Debugging Node JS | skybert.net

Debugging how node searches for modules to load (require)

Say you've got a piece of JavaScript that says:

var SchemaAssembler = require("my-module/myComponent").SchemaAssembler;

And this fails to load, node giving a mediocre:

{ Error: Cannot find module my-module/myComponent }

You can investigate this by setting the environment variable NODE_DEBUG:

export NODE_DEBUG=module
# node ....main.js ....
[..]
MODULE 14489: Module._load REQUEST my-module/myComponent parent:
  /opt/escenic/waiter/recipe/recipe.js

MODULE 14489: looking for "my-module/myComponent" in
["/opt/escenic/waiter/recipe/node_modules",
  "/opt/escenic/waiter/node_modules",
  "/opt/escenic/node_modules",
  "/opt/node_modules",
  "/node_modules",
  "/root/.node_modules",
  "/root/.node_libraries",
  "/usr/lib/node"]