我正在使用Webpack进行服务器端react-node项目。自昨天以来,我一直无法弄清控制台上的错误。我希望有人花时间帮助我。这是最后一个错误:
ERROR in ./src lazy ^\.\/.*$ namespace object ./main
It's not allowed to load an initial chunk on demand. The chunk name "main" is already used by an entrypoint.
这里是服务器设置:
import express from "express";
const server = express();
import path from "path";
// const expressStaticGzip = require("express-static-gzip");
import expressStaticGzip from "express-static-gzip";
import webpack from "webpack";
import webpackHotServerMiddleware from "webpack-hot-server-middleware";
import configDevClient from "../../config/webpack.dev-client";
import configDevServer from "../../config/webpack.dev-server.js";
import configProdClient from "../../config/webpack.prod-client.js";
import configProdServer from "../../config/webpack.prod-server.js";
const isProd = process.env.NODE_ENV === "production";
const isDev = !isProd;
const PORT = process.env.PORT || 8000;
let isBuilt = false;
const done = () => {
!isBuilt &&
server.listen(PORT, () => {
isBuilt = true;
console.log(
`Server listening on http://localhost:${PORT} in ${process.env.NODE_ENV}`
);
});
};
if (isDev) {
const compiler = webpack([configDevClient, configDevServer]);
const clientCompiler = compiler.compilers[0];
const serverCompiler = compiler.compilers[1];
const webpackDevMiddleware = require("webpack-dev-middleware")(
compiler,
configDevClient.devServer
);
const webpackHotMiddlware = require("webpack-hot-middleware")(
clientCompiler,
configDevClient.devServer
);
server.use(webpackDevMiddleware);
server.use(webpackHotMiddlware);
server.use(webpackHotServerMiddleware(compiler));
console.log("Middleware enabled");
done();
} else {
webpack([configProdClient, configProdServer]).run((err, stats) => {
const clientStats = stats.toJson().children[0];
const render = require("../../build/prod-server-bundle.js").default;
server.use(
expressStaticGzip("dist", {
enableBrotli: true
})
);
server.use(render({ clientStats }));
done();
});
}
您应该通过将src/main.js
重命名为其他名称,例如src/index.js
,来解决上述问题。确保也更新webpack配置中的入口点:
main: [
...
"./src/index.js"
]
我没有仔细研究代码,也不知道是什么原因引起的,但是基于错误日志,似乎在生成的块中存在名称冲突。
修复入口点后还会弹出其他问题。例如,看起来您在针对Web环境使用某些带有二进制节点的软件包。一个示例是iltorb
,它是BrotliPlugin
的依赖项。
我克隆了您的代码并安装了其软件包,并根据屏幕截图错误,发现客户端出现fs
错误,您应该将以下键值添加到客户端Webpack配置文件中:
module.exports = {
name: "client",
mode: "development",
node: {
module: 'empty',
dgram: 'empty',
dns: 'mock',
fs: 'empty',
http2: 'empty',
net: 'empty',
tls: 'empty',
child_process: 'empty',
},
~~~
并且还基于问题中提到的错误,您复制了入口点,因此您应通过将其重命名为其他名称(例如index.js
或您想要的任何其他名称)来修复它,但请注意:您应更改条目点在webpack配置文件中:
// development
~~~
entry: {
vendor: ["react", "react-dom"],
main: [
// "react-hot-loader/patch",
// "babel-runtime/regenerator",
// "webpack-hot-middleware/client?reload=true",
"./src/index.js"
]
},
和
// production
name: "client",
entry: "./src/index.js",
经过这些更改,您得到了一个奇怪的警告:
[BABEL] Note: The code generator has deoptimised the styling of /Users/amerllica/VimProjects/webpack-server-side-rendering/build/prod-server-bundle.js as it exceeds the max of 500KB
并且您应该使用this answer来解决它:
// .babelrc
"env": {
"development": {
"plugins": ["react-hot-loader/babel"],
"compact": false // <==== adding this line
}
}
然后我收到TerserPlugin
错误,我忽略了它,但是在这里我震惊因为它存在于生产配置文件中,这是我使用dev
脚本命令时的情况。顺便说一句,我省略了。
毕竟,通过键入npm run dev
或yarn dev
命令,我收到了很多警告消息,并显示以下错误:
ERROR in ./node_modules/iltorb/build/bindings/iltorb.node 1:0
Module parse failed: Unexpected character '�' (1:0)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
(Source code omitted for this binary file)
而且我真的不知道这是什么错误,为什么JavaScript项目中存在iltorb.node
个二进制文件。
HINT:如果我在您的位置,我绝对会放弃此嘈杂的配置,并遵循clean SSR config。此SSR配置看起来像您的配置,但使用的方式正确。您的代码得救是没有希望的。