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<!DOCTYPE html>
<html class="theme-next mist" lang="zh-cn,en">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<meta name="theme-color" content="#222">
<meta name="google-site-verification" content="668o7JYPf2OrZcw2TaXzygnYV_qteQouRuPIFYQvi0k" />
<meta name="baidu-site-verification" content="SDwBN8XAYL" />
<script src="/lib/pace/pace.min.js?v=1.0.2"></script>
<link href="/lib/pace/pace-theme-minimal.min.css?v=1.0.2" rel="stylesheet">
<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
<link href="https://cdn.bootcss.com/fancybox/3.3.5/jquery.fancybox.min.css" rel="stylesheet" type="text/css" />
<link href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2" rel="stylesheet" type="text/css" />
<link href="/css/main.css?v=5.1.4" rel="stylesheet" type="text/css" />
<link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png?v=5.1.4">
<link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png?v=5.1.4">
<link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png?v=5.1.4">
<link rel="mask-icon" href="/images/logo.svg?v=5.1.4" color="#222">
<meta name="keywords" content="Hexo, NexT, blog, 苏晨小雨, 苏晨小语, suchenrain" />
<meta property="og:type" content="website">
<meta property="og:title" content="ZChen">
<meta property="og:url" content="https://suchenrain.github.io/index.html">
<meta property="og:site_name" content="ZChen">
<meta property="og:locale" content="zh-cn">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="ZChen">
<script type="text/javascript" id="hexo.configurations">
var NexT = window.NexT || {};
var CONFIG = {
root: '/',
scheme: 'Mist',
version: '5.1.4',
sidebar: {"position":"left","display":"post","offset":12,"b2t":false,"scrollpercent":true,"onmobile":false},
fancybox: true,
tabs: true,
motion: {"enable":false,"async":true,"transition":{"post_block":"fadeIn","post_header":"slideDownIn","post_body":"slideDownIn","coll_header":"slideLeftIn","sidebar":"slideUpIn"}},
duoshuo: {
userId: '0',
author: 'ZChen'
},
algolia: {
applicationID: '',
apiKey: '',
indexName: '',
hits: {"per_page":10},
labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
}
};
</script>
<link rel="canonical" href="https://suchenrain.github.io/"/>
<title>ZChen - Fake it until you make it</title>
</head>
<body itemscope itemtype="http://schema.org/WebPage" lang="zh-cn">
<div class="container sidebar-position-left
page-home">
<div class="headband"></div>
<header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
<div class="header-inner"><div class="site-brand-wrapper">
<div class="site-meta ">
<div class="custom-logo-site-title">
<a href="/" class="brand" rel="start">
<span class="logo-line-before"><i></i></span>
<span class="site-title">ZChen</span>
<span class="logo-line-after"><i></i></span>
</a>
</div>
<h1 class="site-subtitle" itemprop="description">Fake it until you make it</h1>
</div>
<div class="site-nav-toggle">
<button>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
</button>
</div>
</div>
<nav class="site-nav">
<ul id="menu" class="menu">
<li class="menu-item menu-item-home">
<a href="/" rel="section">
<i class="menu-item-icon fa fa-fw fa-home"></i> <br />
首页
</a>
</li>
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<a href="/categories/" rel="section">
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分类
</a>
</li>
<li class="menu-item menu-item-tags">
<a href="/tags/" rel="section">
<i class="menu-item-icon fa fa-fw fa-tags"></i> <br />
标签
</a>
</li>
<li class="menu-item menu-item-archives">
<a href="/archives/" rel="section">
<i class="menu-item-icon fa fa-fw fa-archive"></i> <br />
时间轴
</a>
</li>
<li class="menu-item menu-item-about">
<a href="/about/" rel="section">
<i class="menu-item-icon fa fa-fw fa-user"></i> <br />
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</a>
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<a href="javascript:;" class="popup-trigger">
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搜索
</a>
</li>
</ul>
<div class="site-search">
<div class="popup search-popup local-search-popup">
<div class="local-search-header clearfix">
<span class="search-icon">
<i class="fa fa-search"></i>
</span>
<span class="popup-btn-close">
<i class="fa fa-times-circle"></i>
</span>
<div class="local-search-input-wrapper">
<input autocomplete="off"
placeholder="搜索..." spellcheck="false"
type="text" id="local-search-input">
</div>
</div>
<div id="local-search-result"></div>
</div>
</div>
</nav>
</div>
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</div>
</header>
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<section id="posts" class="posts-expand">
<article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
<div class="post-block">
<link itemprop="mainEntityOfPage" href="https://suchenrain.github.io/posts/52887/">
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="ZChen">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/zchen.jpg">
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="ZChen">
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/posts/52887/" itemprop="url">你需要知道的HTML知识</a></h2>
<div class="mobile-post-meta">
<span class="created-time">
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<time title="创建于" itemprop="dateCreated datePublished" datetime="2019-12-29T19:23:34+08:00">
2019-12-29 19:23
</time>
</span>
</div>
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<span class="post-time">
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<span class="post-meta-item-text">发表于</span>
<time title="创建于" itemprop="dateCreated datePublished" datetime="2019-12-29T19:23:34+08:00">
2019-12-29 19:23
</time>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-calendar-check-o"></i>
</span>
<span class="post-meta-item-text">更新于:</span>
<time title="更新于" itemprop="dateModified" datetime="2020-01-02T18:33:02+08:00">
2020-01-02 18:33
</time>
</span>
<span class="post-category" >
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-folder-o"></i>
</span>
<span class="post-meta-item-text">分类于</span>
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/前端之路/" itemprop="url" rel="index">
<span itemprop="name">前端之路</span>
</a>
</span>
</span>
<div class="post-wordcount">
<span class="post-meta-item-icon">
<i class="fa fa-file-word-o"></i>
</span>
<span class="post-meta-item-text">字数统计:</span>
<span title="字数统计">
2,252
</span>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-clock-o"></i>
</span>
<span class="post-meta-item-text">阅读时长 ≈</span>
<span title="阅读时长">
8 分钟
</span>
</div>
</div>
</header>
<div class="post-body mask-content " itemprop="articleBody" data-license="nd">
<p>前端三大件：<code>HTML</code>+<code>CSS</code>+<code>JS</code></p>
<p>今天我们就来说一说<code>HTML</code>，可能很多人觉得这个太简单了，就是平常写网页的一堆元素。然而越是基础的东西人们越容易忽略，所以特意梳理了下相关知识，希望加深对它的理解。</p>
<p><strong>如果你觉得本文对你有所帮助，欢迎猛戳</strong> :star: <a href="https://github.com/suchenrain/FrontEnd-Roadmap" target="_blank" rel="noopener">Github(梳理前端知识体系全集)</a></p>
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<article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
<div class="post-block">
<link itemprop="mainEntityOfPage" href="https://suchenrain.github.io/posts/25206/">
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="ZChen">
<meta itemprop="description" content="">
<meta itemprop="image" content="/images/zchen.jpg">
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="ZChen">
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/posts/25206/" itemprop="url">深入理解跨域及常见解决方法</a></h2>
<div class="mobile-post-meta">
<span class="created-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<time title="创建于" itemprop="dateCreated datePublished" datetime="2019-10-09T18:23:34+08:00">
2019-10-09 18:23
</time>
</span>
</div>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">发表于</span>
<time title="创建于" itemprop="dateCreated datePublished" datetime="2019-10-09T18:23:34+08:00">
2019-10-09 18:23
</time>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-calendar-check-o"></i>
</span>
<span class="post-meta-item-text">更新于:</span>
<time title="更新于" itemprop="dateModified" datetime="2020-01-02T18:33:02+08:00">
2020-01-02 18:33
</time>
</span>
<span class="post-category" >
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-folder-o"></i>
</span>
<span class="post-meta-item-text">分类于</span>
<span itemprop="about" itemscope itemtype="http://schema.org/Thing">
<a href="/categories/前端之路/" itemprop="url" rel="index">
<span itemprop="name">前端之路</span>
</a>
</span>
</span>
<div class="post-wordcount">
<span class="post-meta-item-icon">
<i class="fa fa-file-word-o"></i>
</span>
<span class="post-meta-item-text">字数统计:</span>
<span title="字数统计">
2,628
</span>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-clock-o"></i>
</span>
<span class="post-meta-item-text">阅读时长 ≈</span>
<span title="阅读时长">
12 分钟
</span>
</div>
</div>
</header>
<div class="post-body mask-content " itemprop="articleBody" data-license="nd">
<h2 id="什么是跨域？"><a href="#什么是跨域？" class="headerlink" title="什么是跨域？"></a>什么是跨域？</h2><h3 id="浏览器的同源策略"><a href="#浏览器的同源策略" class="headerlink" title="浏览器的同源策略"></a>浏览器的同源策略</h3><p>在解释跨域的概念之前，先让我们来了解下浏览器的同源策略，这也是为什么会有跨域的由来。</p>
<p>同源策略是一项约定，是浏览器的行为，限制了从同一个源下的文档或脚本如何与来自另一个源的资源进行交互。这是一个用于隔离潜在恶意文件的重要安全机制。</p>
<p>所谓<strong>同源</strong>是指 <strong><code>协议</code></strong>+<strong><code>域名</code></strong>+<strong><code>端口</code></strong> 三者都相同，不满足这个条件即为<strong>非同源</strong>，即使两个不同域名指向同一 IP 地址。 <strong>当协议、子域名、主域名、端口号中任意一个不相同时，都算作不同域。</strong> 不同域之间相互请求资源，就算作<code>跨域</code>。</p>
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<a class="post-title-link" href="/posts/1659/" itemprop="url">Redux核心概念词汇表</a></h2>
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<p>这是 Redux 的核心概念词汇表以及这些核心概念的类型签名。</p>
<h2 id="State"><a href="#State" class="headerlink" title="State"></a>State</h2><figure class="highlight typescript"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">type</span> State = <span class="built_in">any</span>;</span><br></pre></td></tr></table></figure>
<p>State (也称为 state tree) 是一个宽泛的概念，但是在 Redux API 中，通常是指一个唯一的 state 值，由 store 管理且由 <code>getState()</code> 方法获得。它表示了 Redux 应用的全部状态，通常为一个多层嵌套的对象。</p>
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