How can I improve express.js error stack trace? - node.js

Question

I'm using Node with Express as an API. Currently this is the output if there is an unexpected error thrown:
"stack": "APIError: test error\n at new ExtendableError
(/home/user/workspace/test-api/server/helpers/error.ts:25:11)\n at new APIError
(/home/user/workspace/test-api/server/helpers/error.ts:41:5)\n
at app.use (/home/user/workspace/test-api/config/express.ts:112:24)\n
at Layer.handle_error (/home/user/workspace/test-api/node_modules/express/lib/router/layer.js:71:5)\n
at trim_prefix (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:315:13)\n at /home/user/workspace/test-api/node_modules/express/lib/router/index.js:284:7\n
at Function.process_params (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:335:12)\n
at next (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:275:10)\n
at Layer.handle_error (/home/user/workspace/test-api/node_modules/express/lib/router/layer.js:67:12)\n
at trim_prefix (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:315:13)\n
at /home/user/workspace/test-api/node_modules/express/lib/router/index.js:284:7\n
at Function.process_params (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:335:12)\n
at next (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:275:10)\n
at Layer.handle_error (/home/user/workspace/test-api/node_modules/express/lib/router/layer.js:67:12)\n
at trim_prefix (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:315:13)\n
at /home/user/workspace/test-api/node_modules/express/lib/router/index.js:284:7\n
at Function.process_params (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:335:12)\n
at next (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:275:10)\n
at /home/user/workspace/test-api/node_modules/express/lib/router/index.js:635:15\n
at Immediate.next (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:260:14)\n
at Immediate.<anonymous> (/home/user/workspace/test-api/node_modules/express/lib/router/index.js:635:15)\n
at runCallback (timers.js:812:20)\n
at tryOnImmediate (timers.js:768:5)\n
at processImmediate [as _immediateCallback] (timers.js:745:5)",
I would love it if I can display the file, linenumber and function where this happened but I have no clue how to do this.
Can anyone help or point me in the right direction?
For reference, you can see the boilerplate my project is based on here. Express setup can be found in config/express.ts

Answer 1

Try adding source-map-support. Your stack trace is actually showing you the file and line number of the code that triggered an error but it seems to show it on transpiled code. Install the package and call install() inside your entry file:
$ npm install --save-dev source-map-support
// entry.ts
require('source-map-support').install();