typescript 如何修复“@types/node/index.d.ts 不是模块”？
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How to fix "@types/node/index.d.ts is not a module"?
提问by Suhas
I have installed node type definitions using the following command
我已经使用以下命令安装了节点类型定义
npm install --save-dev @types/node
After that, when I try to import the node type definitions using the following statement
之后，当我尝试使用以下语句导入节点类型定义时
import { Process } from '@types/node';
or
或者
import { Process } from 'node';
I get the following error
我收到以下错误
[ts] File '<root_path>/node_modules/@types/node/index.d.ts' is not a module.
I am sure there is something very basic that I am missing here but I cannot figure out.
我确信我在这里遗漏了一些非常基本的东西，但我无法弄清楚。
Few more things
还有几件事
- I am using Windows 8
- I am using Visual Studio Code
- 我使用的是 Windows 8
- 我正在使用 Visual Studio 代码
Here is how my tsconfig.jsonlooks
这是我的tsconfig.json样子
{
"compilerOptions": {
"target": "es2015",
"module": "commonjs",
"outDir": "lib",
"typeRoots": [
"node_modules/@typings"
]
},
"exclude": [
"node_modules"
]
}
And here is how my webpackconfig.jslooks
这是我的webpackconfig.js样子
var path = require('path');
module.exports = {
entry: './ts/handler.ts',
target: 'node',
module: {
loaders: [
{ test: /\.ts(x?)$/, loader: 'ts-loader' },
{ test: /\.json$/, loader: 'json-loader' }
]
},
resolve: {
extensions: ['.ts', '.js', '.tsx', '.jsx']
},
output: {
libraryTarget: 'commonjs',
path: path.join(__dirname, '.webpack'),
filename: 'handler.js'
},
};
采纳答案by Remo H. Jansen
Instead of using:
而不是使用：
import { Process } from '@types/node';
You need to change your tsconfig.json:
你需要改变你的tsconfig.json：
{
"compilerOptions": {
...
"typeRoots": ["node_modules/@types"]
}
}
After doing that the process variable becomes available as a global.
这样做之后，流程变量就可以作为全局变量使用了。
Sometimes you will need to import from a Node.js module like for example the fsmodule. You can do:
有时您需要从 Node.js 模块导入，例如fs模块。你可以做：
import * as fs from "fs";
You don't need to import fsfrom "node" or from "@types/node".
您不需要fs从“节点”或“@types/node”导入。
You can learn more here.
回答by OrcusZ
It's because inside the node typing file any module has declared with name node.
这是因为在节点类型文件中，任何模块都使用名称node 进行了声明。
If you use
如果你使用
import { Process } from 'node';
TypeScript will try too find a node moduleor node namespace
TypeScript 也会尝试找到节点模块或节点命名空间
Here you can load the complete file using
在这里您可以使用加载完整的文件
import 'node';
In your case you want to get only Process from NodeJS namespace :
在您的情况下，您只想从 NodeJS 命名空间获取 Process ：
import 'NodeJS';
Aftert that you just need to call it like this :
之后你只需要像这样调用它：
class toto implements NodeJS.Process{
}
EDIT :
编辑 ：
If you use TypeScript >= 2.0 you should not need to add import in your file, only if you want to "optimize import"
如果您使用 TypeScript >= 2.0，则仅当您想“优化导入”时才需要在文件中添加导入
