# 背景服務
背景服务插件与[窗口插件](/plugin-api/zh-cn/get-started/plugin-types/window.md)开发方式类似，主要区别在于代码的执行时机。背景服务插件会在软件启动时自动启动，而窗口插件只会在用户点击时执行。要创建一个背景服务插件，只需要在 `manifest.json` 中的 `main` 字段添加 `"serviceMode": true`，如下所示：
```json
{
"main":
{
"serviceMode": true, // 主要差异
"url": "index.html",
"width": 640,
"height": 480
}
}
```
背景服务插件也能弹出窗口，你可以在这个窗口显示当前背景任务的进度、状态，以便用户可以清楚地了解插件的当前状态。
最终代码如下：
{% tabs %}
{% tab title="manifest.json" %}
```json
{
"id": "LBCZEHP8BBO94",
"version": "1.0.0",
"name": "Service Plugin",
"logo": "/logo.png",
"keywords": [],
"main":
{
"serviceMode": true,
"url": "index.html",
"width": 640,
"height": 480
}
}
```
{% endtab %}
{% tab title="index.html" %}
```html
Background services can be without UI, but you can still display the status of background services here.
```
{% endtab %}
{% tab title="plugin.js" %}
```javascript
console.log(`Plugins will be created automatically, no need for users to execute them.`);
eagle.onPluginCreate((plugin) => {
console.log('eagle.onPluginCreate');
console.log(plugin);
});
eagle.onPluginShow(() => {
console.log('eagle.onPluginShow');
});
eagle.onPluginHide(() => {
console.log('eagle.onPluginHide');
});
```
{% endtab %}
{% endtabs %}
{% hint style="info" %}
**完整示例代码：**
{% endhint %}
{% hint style="info" %}
注：你可以查看这篇文章，[了解 `manifest.json`的所有配置方式](/plugin-api/zh-cn/tutorial/manifest.md)。
{% endhint %}
{% hint style="warning" %}
**注意：** 如果插件执行过程必须依赖相对的资源库路径，你可能需要透过[`onLibraryChanged(callback)`](/plugin-api/zh-cn/api/event.md#g3tny)，在资源库切换时，做出对应的调整，避免程序执行过程发生错误。
{% endhint %}
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