node/nodemon 中是否有对 typescript 的源映射支持? [英] Is there source map support for typescript in node / nodemon?

问题描述

我有一个用 typescript@2 编写的节点项目.

I have a node project written in typescript@2.

我的 tsconfig 将 sourceMap 设置为 true 并生成 *.map.js 文件.当我通过 node 或 nodemon 执行我转译的 *.js JavaScript 文件时，我只看到与 js<相关的错误消息/code> 文件而不是映射的打字稿文件；我认为它完全被忽略了.

My tsconfig has sourceMap set to true and the *.map.js files are generated. When I execute my transpiled *.js JavaScript files via node or nodemon, I only see the error messages relative to the js file and not to the mapped typescript files; I assume it's completely ignored.

sourceMap 支持仅用于浏览器支持吗?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?

Is sourceMap support only intended for browser-support? Or can I use it together with node or nodemon? If the latter, how would I enable it?

我想查看从已执行的 javascript 文件中检测到的与原始打字稿文件相关的运行时错误.

I want to see runtime errors detected from an executed javascript file relative to the original typescript file.

推荐答案

安装源地图支持:

npm install source-map-support

(我也在生产环境中运行，因为它极大地帮助从发生错误时的日志中查找错误.我没有遇到很大的性能影响，但您的体验可能会有所不同.)

(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.)

添加到您的 tsconfig.json:

{
   "compilerOptions": {
      "sourceMap": true
   }
}

运行 JavaScript 文件时，添加 require 参数:

When running your JavaScript file, add the require parameter:

nodemon -r source-map-support/register dist/pathToJson.js

node -r source-map-support/register dist/pathToJson.js

或者，您添加进入调用:

Alternatively, you add in your entry call:

require('source-map-support').install()

但我发现具有多个入口点的项目很乏味.

yet I find this tedious is projects with multiple entry points.

旁注:mocha 也支持 --require/-r 选项，以便在 mocha 中获得 sourcemap 支持也可以用它调用你的测试，例如类似于:

Sidenote: mocha also supports the --require / -r option, so to have the sourcemap support in mocha you can also call your tests with it, e.g. similar to:

NODE_ENV=test npx mocha --forbid-only --require source-map-support/register --exit --recursive ./path/to/your/tests/

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