构建你的应用

构建 SvelteKit 应用分为两个阶段，这两个阶段都在你运行 vite build（通常通过 npm run build）时发生。

¥Building a SvelteKit app happens in two stages, which both happen when you run vite build (usually via npm run build).

首先，Vite 会为你的服务器代码、浏览器代码和服务工作线程（如果有）创建一个优化的生产版本。如果合适，预渲染 在此阶段执行。

¥Firstly, Vite creates an optimized production build of your server code, your browser code, and your service worker (if you have one). Prerendering is executed at this stage, if appropriate.

其次，适配器会采用此生产版本并针对你的目标环境进行调整 - 有关更多信息，请参阅以下页面。

¥Secondly, an adapter takes this production build and tunes it for your target environment — more on this on the following pages.

构建期间(During the build)

¥During the build

SvelteKit 将在构建期间加载你的 +page/layout(.server).js 文件（以及它们导入的所有文件）以供分析。与 Svelte 集成的工具所需的任何其他选项。

¥SvelteKit will load your +page/layout(.server).js files (and all files they import) for analysis during the build. Any code that should not be executed at this stage must check that building from $app/environment is false:

import { const building: boolean
SvelteKit analyses your app during the build step by running it. During this process, building is true. This also applies during prerendering.
building } from '$app/environment';
import { import setupMyDatabasesetupMyDatabase } from '$lib/server/database';

if (!const building: boolean
SvelteKit analyses your app during the build step by running it. During this process, building is true. This also applies during prerendering.
building) {
	import setupMyDatabasesetupMyDatabase();
}

export function function load(): voidload() {
	// ...
}

预览你的应用(Preview your app)

¥Preview your app

构建后，你可以使用 vite preview（通过 npm run preview）在本地查看生产构建。请注意，这将在 Node 中运行应用，因此不是你部署的应用的完美复制品 - 适配器特定的调整（如 platform 对象）不适用于预览。

¥After building, you can view your production build locally with vite preview (via npm run preview). Note that this will run the app in Node, and so is not a perfect reproduction of your deployed app — adapter-specific adjustments like the platform object do not apply to previews.