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design-principles.html
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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><title>Studio</title><meta name="viewport" content="minimum-scale=1, initial-scale=1, width=device-width"/><meta name="description" content="Documentation for IoT Studio"/><link rel="icon" type="image/x-icon" href="/favicon.png"/><meta name="next-head-count" content="5"/><link rel="preload" href="/_next/static/lJ8f1OPXj1LIX3jXxNe5T/pages/design-principles.js" as="script"/><link rel="preload" href="/_next/static/lJ8f1OPXj1LIX3jXxNe5T/pages/_app.js" as="script"/><link rel="preload" href="/_next/static/runtime/webpack-b65cab0b00afd201cbda.js" as="script"/><link rel="preload" href="/_next/static/chunks/framework.7ae2effc5b53140c6b41.js" as="script"/><link rel="preload" href="/_next/static/chunks/09744744.f2a5d7730b8c03aefecd.js" as="script"/><link rel="preload" href="/_next/static/chunks/b787c9e4.005a483b956bfc537fda.js" as="script"/><link rel="preload" href="/_next/static/chunks/3ffd58240c78583792684c15c0ccd050a259f18b.259d753eae00fece9338.js" as="script"/><link rel="preload" href="/_next/static/runtime/main-31dd8d033ab18ba4a707.js" as="script"/><style id="jss-server-side">.MuiSvgIcon-root {
fill: currentColor;
width: 1em;
height: 1em;
display: inline-block;
font-size: 1.5rem;
transition: fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;
flex-shrink: 0;
user-select: none;
}
.MuiSvgIcon-colorPrimary {
color: #296DDA;
}
.MuiSvgIcon-colorSecondary {
color: #2BA68C;
}
.MuiSvgIcon-colorAction {
color: rgba(0, 0, 0, 0.54);
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color: #F55753;
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.MuiSvgIcon-fontSizeInherit {
font-size: inherit;
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.MuiSvgIcon-fontSizeSmall {
font-size: 1rem;
}
.MuiSvgIcon-fontSizeLarge {
font-size: 2rem;
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.MuiPaper-root {
color: #626262;
transition: box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;
background-color: #FFF;
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.MuiPaper-outlined {
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box-shadow: 0px 2px 1px -1px rgba(0,0,0,0.2),0px 1px 1px 0px rgba(0,0,0,0.14),0px 1px 3px 0px rgba(0,0,0,0.12);
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}
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font-weight: 300;
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}
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font-family: "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 400;
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}
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font-family: "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 400;
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}
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font-size: 0.875rem;
font-family: "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 400;
line-height: 1.334;
}
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font-size: 0.75rem;
font-family: "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 500;
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}
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font-family: "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 400;
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}
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font-family: "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 500;
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}
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font-size: 0.75rem;
font-family: "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
font-weight: 400;
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text-transform: uppercase;
}
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white-space: nowrap;
text-overflow: ellipsis;
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margin-bottom: 0.35em;
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margin-bottom: 16px;
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color: #296DDA;
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color: #2BA68C;
}
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color: #626262;
}
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color: #939393;
}
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color: #F55753;
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}
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display: block;
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flex: 0 0 auto;
color: #939393;
padding: 12px;
overflow: visible;
font-size: 1.5rem;
text-align: center;
transition: background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;
border-radius: 50%;
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color: rgba(0, 0, 0, 0.26);
background-color: transparent;
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background-color: transparent;
}
}
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margin-right: -12px;
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margin-right: -3px;
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color: inherit;
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color: #296DDA;
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background-color: rgba(41, 109, 218, 0.04);
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background-color: transparent;
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}
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color: #2BA68C;
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background-color: rgba(43, 166, 140, 0.04);
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background-color: transparent;
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}
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padding: 3px;
font-size: 1.125rem;
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}</style></head><body><div id="__next"><div class="MuiBox-root jss9 jss1"><header class="MuiPaper-root MuiAppBar-root MuiAppBar-positionFixed MuiAppBar-colorTransparent jss10 jss2 mui-fixed MuiPaper-elevation4"><div class="MuiToolbar-root MuiToolbar-regular jss11 MuiToolbar-gutters"><button class="MuiButtonBase-root MuiIconButton-root jss14 MuiIconButton-colorInherit MuiIconButton-edgeStart" tabindex="0" type="button"><span class="MuiIconButton-label"><svg class="MuiSvgIcon-root" focusable="false" viewBox="0 0 24 24" aria-hidden="true"><path d="M3 18h18v-2H3v2zm0-5h18v-2H3v2zm0-7v2h18V6H3z"></path></svg></span></button><a class="MuiTypography-root MuiLink-root MuiLink-underlineHover jss12 MuiTypography-colorInherit" href="/"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="currentColor" d="M23.548 22.924h-6.28v-9.937c0-1.65-.434-3.016-1.29-4.06-.917-1.118-2.203-1.708-3.718-1.708-1.38 0-2.585.505-3.58 1.499-.997.994-1.502 2.198-1.502 3.577 0 1.42.467 2.62 1.389 3.562.919.942 2.136 1.44 3.52 1.44.258 0 .512-.017.762-.05v6.175a8.643 8.643 0 0 1-.589.022c-3.338 0-6.033-1.057-8.24-3.232C1.82 18.044.75 15.39.75 12.097c0-3.196 1.084-5.828 3.313-8.047 2.23-2.22 4.871-3.3 8.073-3.3 3.613 0 6.356 1 8.386 3.056 2.036 2.062 3.026 4.847 3.026 8.513v10.605z"></path></svg> <span>Studio</span></a><div class="MuiBox-root jss115"></div><a class="MuiTypography-root MuiLink-root MuiLink-underlineHover jss13 MuiTypography-colorInherit" href="###UNAVAILABLE"><svg width="24" height="24" viewBox="0 0 36 36"><path fill="currentColor" d="M2 14l9.38 9v-9l-4-12.28c-.205-.632-1.176-.632-1.38 0zM34 14l-9.38 9v-9l4-12.28c.205-.632 1.176-.632 1.38 0z"></path><path fill="currentColor" d="M18 34.38L3 14h30z"></path><path fill="currentColor" d="M18 34.38L11.38 14H2l4 11zM18 34.38L24.62 14H34l-4 11z"></path><path fill="currentColor" d="M2 14L.1 20.16c-.18.565 0 1.2.5 1.56l17.42 12.66z"></path><path fill="currentColor" d="M34 14l1.9 6.16c.18.565 0 1.2-.5 1.56L18 34.38z"></path></svg></a></div></header><main class="jss5"><nav class="toc"><ol class="toc-level toc-level-1"><li class="toc-item toc-item-h2"><a class="toc-link toc-link-h2" href="#道">道</a><ol class="toc-level toc-level-2"><li class="toc-item toc-item-h3"><a class="toc-link toc-link-h3" href="#无为">无为</a></li><li class="toc-item toc-item-h3"><a class="toc-link toc-link-h3" href="#夫唯不争">夫唯不争</a></li></ol></li><li class="toc-item toc-item-h2"><a class="toc-link toc-link-h2" href="#法">法</a><ol class="toc-level toc-level-2"><li class="toc-item toc-item-h3"><a class="toc-link toc-link-h3" href="#单一职责原则">单一职责原则</a></li><li class="toc-item toc-item-h3"><a class="toc-link toc-link-h3" href="#最小知识原则">最小知识原则</a></li></ol></li><li class="toc-item toc-item-h2"><a class="toc-link toc-link-h2" href="#术">术</a></li></ol></nav><h1 class="jss116"><a class="jss117" id="design-principles"></a>Design principles</h1><blockquote class="jss118"><p class="jss119">💭 降落。</p></blockquote><p class="jss119">尝试从 React 组件（Component 与 Hook）的角度重新解读面向对象设计的三大特征与六大设计原则。</p><h2 class="jss120"><a class="jss117" id="道"></a>道</h2><blockquote class="jss118"><p class="jss119">封装、继承、多态</p></blockquote><h3 class="jss121"><a class="jss117" id="无为"></a>无为</h3><ul><li>简单，则无副作用</li><li>无副作用，则无不复用</li></ul><p class="jss119">则无不为</p><h3 class="jss121"><a class="jss117" id="夫唯不争"></a>夫唯不争</h3><ul><li>只做一件事</li><li>才能做好一件事</li></ul><p class="jss119">故天下莫能与之争</p><h2 class="jss120"><a class="jss117" id="法"></a>法</h2><h3 class="jss121"><a class="jss117" id="单一职责原则"></a>单一职责原则</h3><blockquote class="jss118"><p class="jss119">SRP: Single responsibility principle</p></blockquote><p class="jss119">一个组件应该只有一个发生变化的原因，所以它应该只对应一个实体。</p><p class="jss119">Bad:</p><div class="MuiBox-root jss123 jss122"><pre class="prism-code language-tsx" style="color:#393A34;background-color:#f6f8fa;padding:24px;border-radius:4px"><div class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">// MyApp.tsx</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">MyApp</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">user</span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useUser</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">app</span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useApp</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">appId</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">User</span><span class="token tag" style="color:#00009f"> </span><span class="token tag spread punctuation" style="color:#393A34">{</span><span class="token tag spread punctuation" style="color:#393A34">...</span><span class="token tag spread attr-value" style="color:#e3116c">user</span><span class="token tag spread punctuation" style="color:#393A34">}</span><span class="token tag" style="color:#00009f"> </span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">App</span><span class="token tag" style="color:#00009f"> </span><span class="token tag spread punctuation" style="color:#393A34">{</span><span class="token tag spread punctuation" style="color:#393A34">...</span><span class="token tag spread attr-value" style="color:#e3116c">app</span><span class="token tag spread punctuation" style="color:#393A34">}</span><span class="token tag" style="color:#00009f"> </span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"></</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span></div></pre></div><blockquote class="jss118"><p class="jss119"><code class="jss124">useUser</code> 与 <code class="jss124">useApp</code> 都是变化点，每一个变化都将引起两个模块的更新。</p></blockquote><p class="jss119">Good:</p><div class="MuiBox-root jss125 jss122"><pre class="prism-code language-tsx" style="color:#393A34;background-color:#f6f8fa;padding:24px;border-radius:4px"><div class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">// EnhancedUser.tsx</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">EnhancedUser</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">user</span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useUser</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">User</span><span class="token tag" style="color:#00009f"> </span><span class="token tag spread punctuation" style="color:#393A34">{</span><span class="token tag spread punctuation" style="color:#393A34">...</span><span class="token tag spread attr-value" style="color:#e3116c">user</span><span class="token tag spread punctuation" style="color:#393A34">}</span><span class="token tag" style="color:#00009f"> </span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">// EnhancedApp.tsx</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">EnhancedApp</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token parameter punctuation" style="color:#393A34">{</span><span class="token parameter"> appId </span><span class="token parameter punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">app</span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useApp</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">appId</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">App</span><span class="token tag" style="color:#00009f"> </span><span class="token tag spread punctuation" style="color:#393A34">{</span><span class="token tag spread punctuation" style="color:#393A34">...</span><span class="token tag spread attr-value" style="color:#e3116c">user</span><span class="token tag spread punctuation" style="color:#393A34">}</span><span class="token tag" style="color:#00009f"> </span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">// MyApp.tsx</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">MyApp</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token parameter">props</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">User</span><span class="token tag" style="color:#00009f"> </span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">App</span><span class="token tag" style="color:#00009f"> </span><span class="token tag spread punctuation" style="color:#393A34">{</span><span class="token tag spread punctuation" style="color:#393A34">...</span><span class="token tag spread attr-value" style="color:#e3116c">props</span><span class="token tag spread punctuation" style="color:#393A34">}</span><span class="token tag" style="color:#00009f"> </span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"></</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span></div></pre></div><blockquote class="jss118"><p class="jss119">将变化缩小到尽可能小的范围，避免发生状态污染。</p></blockquote><h3 class="jss121"><a class="jss117" id="最小知识原则"></a>最小知识原则</h3><blockquote class="jss118"><p class="jss119">LKP: Least knowledge principle</p></blockquote><p class="jss119">一个组件对于其它组件知道得越少越好，一个组件</p><p class="jss119">Bad:</p><div class="MuiBox-root jss126 jss122"><pre class="prism-code language-tsx" style="color:#393A34;background-color:#f6f8fa;padding:24px;border-radius:4px"><div class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">Grandpa</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token parameter punctuation" style="color:#393A34">{</span><span class="token parameter"> children </span><span class="token parameter punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">message</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> setMessage</span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useState</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">''</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">useEffect</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> apple</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> orange </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">await</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">getFruits</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">setMessage</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token template-string string" style="color:#e3116c">Grandpa got </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">apple</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> apples and </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">orange</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> oranges on his hands</span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain">message</span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain">message </span><span class="token operator" style="color:#393A34">?</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">cloneElement</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">children</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> apple</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> orange </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">:</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">null</span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"></</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">Father</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token parameter punctuation" style="color:#393A34">{</span><span class="token parameter"> children</span><span class="token parameter punctuation" style="color:#393A34">,</span><span class="token parameter"> apple</span><span class="token parameter punctuation" style="color:#393A34">,</span><span class="token parameter"> orange </span><span class="token parameter punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token template-string string" style="color:#e3116c">father ate </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">apple</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> apples, and pass </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">orange</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> oranges to his sone</span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token function" style="color:#d73a49">cloneElement</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">children</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> orange </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"></</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">Son</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token parameter punctuation" style="color:#393A34">{</span><span class="token parameter"> orange </span><span class="token parameter punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token template-string string" style="color:#e3116c">son ate </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">orange</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> oranges</span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">// MyFamily.tsx</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">MyFamily</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">Grandpa</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">Father</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">Son</span><span class="token tag" style="color:#00009f"> </span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"></</span><span class="token tag class-name" style="color:#00009f">Father</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"></</span><span class="token tag class-name" style="color:#00009f">Grandpa</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span></div></pre></div><blockquote class="jss118"><p class="jss119">父亲实际并不关注橙子，但是为了儿子能吃到橙子，不得不做了搬运工。</p></blockquote><p class="jss119">Good:</p><div class="MuiBox-root jss127 jss122"><pre class="prism-code language-tsx" style="color:#393A34;background-color:#f6f8fa;padding:24px;border-radius:4px"><div class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">Grandpa</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token parameter punctuation" style="color:#393A34">{</span><span class="token parameter"> children </span><span class="token parameter punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> putFruit </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useContext</span><span class="token punctuation" style="color:#393A34">(</span><span class="token maybe-class-name">FruitTable</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">message</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> setMessage</span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useState</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">''</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">useEffect</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> apple</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> orange </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">await</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">getFruits</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">putFruit</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> apple</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> orange </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">setMessage</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token template-string string" style="color:#e3116c">Grandpa put </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">apple</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> apples and </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">orange</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> oranges on the table</span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">putFruit</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> message</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">Father</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> apple</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> ateFruit </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useContext</span><span class="token punctuation" style="color:#393A34">(</span><span class="token maybe-class-name">FruitTable</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">useEffect</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">ateFruit</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> apple </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">apple</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> ateFruit</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token template-string string" style="color:#e3116c">father ate </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">apple</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> apples</span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">Son</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> orange</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> ateFruit </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">useContext</span><span class="token punctuation" style="color:#393A34">(</span><span class="token maybe-class-name">FruitTable</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">useEffect</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#d73a49">ateFruit</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> orange </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">orange</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> ateFruit</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token template-string string" style="color:#e3116c">son ate </span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">${</span><span class="token template-string interpolation">orange</span><span class="token template-string interpolation interpolation-punctuation punctuation" style="color:#393A34">}</span><span class="token template-string string" style="color:#e3116c"> oranges</span><span class="token template-string template-punctuation string" style="color:#e3116c">`</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">// MyFamily.tsx</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token function-variable function maybe-class-name" style="color:#d73a49">MyFamily</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token keyword" style="color:#00009f">return</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">FruitTable.Provider</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">Grandpa</span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">Father</span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"><</span><span class="token tag class-name" style="color:#00009f">Son</span><span class="token tag" style="color:#00009f"> </span><span class="token tag punctuation" style="color:#393A34">/></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34"></</span><span class="token tag class-name" style="color:#00009f">FruitTable.Provider</span><span class="token tag punctuation" style="color:#393A34">></span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span></div><div class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span></div></pre></div><blockquote class="jss118"><p class="jss119">如此一来，有一天爸爸不想吃苹果了，直接移除爸爸就好了。</p></blockquote><h2 class="jss120"><a class="jss117" id="术"></a>术</h2><blockquote class="jss118"><p class="jss119">23 或更多种设计模式</p></blockquote><p class="jss119">未完待续</p></main><aside class="jss128 jss3 jss7"><nav class="MuiList-root jss4 MuiList-padding"><li class="MuiListItem-root jss133 leaf MuiListItem-gutters"><a class="MuiTypography-root MuiLink-root MuiLink-underlineNone MuiTypography-colorInherit" href="/">Getting Started</a></li><li class="MuiListItem-root jss133 MuiListItem-gutters"><svg 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