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Undefined variable causes huge verbose output from `esm.js`

I'm not sure why, but since upgrading to Node v16 from Node v14, I get this error only when I run node like node -r esm and there is a ReferenceError like:
ReferenceError: myVar is not defined
It causes a massive, 5000 line output of the esm.js module. How can I get rid of this?
const __global__ = this;(function (require, module, __shared__) { var __shared__;const e=module,t={Array:global.Array,Buffer:global.Buffer,Error:g
lobal.Error,EvalError:global.EvalError,Function:global.Function,JSON:global.JSON,Object:global.Object,Promise:global.Promise,RangeError:global.Ran
geError,ReferenceError:global.ReferenceError,Reflect:global.Reflect,SyntaxError:global.SyntaxError,TypeError:global.TypeError,URIError:global.URIE
rror,eval:global.eval},r=global.console;module.exports=(function(e){var t={};function r(i){if(t[i])return t[i].exports;var n=t[i]={i:i,l:!1,export
s:{}};return e[i].call(n.exports,n,n.exports,r),n.l=!0,n.exports}return r.d=function(e,t,r){Reflect.defineProperty(e,t,{configurable:!0,enumerable
:!0,get:r})},r.n=function(e){return e.a=e,function(){return e}},r(r.s=2)})([(function(e,t){var r;t=e.exports=$,"object"==typeof process&&process,r
=function(){},t.SEMVER_SPEC_VERSION="2.0.0";var i=256,n=Number.MAX_SAFE_INTEGER||9007199254740991,s=t.re=[],a=t.src=[],o=0,u=o++;a[u]="0|[1-9]\\d*
";var l=o++;a[l]="[0-9]+";var c=o++;a[c]="\\d*[a-zA-Z-][a-zA-Z0-9-]*";var p=o++;a[p]="("+a[u]+")\\.("+a[u]+")\\.("+a[u]+")";var h=o++;a[h]="("+a[l
]+")\\.("+a[l]+")\\.("+a[l]+")";var f=o++;a[f]="(?:"+a[u]+"|"+a[c]+")";var d=o++;a[d]="(?:"+a[l]+"|"+a[c]+")";var m=o++;a[m]="(?:-("+a[f]+"(?:\\."
+a[f]+")*))";var v=o++;a[v]="(?:-?("+a[d]+"(?:\\."+a[d]+")*))";var g=o++;a[g]="[0-9A-Za-z-]+";var y=o++;a[y]="(?:\\+("+a[g]+"(?:\\."+a[g]+")*))";v
ar x=o++,b="v?"+a[p]+a[m]+"?"+a[y]+"?";a[x]="^"+b+"$";var w="[v=\\s]*"+a[h]+a[v]+"?"+a[y]+"?",E=o++;a[E]="^"+w+"$";var S=o++;a[S]="((?:<|>)?=?)";v
ar R=o++;a[R]=a[l]+"|x|X|\\*";var P=o++;a[P]=a[u]+"|x|X|\\*";var _=o++;a[_]="[v=\\s]*("+a[P]+")(?:\\.("+a[P]+")(?:\\.("+a[P]+")(?:"+a[m]+")?"+a[y]
+"?)?)?";var k=o++;a[k]="[v=\\s]*("+a[R]+")(?:\\.("+a[R]+")(?:\\.("+a[R]+")(?:"+a[v]+")?"+a[y]+"?)?)?";var I=o++;a[I]="^"+a[S]+"\\s*"+a[_]+"$";var
A=o++;a[A]="^"+a[S]+"\\s*"+a[k]+"$";var N=o++;a[N]="(?:^|[^\\d])(\\d{1,16})(?:\\.(\\d{1,16}))?(?:\\.(\\d{1,16}))?(?:$|[^\\d])";var C=o++;a[C]="(?
:~>?)";var O=o++;a[O]="(\\s*)"+a[C]+"\\s+",s[O]=RegExp(a[O],"g");var T=o++;a[T]="^"+a[C]+a[_]+"$";var M=o++;a[M]="^"+a[C]+a[k]+"$";var L=o++;a[L]=
"(?:\\^)";var D=o++;a[D]="(\\s*)"+a[L]+"\\s+",s[D]=RegExp(a[D],"g");var F=o++;a[F]="^"+a[L]+a[_]+"$";var j=o++;a[j]="^"+a[L]+a[k]+"$";var V=o++;a[
V]="^"+a[S]+"\\s*("+w+")$|^$";var G=o++;a[G]="^"+a[S]+"\\s*("+b+")$|^$";var B=o++;a[B]="(\\s*)"+a[S]+"\\s*("+w+"|"+a[_]+")",s[B]=RegExp(a[B],"g");
v..........
How can I stop node from printing this to the console?

Try resetting your computer. It works for me.

Uncaught InvalidData: data did not match any variant of untagged enum ArgsEnum

I'm enthusiastic about Deno so I'm giving it a try. Found a tutorial on building a REST API here.
So, when I'm trying to run it, I get this InvalidData error:
error: Uncaught InvalidData: data did not match any variant of untagged enum ArgsEnum
at unwrapResponse ($deno$/ops/dispatch_json.ts:43:11)
at Object.sendAsync ($deno$/ops/dispatch_json.ts:98:10)
at async Object.connect ($deno$/net.ts:216:11)
at async Connection.startup (https://deno.land/x/postgres/connection.ts:138:17)
at async Client.connect (https://deno.land/x/postgres/client.ts:14:5)
at async Database.connect (file:///Users/svenhaaf/git/deno/logrocket_deno_api/db/database.js:17:5)
Now, it looks to me that something is wrong when trying to connect to the database, but I can't really figure out what.
What does this InvalidData error mean? How should I fix this?
FYI my deno --version prints:
deno 0.42.0
v8 8.2.308
typescript 3.8.3
Code:
I cloned the repo from https://github.com/diogosouza/logrocket_deno_api, and in config.js, I edited line 1 from const env = Deno.env() to const env = Deno.env, since it looks like Deno.env became an object instead of a method.

The tutorial is not using versioned URLs, and deno-postgres version that is being used is not compatible with v0.42.0, since https://deno.land/x/postgres/mod.ts is pulling from master
Change db/database.js to import from https://deno.land/x/postgres#v0.3.11/mod.ts, since v0.3.11 is the correct version for Deno v0.42.0
import { Client } from "https://deno.land/x/postgres#v0.3.11/mod.ts";
Remember to always use the version in the URL if you don't want the code to stop working when a new Deno or package version is released.

Cannot put winston inside a nodejs module

I'm separating my application in modules, but each of these modules have functions that must me logged. So my idea was to create a file winstonConfig.js which would configure the winston, and then I'd require this file in each of the modules that need to log things. Here's winstonConfig.js:
var winston = require('winston');
winston.add(winston.transports.Riak, { level: 'warn' });
winston.add(winston.transports.File, { filename: 'mylogfile.log', level: 'silly' });
exports.log = winston.log;
exports.debug = winston.debug;
exports.error = winston.error;
(btw, is there a way to export everything once?)
but when I require('./winstonConfig.js') in my index.js, I get:
node_modules/winston/lib/winston/logger.js:481
var instance = created ? transport : (new (transport)(options));
^
TypeError: transport is not a constructor
but the exact same code (without exports) will work without any problem when put in index.js (the problem is that then I cannot import this to other modules)

I got the same error with a new project, but when I was trying to use "logger.transports.DailyRotateFile". Then I realized that my code (that was copied from another project) just works for winston 1 (same version used on the other project). So, I just downgraded the lib to version 1 and everything worked normally:
$ npm uninstall winston --save
$ npm install winston#1.x.x --save
But if you want to use winston 2, I found the solution below to use DailyRotateFile - and, probably, there is a similar solution to use other kind of transports.
var winston = require('winston'), expressWinston = require('express-winston');
winston.transports.DailyRotateFile = require('winston-daily-rotate-file');

It looks like you're missing:
require('winston-riak');
I get the same error with your code.
If I comment out the addition of the Riak transport I get no error.
If I require winston-riak:
var winston = require('winston');
require('winston-riak');
winston.add(winston.transports.Riak, { level: 'warn' });
winston.add(winston.transports.File, { filename: 'mylogfile.log', level: 'debug' });
exports.log = winston.log;
exports.debug = winston.debug;
exports.error = winston.error;
I get error: TypeError: riakjs.getClient is not a function. This appears to be because 'winston-riak' tries to execute riakjs.getClient(options) but, per https://github.com/mostlyserious/riak-js/issues/234, getClient is the exported function, rather than a method of the exported object. The winston-riak module hasn't been updated for 5 years. It seems it is not compatible with the current riak-js, which was updated 2 years ago.

Testing with Mocha and requirejs

Im trying to get a testing environment for JavaScript set up but I am having some trouble with Mocha and requirejs. So far I have installed Mocha and that works as it should because I have tested it with the sample test from the documentation. The problem arises when I try and require some of the modules I want to test. At the top of my test.js file I have this:
var assert = require("assert"),
door = require( '../../assets/scripts/modules/door' );
But i get this error message in the console.
ReferenceError: define is not defined
Its referring to the first line of the door.js file that is.
define(['../utils/templating/hogan', '../models/ApiCaller', 'Backbone'], function (hogan, ApiCaller) {
I have also tried requiring requirejs like so...
var assert = require("assert"),
requirejs = require( '../../assets/scripts/require' ),
door = require( '../../assets/scripts/modules/door' );
As you have probably guessed im new to testing JavaScript and any explanation or solution would be great.
Thanks.

See if this gist https://gist.github.com/michaelcox/3800736 is helpful for you.

Uncaught exception with qunit and jquery

I'm facing an issue while trying to get javascript unit tests to work at the command line using qunit.
Here's some sample code to reproduce the error:
file util.js:
function abc() {
return 'abc';
}
if (typeof module !== 'undefined' && module.exports) {
module.exports = {
abc: abc
};
}
file util-tests.js
var qunit = require("qunit");
test("Test abc function", function () {
equal(util.abc(), 'abc');
});
With these files, I can run tests using the following command (gives a table-like output in the shell with the test results):
qunit -c util:util.js -t util-tests.js
Now it breaks if I add the following to util.js
$(document).ready(function () {
/* some code here */
});
Here's the error output:
qunit -c util:util.js -t util-tests.js
Testing /home/mfrere/jstst/util.js ... [Error: Uncaught exception in child process.]
same problem with:
var a = $;
or:
var a = document;
So this makes me think that I need to import jQuery somehow, so I thought about adding jquery.js as a dependency to the command, like this:
qunit -c util:util.js -t util-tests.js -d jquery.js
The above command gives me the same 'Uncaught exception' error, even if util.js doesn't contain any reference to '$'.
I'll probably need to do something else to get qunit to recognize 'document' as well, but I don't know what or how.
Now here's my question: what should I do to get this to work? It is important to keep in mind I want to test my files at the command line, not in a browser.
Just in case I did something wrong in the setup process, this is how I installed node/qunit (under ubuntu):
git clone git://github.com/creationix/nvm.git ~/.nvm
in .bashrc, I added the following line:
source ~/.nvm/nvm.sh
picked a specific version of node
nvm install v0.9.2
nvm alias default 0.9
and installed qunit
npm install -g qunit
finally I had to add this in .bashrc as well:
export NODE_PATH=~/.nvm/v0.9.2/lib/node_modules

You haven't imported jQuery:
$ = require('jquery'),
jQuery = require('jquery');
If you're using browserify, change that to 'jquery-browserify'.