BC%8F%E5%AE%9E%E7%8E%B0%E5%9E%82%E7%9B%B4%E5%B1%85%E4%B8%AD/03div%E8%A3%85%E6%88%90table.png" alt="03div 装成 table"></p>
<h1 id="4、margin-top-50"><a href="#4、margin-top-50" class="headerlink" title="4、margin-top -50%"></a>4、margin-top -50%</h1><p><strong>代码</strong></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">// html</span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"parent"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"child"</span>></span></span><br><span class="line"> 【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】</span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">// css</span><br><span class="line"><span class="selector-class">.parent</span>{</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">600px</span>;</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">1px</span> solid red;</span><br><span class="line"> <span class="attribute">position</span>: relative;</span><br><span class="line">}</span><br><span class="line"><span class="selector-class">.child</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">1px</span> solid green;</span><br><span class="line"> <span class="attribute">width</span>: <span class="number">300px</span>;</span><br><span class="line"> <span class="attribute">position</span>: absolute;</span><br><span class="line"> <span class="attribute">top</span>: <span class="number">50%</span>;</span><br><span class="line"> <span class="attribute">left</span>: <span class="number">50%</span>;</span><br><span class="line"> <span class="attribute">margin-left</span>: -<span class="number">150px</span>;</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">100px</span>;</span><br><span class="line"> <span class="attribute">margin-top</span>: -<span class="number">50px</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>效果图</strong></p>
<p><img src="/2024/04/02/Font-end/css/%E4%B8%83%E7%A7%8D%E6%96%B9%E5%BC%8F%E5%AE%9E%E7%8E%B0%E5%9E%82%E7%9B%B4%E5%B1%85%E4%B8%AD/%0B%0B%0B%0B%0B%0B%0B%0B04margin-top-50%25.png" alt="​​​​​​​04margin-top -50%.png"></p>
<h1 id="5、translate-50"><a href="#5、translate-50" class="headerlink" title="5、translate -50%"></a>5、translate -50%</h1><p><strong>代码</strong></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">// html</span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"parent"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"child"</span>></span></span><br><span class="line"> 【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】</span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br></pre></td></tr></table></figure>
<figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">// css</span><br><span class="line"><span class="selector-class">.parent</span>{</span><br><span class="line"> <span class="attribute">height</span>: <span class="number">600px</span>;</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">1px</span> solid red;</span><br><span class="line"> <span class="attribute">position</span>: relative;</span><br><span class="line">}</span><br><span class="line"><span class="selector-class">.child</span>{</span><br><span class="line"> <span class="attribute">border</span>: <span class="number">1px</span> solid green;</span><br><span class="line"> <span class="attribute">position</span>: absolute;</span><br><span class="line"> <span class="attribute">top</span>: <span class="number">50%</span>;</span><br><span class="line"> <span class="attribute">left</span>: <span class="number">50%</span>;</span><br><span class="line"> <span class="attribute">transform</span>: <span class="built_in">translate</span>(-<span class="number">50%</span>,-<span class="number">50%</span>);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<p><strong>效果图</strong></p>
<h2 id><a href="#" class="headerlink" title></a><img src="/2024/04/02/Font-end/css/%E4%B8%83%E7%A7%8D%E6%96%B9%E5%BC%8F%E5%AE%9E%E7%8E%B0%E5%9E%82%E7%9B%B4%E5%B1%85%E4%B8%AD/%0B%0B%0B%0B%0B%0B%0B%0B05translate-50%25.png" alt="05translate -50%.png"></h2><h1 id="6、absolute-margin-auto"><a href="#6、absolute-margin-auto" class="headerlink" title="6、absolute margin auto"></a>6、absolute margin auto</h1><p><strong>代码</strong></p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">// html</span><br><span class="line"><span class="tag"><<span class="name">body</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"parent"</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">div</span> <span class="attr">class</span>=<span class="string">"child"</span>></span></span><br><span class="line"> 【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】【垂直居中】</span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"> <span class="tag"></<span class="name">div</span>></span></span><br><span class="line"><span class="tag"></<span class="name">body</span>></span></span><br></pre></td></tr></table></figure>