Javascript 找不到模块“babel-core”中的错误。使用 react.js、webpack 和 express 服务器
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ERROR in Cannot find module 'babel-core'. using react.js, webpack, and express server
提问by Richard Bustos
Whenever I run webpackin the terminal I get:
每当我webpack在终端中运行时，我都会得到：
Hash: efea76b1048c3a97b963
Version: webpack 1.12.13
Time: 33ms
+ 1 hidden modules
ERROR in Cannot find module 'babel-core'
Here is my webpack.config.jsfile
这是我的webpack.config.js文件
module.exports = {
entry: './app-client.js',
output: {
filename: 'public/bundle.js'
},
module: {
loaders: [
{
exclude: /(node_modules|app-server.js)/,
loader: 'babel'
}
]
}
}
package.json
包.json
{
"name": "react",
"version": "1.0.0",
"description": "React polling app",
"main": "app-client.js",
"dependencies": {
"babel-loader": "^6.2.2",
"bootstrap": "^3.3.6",
"express": "^4.13.4",
"react": "^0.14.7"
},
"devDependencies": {},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC"
}
回答by Chetan
You should install babel-loader and babel-core as dev-dependency while npm install.
你应该在 npm install 时安装 babel-loader 和 babel-core 作为 dev-dependency。
npm install babel-core babel-loader --save-dev
回答by CounterFlame
For those wanting to use babel-loader 8+: it requires Babel 7.x,, which is to be installed as the '@babel/core' package instead of 'babel-core'. In other words, run:
对于那些想要使用 babel-loader 8+ 的人：它需要 Babel 7.x，它被安装为 '@babel/core' 包而不是 'babel-core'。换句话说，运行：
npm install --save-dev @babel/core
回答by theJian
I just meet this error, and solved by installing babel-core. But the interesting is I found babel-core does exist in babel-loader's peerDependencies.
我刚遇到这个错误，通过安装 babel-core 解决了。但有趣的是我发现 babel-core 确实存在于 babel-loader 的 peerDependencies 中。
https://github.com/babel/babel-loader/blob/master/package.json
https://github.com/babel/babel-loader/blob/master/package.json
Why peerDependecies not install automatically, after a few searching work I found thisin npm blog.
为什么 peerDependcies 没有自动安装，经过一些搜索工作，我在 npm 博客中找到了这个。
peerDependencies will not automatically install anymore.
peerDependencies 将不再自动安装。
回答by Bhanuprakash D
Adding to @Chetan's answer on this thread:
在此线程上添加@Chetan 的回答：
I ran into this issue today while following through Dr. Axel Rauschmayer's book here. Per book, babel-loadershould download babel-coreas well. However this is not the case when I tried it out. I think this relates to @theJian's answer.
我同时通过阿克塞尔Rauschmayer先生博士的书下面今天就遇到了这个问题在这里。每本书，也babel-loader应该下载babel-core。然而，当我尝试时，情况并非如此。我认为这与@theJian 的回答有关。
Since the original package.json already lists babel-loaderas dependency, running the following command resolved the error.
由于原始 package.json 已babel-loader列为依赖项，因此运行以下命令解决了错误。
npm install babel-core --save-dev
回答by patilnitin
npm install babel-register
This can solve your issue. Additionally, add babelrc .babelrc { "presets" : ["es2015", "react"] }
这可以解决您的问题。此外，添加 babelrc .babelrc { "presets" : ["es2015", "react"] }
