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doc: update typescript.md (#439)

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修正类型技巧内Capitalize的推导结果 106d7aa602
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jaywcjlove
2023-09-23 09:28:16 +00:00
parent 437051b158
commit f0c484d849
3 changed files with 5 additions and 3 deletions
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<pre class="language-ts"><code class="language-ts code-highlight"><span class="code-line"><span class="token keyword">type</span> <span class="token class-name">Capitalize<span class="token operator">&#x3C;</span><span class="token constant">T</span> <span class="token keyword">extends</span> <span class="token builtin">string</span><span class="token operator">></span></span> <span class="token operator">=</span> <span class="token constant">T</span> <span class="token keyword">extends</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span><span class="token keyword">infer</span> <span class="token constant">U</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span><span class="token keyword">infer</span> <span class="token constant">V</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token template-punctuation string">`</span></span>
</span><span class="code-line"> <span class="token operator">?</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>Uppercase<span class="token operator">&#x3C;</span><span class="token constant">U</span><span class="token operator">></span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span><span class="token constant">V</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token template-punctuation string">`</span></span>
</span><span class="code-line"> <span class="token operator">:</span> <span class="token constant">T</span>
</span><span class="code-line"><span class="token keyword">type</span> <span class="token class-name">capitalized</span> <span class="token operator">=</span> Capitalize<span class="token operator">&#x3C;</span><span class="token string">"hello world"</span><span class="token operator">></span> <span class="token comment">// Hello World</span>
</span><span class="code-line"><span class="token keyword">type</span> <span class="token class-name">capitalized</span> <span class="token operator">=</span> Capitalize<span class="token operator">&#x3C;</span><span class="token string">"hello world"</span><span class="token operator">></span> <span class="token comment">// Hello world</span>
</span></code></pre>
<p>也可以在 infer 中使用条件约束（<code>extends</code>）</p>
<pre class="language-ts"><code class="language-ts code-highlight"><span class="code-line"><span class="token keyword">type</span> <span class="token class-name">SomeBigInt</span> <span class="token operator">=</span> <span class="token string">"100"</span> <span class="token keyword">extends</span> <span class="token template-string"><span class="token template-punctuation string">`</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span><span class="token keyword">infer</span> <span class="token constant">U</span> <span class="token keyword">extends</span> <span class="token class-name">bigint</span><span class="token interpolation-punctuation punctuation">}</span></span><span class="token template-punctuation string">`</span></span> <span class="token operator">?</span> <span class="token constant">U</span> <span class="token operator">:</span> <span class="token builtin">never</span><span class="token punctuation">;</span>

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<p>如果你有资源，可以很方便<a href="https://github.com/jaywcjlove/reference/issues/102#issue-1451649637">部署 web 版</a>，这非常简单，只需要克隆 <a href="https://github.com/jaywcjlove/reference/tree/gh-pages">gh-pages</a> 分支代码到你的静态服务就可以了，还可以使用 <a href="https://hub.docker.com/r/wcjiang/reference">docker</a> 快捷部署 web 版。</p>
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