What does the ELIFECYCLE Node.js error mean?
It’s basically saying it fails to spawn your process not due to permission but to an error in your script. Source You don’t have any problem executing NODE_ENV=production node app.js ?
node.js
Error: EACCES: permission denied
This command fix the issue. It worked for me:
Why am I getting “Error socket hang up” response?
I recently got this socket hang up problem. I researched for a few days until I found a solution that worked for me. So, maybe this can help. It worked for me to add the http(s)Agent property with keepAlive: true in creating the http client. Here’s an example of what it might look like: This property is responsible for managing the … Read more
npm ERR! code UNABLE_TO_GET_ISSUER_CERT_LOCALLY
npm E A quick solution from the internet search was npm config set strict-ssl false, luckily it worked. But as a part of my work environment, I am restricted to set the strict-ssl flag to false. Later I found a safe and working solution, this worked perfectly and I got a success message Happy Hacking! by not setting … Read more
NodeJS – What does “socket hang up” actually mean?
I’m building a web scraper with Node and Cheerio, and for a certain website I’m getting the following error (it only happens on this one website, no others that I try to scrape. It happens at a different location every time, so sometimes it’s url x that throws the error, other times url x is fine and it’s a … Read more
The difference between “require(x)” and “import x”
This simple diagram will help you understand the difference between require and import. Apart from that, You can’t selectively load only the pieces you need with require but with import, you can selectively load only the pieces you need, which can save memory. Loading is synchronous(step by step) for require on the other hand import can be asynchronous(without waiting for previous import) so it can perform a little better … Read more
Discord.js sending a message to a specific channel
You didn’t provide any code that you already tested so I will give you the code for your ready event that will work! Be careful that your channel id a string. Let me know if it worked, thank you! 2020 Jun 13 Edit: A Discord.js update requires the cache member of channels before the get method. If … Read more
NodeJS / Express: what is “app.use”?
The app object is instantiated on creation of the Express server. It has a middleware stack that can be customized in app.configure()(this is now deprecated in version 4.x). To setup your middleware, you can invoke app.use(<specific_middleware_layer_here>) for every middleware layer that you want to add (it can be generic to all paths, or triggered only on specific path(s) your server handles), … Read more
ExpressJS – throw er Unhandled error event
You had run another server use the same port like 8080. Maybe you had run node app in other shell, Please close it and run again. You can check PORT no. is available or not using Alternatively, you can use lsof:
Significance of port 3000 in Express apps
3000 is a somewhat arbitrary port number chosen because it allows you to experiment with express without root access (elevated privilege). Ports 80 and 443 are the default HTTP and HTTPS ports but they require elevated privilege in most environments. Using port 3000 in examples also helps indirectly emphasize that you ideally want to put your express app behind nginx or Apache httpd or … Read more