这是layout.js。我已注释掉导出 const 元数据，这样做可以使 Vercel 的部署成功。如果不注释掉元数据，部署将会失败。
"use client";
import "./globals.css";
import { store } from "./store/store";
import { Provider } from "react-redux";
/*export const metadata = {
title: "Create Next App",
description: "Generated by create next app",
};*/
export default function RootLayout({ children }) {
return (
<html lang="en">
<Provider store={store}>
<body
style={{
minHeight: "100vh",
maxHeight: "fit-content",
boxSizing: "border-box",
backgroundColor: "#f2f5fd",
}}
>
{children}
</body>
</Provider>
</html>
);
}当我取消注释元数据时，构建部署失败并出现以下错误。
Failed to compile.
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./app/layout.js
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ReactServerComponentsError:
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You are attempting to export "metadata" from a component marked with "use client", which is disallowed. Either remove the export, or the "use client" directive. Read more: https://nextjs.org/docs/getting-started/react-essentials#the-use-client-directive
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,-[/vercel/path0/app/layout.js:3:1]
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3 | import { store } from "./store/store";
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4 | import { Provider } from "react-redux";
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5 |
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6 | export const metadata = {
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: ^^^^^^^^
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7 | title: "Create Next App",
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8 | description: "Generated by create next app",
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9 | };
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`----
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File path:
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./app/layout.js
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> Build failed because of webpack errors
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Error: Command "npm run build" exited with 1
14:35:07.372
BUILD_UTILS_SPAWN_1: Command "npm run build" exited with 1为什么元数据会导致错误以及解决方案是什么？
在 Next.js 中，直接从组件导出数据以执行服务器端渲染（SSR）时使用“使用客户端”指令。当您使用“使用客户端”时，该组件仅用于在客户端执行代码。这意味着您不应从标记为“使用客户端”的组件导出任何变量或数据，因为这会导致服务器端渲染出现问题。
错误消息通知您此违规行为，并建议两种可能的解决方案：
通过遵循这些解决方案之一，您可以确保组件遵守 Next.js 的服务器端渲染和导出数据指南，从而解决 ReactServerComponentsError。