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<strong class="sidebar-title">Getting Started</strong><a href="intro-to-liquid.html" class="sidebar-link current">Intro to Liquid</a><a href="setup.html" class="sidebar-link">Setup</a><a href="options.html" class="sidebar-link">Options</a><a href="render-file.html" class="sidebar-link">Render Files</a><a href="partials-and-layouts.html" class="sidebar-link">Includes and Layouts</a><a href="use-in-expressjs.html" class="sidebar-link">Use in Express.js</a><strong class="sidebar-title">Advanced</strong><a href="caching.html" class="sidebar-link">Caching</a><a href="register-filters-tags.html" class="sidebar-link">Register Filters/Tags</a><a href="access-scope-in-filters.html" class="sidebar-link">Access Scope in Filters</a><a href="parse-parameters.html" class="sidebar-link">Parse Parameters</a><a href="render-tag-content.html" class="sidebar-link">Render Tag Content</a><a href="sync-and-async.html" class="sidebar-link">Sync and Async</a><a href="whitespace-control.html" class="sidebar-link">Whitespace Control</a><a href="plugins.html" class="sidebar-link">Plugins</a><a href="operators.html" class="sidebar-link">Operators</a><a href="truthy-and-falsy.html" class="sidebar-link">Truthy and Falsy</a><strong class="sidebar-title">Miscellaneous</strong><a href="migrate-to-9.html" class="sidebar-link">Migrate to LiquidJS 9</a><a href="changelog.html" class="sidebar-link">Changelog</a><a href="differences.html" class="sidebar-link">Differences with Shopify/liquid</a><a href="contribution-guidelines.html" class="sidebar-link">Contribution Guidelines</a>
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<h1 class="article-title" itemprop="name">The Liquid Template Language</h1>
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<a target="_blank" rel="noopener external nofollow noreferrer" href="https://github.com/harttle/liquidjs/edit/master/docs/source/tutorials/intro-to-liquid.md" class="article-edit-link" title="Improve this doc"><i class="icon-pencil"></i></a>
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<p>LiquidJS is a simple, expressive and safe <a target="_blank" rel="noopener external nofollow noreferrer" href="https://github.com/Shopify/liquid">Shopify</a> / Github Pages compatible template engine in pure JavaScript. The purpose of this repo is to provide a standard Liquid implementation for the JavaScript community. Liquid is originally implemented in Ruby and used by Github Pages, Jekyll and Shopify, see <a href="./differences.html">Differences with Shopify/liquid</a>.</p>
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<p>LiquidJS syntax is relatively simple. There’re 2 types of markups in LiquidJS:</p>
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<ul>
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<li><strong>Tags</strong>. A tag consists of a tag name and optional arguments wrapped between <code>{%</code> and <code>%}</code>.</li>
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<li><strong>Outputs</strong>. An output consists of a value and a list of filters, which is optional, wrapped between <code>{{` and `}}</code>.</li>
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</ul>
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<blockquote class="note info"><strong class="note-title">Live Demo</strong><p>Before going into the details, here’s a live demo to play around: <a href="https://liquidjs.com/playground.html">https://liquidjs.com/playground.html</a>.</p>
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</blockquote>
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<h2 id="Outputs" class="article-heading"><a href="#Outputs" class="headerlink" title="Outputs"></a>Outputs<a class="article-anchor" href="#Outputs" aria-hidden="true"></a></h2><p><strong>Outputs</strong> are used to output variables, which can be transformed by filters, into HTML. The following template will insert the value of <code>username</code> into the input’s value:</p>
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<pre class="line-numbers language-liquid" data-language="liquid"><code class="language-liquid"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>text<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>user<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token liquid language-liquid"><span class="token delimiter punctuation">{{</span>username<span class="token delimiter punctuation">}}</span></span><span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
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<p>Values in output can be transformed by <strong>filter</strong>s before output. To append a string after the variable:</p>
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<pre class="line-numbers language-liquid" data-language="liquid"><code class="language-liquid"><span class="token liquid language-liquid"><span class="token delimiter punctuation">{{</span> username <span class="token operator">|</span> <span class="token function filter">append</span><span class="token operator">:</span> <span class="token string">", welcome to LiquidJS!"</span> <span class="token delimiter punctuation">}}</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
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<p>Filters can be chained:</p>
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<pre class="line-numbers language-liquid" data-language="liquid"><code class="language-liquid"><span class="token liquid language-liquid"><span class="token delimiter punctuation">{{</span> username <span class="token operator">|</span> <span class="token function filter">append</span><span class="token operator">:</span> <span class="token string">", welcome to LiquidJS!"</span> <span class="token operator">|</span> <span class="token function filter">capitalize</span> <span class="token delimiter punctuation">}}</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
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<p>A complete list of filters supported by LiquidJS can be found <a href="../filters/overview.html">here</a>.</p>
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<h2 id="Tags" class="article-heading"><a href="#Tags" class="headerlink" title="Tags"></a>Tags<a class="article-anchor" href="#Tags" aria-hidden="true"></a></h2><p><strong>Tags</strong> are used to control the template rendering process, manipulating template variables, inter-op with other templates, etc. For example <code>assign</code> can be used to define a variable which can be later used in the template:</p>
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<pre class="line-numbers language-liquid" data-language="liquid"><code class="language-liquid"><span class="token liquid language-liquid"><span class="token delimiter punctuation">{%</span> <span class="token keyword">assign</span> foo <span class="token operator">=</span> <span class="token string">"FOO"</span> <span class="token delimiter punctuation">%}</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
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<p>Typically tags appear in pairs with a start tag and a corresponding end tag. For example:</p>
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<pre class="line-numbers language-liquid" data-language="liquid"><code class="language-liquid"><span class="token liquid language-liquid"><span class="token delimiter punctuation">{%</span> <span class="token keyword">if</span> foo <span class="token operator">==</span> <span class="token string">"FOO"</span> <span class="token delimiter punctuation">%}</span></span>
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Variable `foo` equals "FOO"
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<span class="token liquid language-liquid"><span class="token delimiter punctuation">{%</span> <span class="token keyword">else</span> <span class="token delimiter punctuation">%}</span></span>
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Variable `foo` not equals "FOO"
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<span class="token liquid language-liquid"><span class="token delimiter punctuation">{%</span> <span class="token keyword">endif</span> <span class="token delimiter punctuation">%}</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span></span></code></pre>
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<p>A complete list of tags supported by LiquidJS can be found <a href="../tags/overview.html">here</a>.</p>
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<time class="article-footer-updated" datetime="2022-02-26T18:10:48.056Z" itemprop="dateModified">Last updated: 2022-02-26</time>
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<ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#Outputs"><span class="toc-text">Outputs</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#Tags"><span class="toc-text">Tags</span></a></li></ol>
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