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<strong class="sidebar-title">开始使用</strong><a href="intro-to-liquid.html" class="sidebar-link">Liquid 简介</a><a href="setup.html" class="sidebar-link">安装</a><a href="options.html" class="sidebar-link">选项</a><a href="render-file.html" class="sidebar-link">文件渲染</a><a href="partials-and-layouts.html" class="sidebar-link">引用/继承</a><a href="use-in-expressjs.html" class="sidebar-link">Express.js 中使用</a><strong class="sidebar-title">高级主题</strong><a href="caching.html" class="sidebar-link">缓存</a><a href="register-filters-tags.html" class="sidebar-link">注册标签/过滤器</a><a href="access-scope-in-filters.html" class="sidebar-link">过滤器里访问上下文</a><a href="parse-parameters.html" class="sidebar-link">参数解析</a><a href="render-tag-content.html" class="sidebar-link">渲染标签内容</a><a href="sync-and-async.html" class="sidebar-link">同步和异步</a><a href="whitespace-control.html" class="sidebar-link">换行和缩进</a><a href="plugins.html" class="sidebar-link">插件</a><a href="operators.html" class="sidebar-link current">运算符</a><a href="truthy-and-falsy.html" class="sidebar-link">真和假</a><strong class="sidebar-title">其他</strong><a href="migrate-to-9.html" class="sidebar-link">迁移到 LiquidJS 9</a><a href="changelog.html" class="sidebar-link">更新日志</a><a href="differences.html" class="sidebar-link">与 Shopify/liquid 的不同</a><a href="contribution-guidelines.html" class="sidebar-link">贡献指南</a>
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<h1 class="article-title" itemprop="name">运算符</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/operators.md" class="article-edit-link" title="改进这篇文档"><i class="icon-pencil"></i></a>
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<p>LiquidJS 运算符非常简单也很特别，只支持两类运算符：</p>
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<ul>
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<li>比较运算符：<code>==</code>, <code>!=</code>, <code>></code>, <code><</code>, <code>>=</code>, <code><=</code></li>
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<li>逻辑运算符：<code>or</code>, <code>and</code>, <code>contains</code></li>
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</ul>
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<p>因此普通的数学运算是不支持的，比如 <code>{{a + b}}</code>。它的替代方案是过滤器 <code>{{ a | plus: b}}</code>。事实上 <code>+</code> 在 LiquidJS 中是一个合法的变量名。</p>
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<h2 id="优先级" class="article-heading"><a href="#优先级" class="headerlink" title="优先级"></a>优先级<a class="article-anchor" href="#优先级" aria-hidden="true"></a></h2><ol>
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<li>比较运算符。所有比较运算符具有同样的优先级，且高于逻辑运算符。</li>
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<li>逻辑运算符。所有逻辑运算符具有同样的有衔接。</li>
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</ol>
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<h2 id="结合性" class="article-heading"><a href="#结合性" class="headerlink" title="结合性"></a>结合性<a class="article-anchor" href="#结合性" aria-hidden="true"></a></h2><p>逻辑运算符是又结合的，所以连续的逻辑运算时计算顺序是从右向左，参考 <a target="_blank" rel="noopener external nofollow noreferrer" href="https://help.shopify.com/en/themes/liquid/basics/operators#order-of-operations">Shopify</a> 的文档。</p>
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<time class="article-footer-updated" datetime="2023-08-17T13:43:42.606Z" itemprop="dateModified">上次更新：2023-08-17</time>
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