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React-Props.html
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<!DOCTYPE html>
<html>
<!-- Head -->
<head>
<title>React Props - 我叫史迪奇</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="keywords" content="这是我的博客" />
<meta name="description" content="这是我的窝">
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<link rel="stylesheet" type="text/css" href="/css/bootstrap-3.3.4.css">
<link rel="stylesheet" href="/css/style.css">
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<script src="/js/jquery.slimscroll.min.js"></script>
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<link href='https://unpkg.com/@waline/[email protected]/dist/waline.css' rel='stylesheet' />
<script src="/resources/loadingBar/pace.min.js"></script>
<script src="/js/headBand.min.js"></script>
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<script src="/js/highlight.min.js"></script>
<link rel="stylesheet" href="/css/code-style.css">
<link rel="stylesheet" href="/css/code-styles/sdqlightfair.min.css">
<script src="/js/mermaid.min.js"></script>
<script src="/js/katex.min.js"></script>
<link rel="stylesheet" href="/css/katex.min.css">
<link rel="stylesheet" href="/css/avatar_user.css">
<meta name="generator" content="Hexo 5.3.0"></head>
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<a>
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class=""></i>
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<a href="/">
<span style="font-size: 20px;">我叫史迪奇</span>
</a>
</div>
<div class="nav-list">
<a href="/" title="首页">
<span>
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<span>
留言
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</a>
<a href="/link.html" title="友链">
<span>
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</span>
</a>
</div>
<div class="mobile">
<div class="mobile-inner">
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<div class="mobile-inner-header-icon mobile-inner-header-icon-out">
<span></span><span></span>
</div>
</div>
<div class="mobile-inner-nav">
<a href="/" title="首页">
<span>
首页
</span>
</a>
<a href="/about.html" title="关于">
<span>
关于
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</a>
<a href="/valine.html" title="留言">
<span>
留言
</span>
</a>
<a href="/link.html" title="友链">
<span>
友链
</span>
</a>
</div>
</div>
</div>
<script>
$(window).load(function () {
$(".mobile-inner-header-icon").click(function(){
$(this).toggleClass("mobile-inner-header-icon-click mobile-inner-header-icon-out");
$(".mobile-inner-nav").slideToggle(250);
});
$(".mobile-inner-nav a").each(function( index ) {
$( this ).css({'animation-delay': (index/10)+'s'});
});
});
</script>
<div class="container-fluid">
<div class="navbar-btn" style="padding: 0; padding-top: 10px;">
<button type="button" class="btn-toggle-fullwidth btn-toggle-mx">
<i class="sdqMsDanIconFont"></i>
</button>
</div>
</div>
</nav>
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<div class="sidebar-author">
<a href="/">
<img src="https://s1.ax1x.com/2023/08/10/pPm8IIK.jpg">
<img src="">
</a>
</div>
<nav>
<div class="sdq-count">
<span>文章</span>156
<span>标签</span>0
<span>分类</span>27
</div>
<div class="social-btns">
<a target="_blank" class="btn GitHub" href="https://github.com/sdqOS/">
<i class="sdqMsDanIconFont sdq3 sdqgithub"></i>
</a>
<a target="_blank" class="btn qq" href="https://wpa.qq.com/msgrd?v=3&uin=3083329400&site=qq&menu=yes">
<i class="sdqMsDanIconFont sdq3 sdqqq1"></i>
</a>
</div>
<div class="social-search">
<input id="local-search-input" />
<!-- <button class="sdq3 sdqfeiji"></button> -->
</div>
<style>
.search-result{
display: none;
}
.search-result-list li {
list-style: none;
line-height: 32px;
margin-bottom: 15px;
}
</style>
<div id="local-search-result"></div>
<script>
var search_path = "search.xml";
if (search_path.length == 0) {
search_path = "/search.xml";
}
var path = "/" + search_path;
searchFunc(path, 'local-search-input', 'local-search-result');
</script>
<ul class="nav">
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<span>20</span>
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<span>3</span>
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<span>1</span>
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</div>
<style>
/* CSS */
.canvas {
position:fixed;
width: 1920px;
height: 862px;
left: -360px;
top: 0;
z-index: -1;
}
</style>
<div class="sdq-bg">
<div class="div_bg"></div>
</div>
<!-- Scripts -->
<script>
// 在这里写你的代码...
(function() {
"use strict";
var $body = document.querySelector('body');
/*$('body').addClass('is-preload'); 添加灰面遮罩，可能存在问题
//$('.sdq-bg').css('background','none'); */
// Methods/polyfills.
// classList | (c) @remy | github.com/remy/polyfills | rem.mit-license.org
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window.canUse=function(p){if(!window._canUse)window._canUse=document.createElement("div");var e=window._canUse.style,up=p.charAt(0).toUpperCase()+p.slice(1);return p in e||"Moz"+up in e||"Webkit"+up in e||"O"+up in e||"ms"+up in e};
// window.addEventListener
(function(){if("addEventListener"in window)return;window.addEventListener=function(type,f){window.attachEvent("on"+type,f)}})();
// 在页面加载时播放初始动画。
window.addEventListener('load', function() {
window.setTimeout(function() {
$body.classList.remove('is-preload');
}, 100);
});
// Slideshow Background.
if (window.addEventListener) { window.addEventListener("load",sdqimgbg, false);}
else if (window.attachEvent) {window.attachEvent("onload",sdqimgbg); }
else{ window.onload =sdqimgbg; }
function sdqimgbg(){
(function() {
// Settings.
var settings = {
// Images (in the format of 'url': 'alignment').
images: {
'': 'center',
'': 'center',
'': 'center',
'': 'center'
},
// Delay.
delay: 6000
};
// Vars.
var pos = 0, lastPos = 0,
$wrapper, $bgs = [], $bg,
k, v;
var $sidebar = document.querySelector('#sidebar-nav');
var $main = document.querySelector('.main');
// Create BG wrapper, BGs.
$wrapper = document.createElement('div');
$wrapper.id = 'bg';
$sidebar.appendChild($wrapper);
//$main.appendChild($wrapper);
for (k in settings.images) {
// Create BG.
$bg = document.createElement('div');
$bg.style.backgroundImage = 'url("' + k + '")';
$bg.style.backgroundPosition = settings.images[k];
$wrapper.appendChild($bg);
// Add it to array.
$bgs.push($bg);
}
// Main loop.
$bgs[pos].classList.add('visible');
$bgs[pos].classList.add('top');
// Bail if we only have a single BG or the client doesn't support transitions.
if ($bgs.length == 1
|| !canUse('transition'))
return;
window.setInterval(function() {
lastPos = pos;
pos++;
// Wrap to beginning if necessary.
if (pos >= $bgs.length)
pos = 0;
// Swap top images.
$bgs[lastPos].classList.remove('top');
$bgs[pos].classList.add('visible');
$bgs[pos].classList.add('top');
}, settings.delay);
})(); // end
}
})();
</script>
<style>
body {
background-color: #000;
}
body.is-preload *, body.is-preload *:before, body.is-preload *:after {
-moz-animation: none !important;
-webkit-animation: none !important;
-ms-animation: none !important;
animation: none !important;
-moz-transition: none !important;
-webkit-transition: none !important;
-ms-transition: none !important;
transition: none !important;
}
/* BG */
#bg {
-moz-transition: opacity 2s ease-in-out;
-webkit-transition: opacity 2s ease-in-out;
-ms-transition: opacity 2s ease-in-out;
transition: opacity 2s ease-in-out;
height: 100%;
left: 0;
opacity: 0.2;
position: fixed;
top: 0;
width: 100%;
z-index: -1;
}
#bg div {
-moz-transition: opacity 3s ease, visibility 3s;
-webkit-transition: opacity 3s ease, visibility 3s;
-ms-transition: opacity 3s ease, visibility 3s;
transition: opacity 3s ease, visibility 3s;
background-size: cover;
height: 100%;
left: 0;
opacity: 0;
position: absolute;
top: 0;
visibility: hidden;
width: 150%;
}
#bg div.visible {
-moz-animation: bg 45s linear infinite;
-webkit-animation: bg 45s linear infinite;
-ms-animation: bg 45s linear infinite;
animation: bg 45s linear infinite;
opacity: 1;
visibility: visible;
z-index: 1;
}
#bg div.visible.top {
z-index: 2;
}
@media screen and (max-width: 1280px) {
#bg div.visible {
-moz-animation: bg 29.25s linear infinite;
-webkit-animation: bg 29.25s linear infinite;
-ms-animation: bg 29.25s linear infinite;
animation: bg 29.25s linear infinite;
}
}
@media screen and (max-width: 736px) {
#bg div.visible {
-moz-animation: bg 18s linear infinite;
-webkit-animation: bg 18s linear infinite;
-ms-animation: bg 18s linear infinite;
animation: bg 18s linear infinite;
}
}
#bg div:only-child {
-moz-animation-direction: alternate !important;
-webkit-animation-direction: alternate !important;
-ms-animation-direction: alternate !important;
animation-direction: alternate !important;
}
body.is-preload #bg {
opacity: 0;
}
@-moz-keyframes bg {
0% {
-moz-transform: translateX(0);
-webkit-transform: translateX(0);
-ms-transform: translateX(0);
transform: translateX(0);
}
100% {
-moz-transform: translateX(-25%);
-webkit-transform: translateX(-25%);
-ms-transform: translateX(-25%);
transform: translateX(-25%);
}
}
@-webkit-keyframes bg {
0% {
-moz-transform: translateX(0);
-webkit-transform: translateX(0);
-ms-transform: translateX(0);
transform: translateX(0);
}
100% {
-moz-transform: translateX(-25%);
-webkit-transform: translateX(-25%);
-ms-transform: translateX(-25%);
transform: translateX(-25%);
}
}
@-ms-keyframes bg {
0% {
-moz-transform: translateX(0);
-webkit-transform: translateX(0);
-ms-transform: translateX(0);
transform: translateX(0);
}
100% {
-moz-transform: translateX(-25%);
-webkit-transform: translateX(-25%);
-ms-transform: translateX(-25%);
transform: translateX(-25%);
}
}
@keyframes bg {
0% {
-moz-transform: translateX(0);
-webkit-transform: translateX(0);
-ms-transform: translateX(0);
transform: translateX(0);
}
100% {
-moz-transform: translateX(-25%);
-webkit-transform: translateX(-25%);
-ms-transform: translateX(-25%);
transform: translateX(-25%);
}
}
</style>
<div class="main">
<div class="main-content">
<style>
#sdqPost:hover{
background-color: rgba(255, 255, 255, 0.5)!important;
}
</style>
<div class="sdq">
<div class="sdq-post" id="sdqPost">
<div class="sdq-title">
<h1>React Props</h1>
</div>
<div id="post" class="sdq-post-Statistics">
<a>2021年09月13日</a>
<a class="post-count">99 字</a>
<a class=" -link" href="/categories/React/">React</a>
</div>
<div id="modal" style="display:none">
<aside id="article-toc" class="fixed-toc">
<div id="article-toc-inner">
<strong class="sidebar-title">目录</strong>
<ol class="toc"><li class="toc-item toc-level-3"><a class="toc-link" href="#state-%E5%92%8C-props-%E4%B8%BB%E8%A6%81%E7%9A%84%E5%8C%BA%E5%88%AB%E5%9C%A8%E4%BA%8E-props-%E6%98%AF%E4%B8%8D%E5%8F%AF%E5%8F%98%E7%9A%84-%E8%80%8C-state-%E5%8F%AF%E4%BB%A5%E6%A0%B9%E6%8D%AE%E4%B8%8E%E7%94%A8%E6%88%B7%E4%BA%A4%E4%BA%92%E6%9D%A5%E6%94%B9%E5%8F%98-%E8%BF%99%E5%B0%B1%E6%98%AF%E4%B8%BA%E4%BB%80%E4%B9%88%E6%9C%89%E4%BA%9B%E5%AE%B9%E5%99%A8%E7%BB%84%E4%BB%B6%E9%9C%80%E8%A6%81%E5%AE%9A%E4%B9%89-state-%E6%9D%A5%E6%9B%B4%E6%96%B0%E5%92%8C%E4%BF%AE%E6%94%B9%E6%95%B0%E6%8D%AE-%E8%80%8C%E5%AD%90%E7%BB%84%E4%BB%B6%E5%8F%AA%E8%83%BD%E9%80%9A%E8%BF%87-props-%E6%9D%A5%E4%BC%A0%E9%80%92%E6%95%B0%E6%8D%AE"><span class="toc-text">state 和 props 主要的区别在于 props 是不可变的, 而 state 可以根据与用户交互来改变 这就是为什么有些容器组件需要定义 state 来更新和修改数据, 而子组件只能通过 props 来传递数据</span></a></li></ol></li></ol></li><li class="toc-item toc-level-1"><a class="toc-link" href="#%E6%9C%80%E5%9F%BA%E6%9C%AC%E7%9A%84%E4%BD%BF%E7%94%A8-Props"><span class="toc-text">最基本的使用 Props</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#%E9%BB%98%E8%AE%A4-Props"><span class="toc-text">默认 Props</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#State-%E5%92%8C-Props"><span class="toc-text">State 和 Props</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#Props-%E9%AA%8C%E8%AF%81"><span class="toc-text">Props 验证</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#%E6%9B%B4%E5%A4%9A%E9%AA%8C%E8%AF%81%E5%99%A8"><span class="toc-text">更多验证器</span></a>
</div>
</aside>
</div>
<a href="#modal" class="second">
<div class="i">
<i style="font-size:20px" class="sdq3 sdqfasong">
<span style="font-size:0px">
</i>
</div>
</a>
<script>
$(".second .i").mouseover(function(){
$(".second .i span").css("font-size","18px");
});
$(".second .i").mouseleave(function(){
$(".second .i span").css("font-size","0px");
});
</script>
<div>
<article>
<p><strong>React笔记</strong></p>
<a id="more"></a>
<h3 id="state-和-props-主要的区别在于-props-是不可变的-而-state-可以根据与用户交互来改变-这就是为什么有些容器组件需要定义-state-来更新和修改数据-而子组件只能通过-props-来传递数据"><a href="#state-和-props-主要的区别在于-props-是不可变的-而-state-可以根据与用户交互来改变-这就是为什么有些容器组件需要定义-state-来更新和修改数据-而子组件只能通过-props-来传递数据" class="headerlink" title="state 和 props 主要的区别在于 props 是不可变的, 而 state 可以根据与用户交互来改变 这就是为什么有些容器组件需要定义 state 来更新和修改数据, 而子组件只能通过 props 来传递数据"></a>state 和 props 主要的区别在于 props 是不可变的, 而 state 可以根据与用户交互来改变 这就是为什么有些容器组件需要定义 state 来更新和修改数据, 而子组件只能通过 props 来传递数据</h3><h1 id="最基本的使用-Props"><a href="#最基本的使用-Props" class="headerlink" title="最基本的使用 Props"></a>最基本的使用 Props</h1><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><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></pre></td><td class="code"><pre><code class="hljs HTML"><span class="hljs-tag"><<span class="hljs-name">body</span>></span><br><span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">id</span>=<span class="hljs-string">"example"</span>></span><span class="hljs-tag"></<span class="hljs-name">div</span>></span><br><span class="hljs-tag"><<span class="hljs-name">script</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text/babel"</span>></span><br>function MyNameIsStitch(props) {<br> return <span class="hljs-tag"><<span class="hljs-name">h1</span>></span>我叫 {props.name}!<span class="hljs-tag"></<span class="hljs-name">h1</span>></span>;<br>}<br><br>const element = <span class="hljs-tag"><<span class="hljs-name">MyNameIsStitch</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"史迪奇"</span>/></span>;<br><br>ReactDOM.render(<br> element,<br> document.getElementById('example')<br>);<br><span class="hljs-tag"></<span class="hljs-name">script</span>></span><br><span class="hljs-tag"></<span class="hljs-name">body</span>></span><br></code></pre></td></tr></table></figure>
<h1 id="默认-Props"><a href="#默认-Props" class="headerlink" title="默认 Props"></a>默认 Props</h1><p><strong>解析: 通过组件类的 defaultProps 属性为 props 设置默认值</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><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></pre></td><td class="code"><pre><code class="hljs HTML"><span class="hljs-tag"><<span class="hljs-name">body</span>></span><br><span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">id</span>=<span class="hljs-string">"example"</span>></span><span class="hljs-tag"></<span class="hljs-name">div</span>></span><br><span class="hljs-tag"><<span class="hljs-name">script</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text/babel"</span>></span><br>class MyNameIsStitch extends React.Component {<br> render() {<br> return (<br> <span class="hljs-tag"><<span class="hljs-name">h1</span>></span>我叫{this.props.name}<span class="hljs-tag"></<span class="hljs-name">h1</span>></span><br> );<br> }<br>}<br><br>MyNameIsStitch.defaultProps = {<br> name: '史迪奇'<br>};<br><br>const element = <span class="hljs-tag"><<span class="hljs-name">MyNameIsStitch</span>/></span>;<br><br>ReactDOM.render(<br> element,<br> document.getElementById('example')<br>);<br><span class="hljs-tag"></<span class="hljs-name">script</span>></span><br><span class="hljs-tag"></<span class="hljs-name">body</span>></span><br></code></pre></td></tr></table></figure>
<h1 id="State-和-Props"><a href="#State-和-Props" class="headerlink" title="State 和 Props"></a>State 和 Props</h1><p><strong>解析: 父组件中设置 state 并通过在子组件上使用 props 将其传递到子组件上</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><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><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br></pre></td><td class="code"><pre><code class="hljs HTML"><span class="hljs-tag"><<span class="hljs-name">body</span>></span><br><span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">id</span>=<span class="hljs-string">"example"</span>></span><span class="hljs-tag"></<span class="hljs-name">div</span>></span><br><span class="hljs-tag"><<span class="hljs-name">script</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text/babel"</span>></span><br><br>class WebSite extends React.Component {<br> constructor() {<br> super();<br><br> this.state = {<br> name: "我叫史迪奇",<br> site: "https://sdq3.gitee.io"<br> }<br> }<br> render() {<br> return (<br> <span class="hljs-tag"><<span class="hljs-name">div</span>></span><br> <span class="hljs-tag"><<span class="hljs-name">Name</span> <span class="hljs-attr">name</span>=<span class="hljs-string">{this.state.name}</span> /></span><br> <span class="hljs-tag"><<span class="hljs-name">Site</span> <span class="hljs-attr">site</span>=<span class="hljs-string">{this.state.site}</span> /></span><br> <span class="hljs-tag"></<span class="hljs-name">div</span>></span><br> );<br> }<br>}<br><br><br><br>class Name extends React.Component {<br> render() {<br> return (<br> <span class="hljs-tag"><<span class="hljs-name">h1</span>></span>{this.props.name}<span class="hljs-tag"></<span class="hljs-name">h1</span>></span><br> );<br> }<br>}<br> <br>class Site extends React.Component {<br> render() {<br> return (<br> <span class="hljs-tag"><<span class="hljs-name">a</span> <span class="hljs-attr">href</span>=<span class="hljs-string">{this.props.site}</span>></span><br> {this.props.site}<br> <span class="hljs-tag"></<span class="hljs-name">a</span>></span><br> );<br> }<br>}<br> <br>ReactDOM.render(<br> <span class="hljs-tag"><<span class="hljs-name">WebSite</span> /></span>,<br> document.getElementById('example')<br>);<br><span class="hljs-tag"></<span class="hljs-name">script</span>></span><br><span class="hljs-tag"></<span class="hljs-name">body</span>></span><br></code></pre></td></tr></table></figure>
<h1 id="Props-验证"><a href="#Props-验证" class="headerlink" title="Props 验证"></a>Props 验证</h1><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><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></pre></td><td class="code"><pre><code class="hljs HTML"><span class="hljs-tag"><<span class="hljs-name">body</span>></span><br><span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">id</span>=<span class="hljs-string">"example"</span>></span><span class="hljs-tag"></<span class="hljs-name">div</span>></span><br><span class="hljs-tag"><<span class="hljs-name">script</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text/babel"</span>></span><br>var title = "史迪奇";<br><br>class MyNameIsStitch extends React.Component {<br> render() {<br> return (<br> <span class="hljs-tag"><<span class="hljs-name">h1</span>></span>我叫{this.props.title}<span class="hljs-tag"></<span class="hljs-name">h1</span>></span><br> );<br> }<br>}<br><br>MyNameIsStitch.propTypes = {<br> title: PropTypes.string<br>};<br>ReactDOM.render(<br> <span class="hljs-tag"><<span class="hljs-name">MyNameIsStitch</span> <span class="hljs-attr">title</span>=<span class="hljs-string">{title}</span> /></span>,<br> document.getElementById('example')<br>);<br><span class="hljs-tag"></<span class="hljs-name">script</span>></span><br><span class="hljs-tag"></<span class="hljs-name">body</span>></span><br></code></pre></td></tr></table></figure>
<h1 id="更多验证器"><a href="#更多验证器" class="headerlink" title="更多验证器"></a>更多验证器</h1><figure class="highlight javascript"><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><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br></pre></td><td class="code"><pre><code class="hljs JavaScript"><span class="hljs-title class_">MyComponent</span>.<span class="hljs-property">propTypes</span> = {<br> {<span class="hljs-comment">/* 可以声明 prop 为指定的 JS 基本数据类型, 默认情况, 这些数据是可选的 */</span>}<br> <span class="hljs-attr">optionalArray</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">array</span>,<br> <span class="hljs-attr">optionalBool</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">bool</span>,<br> <span class="hljs-attr">optionalFunc</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">func</span>,<br> <span class="hljs-attr">optionalNumber</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">number</span>,<br> <span class="hljs-attr">optionalObject</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">object</span>,<br> <span class="hljs-attr">optionalString</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">string</span>,<br> <br> 可以被渲染的对象 numbers, strings, elements 或 array<br> <span class="hljs-attr">optionalNode</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">node</span>,<br> <br> {<span class="hljs-comment">/* React 元素 */</span>} <br> <span class="hljs-attr">optionalElement</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">element</span>,<br> <br> {<span class="hljs-comment">/* 用 JS 的 instanceof 操作符声明 prop 为类的实例 */</span>} <br> <span class="hljs-attr">optionalMessage</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-title function_">instanceOf</span>(<span class="hljs-title class_">Message</span>),<br> <br> {<span class="hljs-comment">/* 用 enum 来限制 prop 只接受指定的值 */</span>} <br> <span class="hljs-attr">optionalEnum</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-title function_">oneOf</span>([<span class="hljs-string">'News'</span>, <span class="hljs-string">'Photos'</span>]),<br> <br> {<span class="hljs-comment">/* 可以是多个对象类型中的一个 */</span>} <br> <span class="hljs-attr">optionalUnion</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-title function_">oneOfType</span>([<br> <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">string</span>,<br> <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">number</span>,<br> <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-title function_">instanceOf</span>(<span class="hljs-title class_">Message</span>)<br> ]),<br> <br> {<span class="hljs-comment">/* 指定类型组成的数组 */</span>} <br> <span class="hljs-attr">optionalArrayOf</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-title function_">arrayOf</span>(<span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">number</span>),<br> <br> {<span class="hljs-comment">/* 指定类型的属性构成的对象 */</span>} <br> <span class="hljs-attr">optionalObjectOf</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-title function_">objectOf</span>(<span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">number</span>),<br> <br> {<span class="hljs-comment">/* 特定 shape 参数的对象 */</span>} <br> <span class="hljs-attr">optionalObjectWithShape</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-title function_">shape</span>({<br> <span class="hljs-attr">color</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">string</span>,<br> <span class="hljs-attr">fontSize</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">number</span><br> }),<br> <br> {<span class="hljs-comment">/* 任意类型加上 `isRequired` 来使 prop 不可空 */</span>} <br> <span class="hljs-attr">requiredFunc</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">func</span>.<span class="hljs-property">isRequired</span>,<br> <br> {<span class="hljs-comment">/* 不可空的任意类型 */</span>} <br> <span class="hljs-attr">requiredAny</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">PropTypes</span>.<span class="hljs-property">any</span>.<span class="hljs-property">isRequired</span>,<br> <br> {<span class="hljs-comment">/* 自定义验证器如果验证失败需要返回一个 Error 对象不要直接使用 `console.warn` 或抛异常, 因为这样 `oneOfType` 会失效 */</span>} <br> <span class="hljs-attr">customProp</span>: <span class="hljs-keyword">function</span>(<span class="hljs-params">props, propName, componentName</span>) {<br> <span class="hljs-keyword">if</span> (!<span class="hljs-regexp">/matchme/</span>.<span class="hljs-title function_">test</span>(props[propName])) {<br> <span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">Error</span>(<span class="hljs-string">'Validation failed!'</span>);<br> }<br> }<br> }<br>}<br></code></pre></td></tr></table></figure>
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<strong>本文作者：</strong>
史迪奇<br>
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