ReferenceError：刷新nextjs页面时未定义文档

Question

我正在尝试使用 React for Nextjs 9.4 创建一个简单的 UI 库，这就是我正在做的

// input.js in React UI Lib

import React from "react";
import styled from "./input.module.scss";

const Input = React.forwardRef((props, ref) => (
  <>
    {props.label && <label className={styled.label}>{props.label}</label>}
    <input className={styled.input} {...props} ref={ref} />
  </>
));

export default Input;

并为简单起见创建了导出所有模块的索引

// app.js the index file for the lib

import PrimaryButton from "./components/button/primaryButton";
import TextInput from "./components/input/input";
import PasswordInput from "./components/passwordInput/password";
import CheckBox from "./components/checkbox/checkbox";

export {
  PrimaryButton,
  TextInput,
  PasswordInput,
  CheckBox
};

这也是我为 SSR Next 构建的 webpack 配置

const path = require("path");
const autoprefixer = require("autoprefixer");
const nodeExternals = require("webpack-node-externals");

const CSSLoader = {
  loader: "css-loader",
  options: {
    modules: "global",
    importLoaders: 2,
    sourceMap: false,
  },
};

const CSSModlueLoader = {
  loader: "css-loader",
  options: {
    modules: true,
    importLoaders: 2,
    sourceMap: false,
  },
};

const PostCSSLoader = {
  loader: "postcss-loader",
  options: {
    ident: "postcss",
    sourceMap: false,
    plugins: () => [autoprefixer()],
  },
};

const SassLoader = {
  loader: "sass-loader",
  options: {
    // Prefer `dart-sass`
    implementation: require("sass"),
  },
};

module.exports = {
  target: "node",
  entry: "./src/app.js",
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "bundle.js",
    chunkFilename: "[id].js",
    publicPath: "",
    library: "",
    libraryTarget: "commonjs",
  },
  externals: [nodeExternals()],
  resolve: {
    extensions: [".js", ".jsx"],
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        loader: "babel-loader",
        exclude: /node_modules/,
      },
      {
        test: /\.(sa|sc|c)ss$/i,
        exclude: [/node_modules/, /\.module\.(sa|sc|c)ss$/i],
        use: ["style-loader", CSSLoader, PostCSSLoader, SassLoader],
      },
      {
        test: /\.module\.(sa|sc|c)ss$/i,
        exclude: /node_modules/,
        use: ["style-loader", CSSModlueLoader, PostCSSLoader, SassLoader],
      },
      {
        test: /\.(png|jpe?g|gif)$/,
        loader: "url-loader?limit=10000&name=img/[name].[ext]",
      },
    ],
  },
};

1-i 构建

2-在 npm 上发布

3-在 Nextjs 中导入

然后一切正常，但问题是当我在开发过程中尝试刷新（F5）页面时出现错误

Unhandled Runtime Error
ReferenceError: document is not defined

我该如何解决这个问题？

Answer 1

1. 尝试仅在客户端渲染组件，您可以这样做：

   typeof window !== 'undefined' ? <Component /> : null

2. style-loader您在 webpack 配置中使用，它将使用SSR 中不可用的样式将样式注入到 head 中，您可以选择其他选项，例如mini-css-extract-plugindocument.createElement