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---
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title: 全局变量
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description: 本文档介绍 Halo 为模板引擎提供的专有全局变量。
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---
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import SiteSettingVo from "./vo/_SiteSettingVo.md"
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import ThemeVo from "./vo/_ThemeVo.md"
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Halo 目前为模板引擎在全局提供了一些变量，本文档将列出已提供的变量以及介绍这些变量的使用方法。
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## site
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### 描述
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提供了部分可公开的系统相关的设置项，其中所有参数均来自于 Console 的系统设置。
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### 类型
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<SiteSettingVo />
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### 示例
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显示站点标题：
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```html
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<h1 th:text="${site.title}"></h1>
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```
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显示站点 Logo：
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```html
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<img th:src="${site.logo}" alt="Logo" />
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```
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## theme
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### 描述
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关于当前激活主题的信息。
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### 类型
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<ThemeVo />
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### 示例
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显示主题名称：
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```html
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<h1 th:text="${theme.spec.displayName}"></h1>
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```
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在静态资源加入版本号参数，以防止升级之后的缓存问题：
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```html
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<link rel="stylesheet" th:href="@{/assets/dist/style.css?v={version}(version=${theme.spec.version})}" />
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<script th:src="@{/assets/dist/main.iife.js?v={version}(version=${theme.spec.version})}"></script>
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```
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