node / nodemon 中是否有对 typescript 的源映射支持？
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Is there source map support for typescript in node / nodemon?
提问by k0pernikus
I have a node project written in typescript@2.
我有一个用 typescript@2 编写的节点项目。
My tsconfig has sourceMapset to trueand the *.map.jsfiles are generated. When I execute my transpiled *.jsJavaScript files via nodeor nodemon, I only see the error messages relative to the jsfile and not to the mapped typescript files; I assume it's completely ignored.
我的 tsconfig 已sourceMap设置为true并*.map.js生成文件。当我*.js通过node或执行我转译的JavaScript 文件时nodemon，我只看到与js文件相关的错误消息，而不是与映射的打字稿文件相关的错误消息；我认为它完全被忽略了。
Is sourceMapsupport only intended for browser-support? Or can I use it together with node or nodemon? If the latter, how would I enable it?
是sourceMap仅支持用于浏览器的支持？或者我可以将它与 node 或 nodemon 一起使用吗？如果是后者，我将如何启用它？
I want to see runtime errors detected from an executed javascript file relative to the original typescript file.
我想查看相对于原始打字稿文件从已执行的 javascript 文件中检测到的运行时错误。
采纳答案by k0pernikus
Install source map support:
安装源地图支持：
npm install source-map-support
(I run in in production as well, as it immensely helps finding bugs from the logs of when an error an occurs. I did not experience a large performance impact, yet your experience may be different.)
（我也在生产中运行，因为它极大地帮助从发生错误时的日志中查找错误。我没有遇到过很大的性能影响，但您的体验可能会有所不同。）
Add to your tsconfig.json:
添加到您的tsconfig.json：
{
"compilerOptions": {
"sourceMap": true
}
}
When running your JavaScript file, add the require parameter:
运行 JavaScript 文件时，添加 require 参数：
nodemon -r source-map-support/register dist/pathToJson.js
node -r source-map-support/register dist/pathToJson.js
Alternatively, you add in your entry call:
或者，您在入口调用中添加：
require('source-map-support').install()
yet I find this tedious is projects with multiple entry points.
但我发现这很乏味，这是具有多个入口点的项目。
Sidenote: mochaalso supports the --require/ -roption, so to have the sourcemap support in mocha you can also call your tests with it, e.g. similar to:
旁注：mocha还支持--require/-r选项，因此要在 mocha 中获得源映射支持，您还可以使用它调用您的测试，例如类似于：
NODE_ENV=test npx mocha --forbid-only --require source-map-support/register --exit --recursive ./path/to/your/tests/
回答by Stephen Paul
I recently got this working in my express app. Steps as follows:
我最近在我的快递应用程序中得到了这个。步骤如下：
Install the required library:
安装所需的库：
npm install --save-dev source-map-support
npm install --save-dev source-map-support
In your entry point (eg app.ts):
在您的入口点（例如app.ts）：
require('source-map-support').install();
require('source-map-support').install();
In your app.ts, you may also require better logging for errors within promises:
在您的 中app.ts，您可能还需要更好地记录 Promise 中的错误：
process.on('unhandledRejection', console.log);
process.on('unhandledRejection', console.log);
In your tsconfig, under compilerOptions:
在您的tsconfig下compilerOptions：
"inlineSourceMap": true
"inlineSourceMap": true
回答by mvermand
I found this npm module which seems to do the trick:
我发现这个 npm 模块似乎可以解决问题：
https://github.com/evanw/node-source-map-support
https://github.com/evanw/node-source-map-support
run npm install source-map-support --saveat the root of your node project and add import 'source-map-support/register'to your main.ts or index.ts file.
npm install source-map-support --save在您的节点项目的根目录运行并添加import 'source-map-support/register'到您的 main.ts 或 index.ts 文件中。
That's it.
而已。
回答by Bruno Grieder
Source map support works perfectly fine with node
源地图支持与节点完美配合
All you need to do is add
您需要做的就是添加
"source-map-support": "0.4.11",
to dependenciesor dev-dependenciesin package.jsonby running
通过运行到dependencies或dev-dependencies进入package.json
npm install --save source-map-support
And in your entry point ts file, simply add at the top
在您的入口点 ts 文件中，只需在顶部添加
require('source-map-support').install()
(note: this is calling nodeJS require- there is no need for source-map-support definition files)
（注意：这是调用 nodeJS require- 不需要 source-map-support 定义文件）
