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<h1 class="article-title" itemprop="name">真和假</h1>
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<a target="_blank" rel="noopener external nofollow noreferrer" href="https://github.com/harttle/liquidjs/edit/master/docs/source/zh-cn/tutorials/truthy-and-falsy.md" class="article-edit-link" title="改进这篇文档"><i class="icon-pencil"></i></a>
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<p>虽然我们希望 <a target="_blank" rel="noopener external nofollow noreferrer" href="https://www.npmjs.com/package/liquidjs">Liquid</a> 是平台无关的，但 JavaScript 版本和 <a target="_blank" rel="noopener external nofollow noreferrer" href="https://shopify.github.io/liquid">Ruby 版本</a> 仍然有<a target="_blank" rel="noopener external nofollow noreferrer" href="https://github.com/harttle/liquidjs#differences-and-limitations">很多区别</a>，真值就是其中之一。</p>
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<h2 id="真值表" class="article-heading"><a href="#真值表" class="headerlink" title="真值表"></a>真值表<a class="article-anchor" href="#真值表" aria-hidden="true"></a></h2><p>根据 <a target="_blank" rel="noopener external nofollow noreferrer" href="https://shopify.github.io/liquid/basics/truthy-and-falsy/">Shopify 的文档</a>，Ruby 版本除了 <code>false</code> 和 <code>nil</code> 之外的所有值都是真，但 JavaScript 有完全不同的类型系统，比如我们有 <code>undefined</code> 类型，以及不区分 <code>integer</code> 和 <code>float</code>，因此有些不同：</p>
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<table>
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<thead>
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<tr>
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<th>值</th>
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<th>真</th>
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<th>假</th>
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</tr>
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</thead>
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<tbody><tr>
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<td><code>true</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>false</code></td>
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<td></td>
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<td>✔️</td>
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</tr>
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<tr>
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<td><code>null</code></td>
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<td></td>
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<td>✔️</td>
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</tr>
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<tr>
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<td><code>undefined</code></td>
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<td></td>
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<td>✔️</td>
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</tr>
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<tr>
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<td><code>string</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>empty string</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>0</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>integer</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>float</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>array</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>empty array</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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</tbody></table>
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<h2 id="使用-JavaScript-真值" class="article-heading"><a href="#使用-JavaScript-真值" class="headerlink" title="使用 JavaScript 真值"></a>使用 JavaScript 真值<a class="article-anchor" href="#使用-JavaScript-真值" aria-hidden="true"></a></h2><p>liquidjs 默认使用 Shopify 的真值表，但可以通过设置 <strong>jsTruthy</strong> 选项为 <code>true</code> 来使用标准的 JavaScript 真值。</p>
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<table>
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<thead>
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<tr>
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<th>值</th>
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<th>真</th>
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<th>假</th>
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</tr>
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</thead>
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<tbody><tr>
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<td><code>true</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>false</code></td>
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<td></td>
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<td>✔️</td>
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</tr>
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<tr>
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<td><code>null</code></td>
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<td></td>
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<td>✔️</td>
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</tr>
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<tr>
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<td><code>undefined</code></td>
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<td></td>
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<td>✔️</td>
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</tr>
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<tr>
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<td><code>string</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>empty string</code></td>
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<td></td>
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<td>✔️</td>
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</tr>
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<tr>
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<td><code>0</code></td>
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<td></td>
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<td>✔️</td>
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</tr>
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<tr>
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<td><code>integer</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>float</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>array</code></td>
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<td>✔️</td>
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<td></td>
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</tr>
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<tr>
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<td><code>empty array</code></td>
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<td>✔️</td>
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<td></td>
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<time class="article-footer-updated" datetime="2026-05-03T04:03:41.397Z" itemprop="dateModified">上次更新：2026-05-03</time>
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<ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#%E7%9C%9F%E5%80%BC%E8%A1%A8"><span class="toc-text">真值表</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%BD%BF%E7%94%A8-JavaScript-%E7%9C%9F%E5%80%BC"><span class="toc-text">使用 JavaScript 真值</span></a></li></ol>
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