[英]Not able to import Express with Babel and Webpack
I'm using webpack and babel to create an app using ES6 syntax. 我正在使用webpack和babel使用ES6语法创建一个应用程序。 The problem is that I'm not able to import
express
. 问题是我无法导入
express
。
(Note: I'm able to import (and require) node module "path", didn't check any more) (注意:我能够导入(并要求)节点模块“路径”,不再检查了)
Here's my app: 这是我的应用程序:
import express from 'express';
Even the below results in same error: 即使是以下情况也会导致相同的错误:
var app = require('express');
Here's my webpack.config.js
这是我的
webpack.config.js
module.exports = {
entry: './src/app.js',
output: {
path: 'builds',
filename: 'bundle.js'
},
module: {
loaders: [
{
test: /\.js/,
loader: 'babel',
include: __dirname + '/src',
exclude: /node_modules/,
query: {
presets: ['es2015']
}
}
],
}
};
I've tried the following as well: 我也尝试了以下方法:
exclude: [/node_modules/],
exclude: __dirname + '/node_modules',
But I still keep getting a very big stack trace which starts with: 但是我仍然不断获得大量的堆栈跟踪信息,其开始于:
WARNING in ./~/express/lib/view.js
Critical dependencies:
78:29-56 the request of a dependency is an expression
@ ./~/express/lib/view.js 78:29-56
ERROR in ./~/express/lib/request.js
Module not found: Error: Cannot resolve module 'net' in /home/projects/node_modules/express/lib
@ ./~/express/lib/request.js 18:11-25
ERROR in ./~/express/lib/view.js
Module not found: Error: Cannot resolve module 'fs' in /home/projects/node_modules/express/lib
@ ./~/express/lib/view.js 18:9-22
And ends with 并以
@ ./~/mime/mime.js 87:12-35
ERROR in ./~/mime-db/db.json
Module parse failed: /home/projects/node_modules/mime-db/db.json Line 2: Unexpected token :
You may need an appropriate loader to handle this file type.
| {
| "application/1d-interleaved-parityfec": {
| "source": "iana"
| },
@ ./~/mime-db/index.js 11:17-37
I guess this is because node_modules
folder is not being ignored? 我猜这是因为
node_modules
文件夹没有被忽略吗?
Also this is my package.json
if maybe module versions are a problem: 如果模块版本有问题,这也是我的
package.json
:
{
"name": "testing",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "MIT",
"dependencies": {
"express": "^4.13.4"
},
"devDependencies": {
"babel-core": "^6.6.0",
"babel-loader": "^6.2.4",
"babel-preset-es2015": "^6.6.0",
"webpack": "^1.12.14"
}
}
This can be fixed by using json-loader: 这可以通过使用json-loader来解决:
npm install json-loader --save-dev
And in webpack.config add this loader: 然后在webpack.config中添加以下加载器:
{ test: /\.json$/, loader: "json-loader" }
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