All Questions
Tagged with javascript node.js
137
questions
-5
votes
0answers
20 views
NodeJS frontEnd and Java backEnd or NodeJS full web app? [closed]
Is it a good approach to have a node-style frontend and a java backend for a web application? or is it better to have a complete NodeJS app?
I wanted to create a java based web application and I have ...
-2
votes
1answer
24 views
Do I need a separate backend (Express) for an Angular project if using AWS for data storage?
So, I'm working on developing my first Angular project with/for a friend of mine and I have a design question before I really get started with things.
I'm going to be storing persistent data on AWS ...
0
votes
1answer
94 views
Rabbitmq create queues dynamically based on number of users
I have a scenario where I have to route a list of messages that I get to respective users.
For suppose if I have
messages = [
{ text: 'hi', user_id: 1 },
{ text: 'hi', user_id: 2 },
{ text: 'hi',...
-2
votes
1answer
92 views
How to warn devs after installing or updating npm packages? [closed]
I want to warn devs in my team to rebuild the docker containers after installing or updating npm packages.
This is because whenever we edit packages in the environment the only way we've found to test ...
1
vote
0answers
44 views
advice for web communication protocol for “streaming” multiple JSON objects to multiple clients
As a hobby / to learn I am building an app in JavaScript using Node.js where a component of it will take input from a client, send it to a server, and then broadcast it to other clients. For ...
7
votes
1answer
900 views
Is it bad practice to require the same module in multiple files in Javascript?
Let’s say I have three files, all of which import a fairly large module. But I’ve divided them because they have different functions. Now each of the JavaScript files needs an initial statement like
...
0
votes
1answer
70 views
Is there a way I can make something happen on my nodejs server at a particular time
I'm not sure that I'm even asking the right question so I hope you guys can point me in the right direction here.
I have a full stack web app which has listings (think eBay, Gumtree, Craigslist) and I ...
-1
votes
1answer
63 views
Mutexes at application logic level
In my node.js app I have a async function that fetches remote documents and caches them on the disk. Upon a retrieval request for a document first checks the disk, if found loads it from the disk ...
0
votes
2answers
976 views
How to handle different types of errors in Clean Architecture?
So, in the process of creating a user there are 4 possible outcomes:
Username is already taken
Email is already taken
Username is invalid
Email is invalid
Here is what I have in the controller for ...
-3
votes
1answer
48 views
Do I need MongoDB (or another type of database) to authenticate with Google?
I'm creating a web application using Node.js and Pug, and have recently been looking at adding external OAuth authentication to this site, using Express and Passport.js.
I've found a lot of examples ...
-2
votes
1answer
56 views
Is there a less complicated alternative to handling this simple mySQL query in Node?
To Put My Question In Better Context...
I am about done writing my first real-world Node application, which would be classified as a REST API. For myself, it was a bit challenging to wrap my head ...
-4
votes
1answer
191 views
Best way to structure reusable code using Node.JS, EJS, and front end JS?
I'm more or less learning the MEAN stack (have yet to start on Angular, so currently using straight vanilla JS for front-end) and part of what I'm building for my portfolio is a drag-and-drop form ...
-2
votes
1answer
153 views
Design pattern for a switching between APIs with no code changes
I'm trying implement in JavaScript/Node.js a data upload functionality. I want to be able to switch between different storage providers, e.g. AWS, GCP, Azure, with no code change, for instance, via ...
3
votes
1answer
42 views
Storing username and password for another site in Node and MongoDB
This is not about storing my user's login details in the app, I already use hash and JWT tokens for that. There is a part of our app where we need to store the login details of the user for another ...
2
votes
3answers
140 views
How should I store time stamps so that it's easily accessible and won't take too much space
tldr at the bottom if you don't want to read all this! :)
First of all the db I'm using is MongoDB! So I've been building a fun project and all has been well but I hit a small problem. Effectively, ...
-2
votes
1answer
47 views
Can a JavaScript SPA launch executables installed on the server?
Context
We have an application that is written in .NET and runs on a Citrix server. This app consists of shortcuts to external tools (like: DameWare, VNC viewer, mtsc.exe, msra.nexe, ...) that are ...
1
vote
1answer
133 views
Memory management in node.js
I'm writing a web server as a test project in node.js
Whats really bothering me so far is the lack of control or even awareness of memory usage. Naturally I want to cache some stuff in RAM for faster ...
1
vote
2answers
222 views
How to refactor duplicated functions with only one difference in parameter list
I've got 2 near-identical functions (NodeJS). One of them queries DB for shop information by its phone number, while the other one queries by its id. I'd like to know if there's a clean way to merge ...
2
votes
1answer
2k views
Form validation code shared in the frontend and backend API?
I have a legacy Java monolithic web application. My goal is to use React on the frontend, keep Java on the backend and add an API for the frontend to use.
My question is how can I write the data ...
2
votes
3answers
1k views
Node.js error handling through each layer
I am looking for a way to handle errors in a Node.js application without getting lots of log entries for the same error event, one from each each affected layer.
This might actually apply to any ...
1
vote
1answer
58 views
Transpiling in npm modules
While recently creating a module for shared functionality between our projects I stumbled upon this question. Should the module be occupied with transpilation of code to older browsers that our ...
3
votes
0answers
111 views
data transfer objects between abstraction layers
I want to create an Express REST API and want to try following the clean architecture ideas. I was reading about it but didn't get the idea of the communication between the abstraction layers.
Let's ...
-1
votes
2answers
685 views
Notify thousands of clients with websockets, are there any caveats?
I'm building a web app, where users can create locations, which are displayed on a map.
Also, users can click on the map objects in order to get to a place details page where further interactions ...
-1
votes
2answers
1k views
NodeJS SocketIO Multiplayer Multiple Game Room Management
I am making a multiplayer card game and am using NodeJS as my server with SocketIO.
My question is how should I be managing multiple game rooms (say an n number of game rooms) ?
Currently I have it ...
3
votes
2answers
333 views
How to test database dependent functionalities?
I have written this function which checks if a user already exists in the application:
async function ValidateUserExists(username, email){
if(!username || !email) throw new Error('Invalid number ...
0
votes
0answers
101 views
Handling user permissions in front-end
I'm building an API that will be used by the front-end in React and I'm not quite sure how I should send the permissions of each user based on their roles. Some fields can only be edited in some ...
1
vote
1answer
110 views
What is a message in relation to javascript's message queue in its event loop?
I'm learning about javascript's event loop, however I'm not understanding what a message is? The resources I find mention how the callback associated with events get added to the message queue, but ...
3
votes
0answers
217 views
Dynamic API Data Validation
I am in the process of building an heavily data-driven web application written in Node.js / Typescript with Mariadb for the database engine. I am trying to put an emphasis on extensibility and DRY ...
0
votes
1answer
386 views
RPC with Express JS? [closed]
I've been working on a project recently where I have an Expressjs server that supplies weather forecast data to its clients. Right now, I'm using express simply as a means of exposing some functions I ...
0
votes
3answers
262 views
If callback function, promises and async/await patterns all can be used to achieve asynchronous behaviour then why don't we stick to one?
As far as I have seen then async/await, callbacks and promises are and can only be used to achieve asynchronous programming. Correct?
So my questions are:
1) Is it correct that the former three is ...
1
vote
0answers
211 views
Refactor MVC to more scalable architecture?
Months ago I began a new web project which, in the beggining, seemed like a small application with virtually few users. I began the project by using the awesome Hackathon Starter WebApp Boilerplate by ...
11
votes
3answers
4k views
How can I prevent a user from editing my code in their browser?
Description
I'm designing a Node.JS application (more like a full website). The app will send five JavaScript files and will have <script> tags linking them together.
Question
How can I prevent ...
-1
votes
3answers
264 views
Writing elegant promises in Node.js
I am having a real difficult time writing some clean code with a simple user registration/login manager. I am trying to stay out of nesting/callback hell, and am also not seeing any benefit in using ...
-3
votes
2answers
300 views
Is this an anti pattern in Javascript?
A common pattern I've been using for JS/NodeJS applications is the following:
import { utility1, utility2 }
function exampleScript() {
utility1()
utility2()
// Does something
}
Basically my main ...
1
vote
1answer
341 views
What is it that is so hard about ES6 modules for Node? [closed]
It seems like ES6 imports for Node have been a bugbear for a while. There is the --experimental-modules flag, or options like using Babel - but AFAIK ES6 modules still aren't supported in vanilla Node....
1
vote
1answer
42 views
JavaScript/NodeJS Class Extension vs Adding Properties
I am currently writing a Discord bot and have reached the point of needing a refactor. With this being my first stab at JavaScript/NodeJS and making a bot in general, there are a lot of mistakes I ...
-1
votes
1answer
90 views
How to develop larger client-site in-browser apps in javascript?
I'm new to javascript environment (I have background in C++ physical simulations and game engines). With rise of HTML5 and WebGL I was thinking I'd like to try make some games/3D editors using ...
0
votes
1answer
513 views
Class definitions in static getter methods
[Node.js / CommonJS]
I'm creating a single GitHub repo for my tool which has a Core, Control, Server, and Client library. It's unlikely that all of them will be used at the same time.
I'd like my ...
3
votes
1answer
190 views
How to name two functions that could be named the same?
I have a node app with a queue for processing jobs in the background. I have a file that exports a function which when run, creates a job in my queue. In that file, I also have the handler for this ...
0
votes
1answer
75 views
Performant way for archiving image files in NodeJS on each user requests
Scenario:
Images are uploaded to the server once in a while. Users send an API request for downloading all of those images that were uploaded to the server (Images reside in the server itself). ...
1
vote
0answers
68 views
Exporting functions usable by both client-side and server-side
So this isn't a question on how to do it, but more of a clarification on how it works. I'm using Vue and I'm creating a file that's usable by on both the client side and the server side (logic should ...
0
votes
1answer
71 views
What types of operations should go into Node.js as opposed to client side javascript functions
I am building a web app with a lot of different API calls: our own proprietary REST API, third-party library API calls, etc. All of these calls either retrieve data, update data, delete data, or ...
2
votes
1answer
64 views
Where should I do integration tests in a multi package project
Background:
I am working on a node project which consists of a core package and several addon packages. For the end product to work, the core package and atleast one of the addon packages should be ...
0
votes
1answer
98 views
architecture - relation of scraper and orm classes
Consider the following application structure.
The scraper class extracts the necessary information from a page, and I want to save it to the DB.
The ORM class is a wrapper around sequelize.js. It ...
-4
votes
1answer
2k views
How does the typescript transpile function work
Assume the following:
/// file.ts
var x = "hello";
x = 1;
console.log(x);
/// file.ts
function transpile(fileName) {
...
}
What steps would typescript take to transpile the file?
How and when ...
5
votes
1answer
3k views
Microservices Architecture separating backend and front end
We are trying to move (slowly) into Microservices architecture from our current monolithic based architecture. I've done my research on microservices architecture and would like to get some feedback ...
8
votes
4answers
23k views
Is it bad design to internally call API endpoints from within the API instance?
For context, I am running a REST API built with Node.js. Because of callbacks and some complex DB calls, I have a chain of functions that are async but also unique, so it's tough to reduce redundancy. ...
-1
votes
1answer
329 views
I'm building an app with Node, Express, and MongoDB. Is AngularJS necessary?
Node, Express, and MongoDB are really connected so I can understand why they are frequently used together. For a web app of medium complexity, can I get away with only using HTML/CSS and EJS for the ...
5
votes
2answers
163 views
Tracking state changes based on duration of time in state
I've been building a monitoring system that checks whether a device is alarmed or not, and if so, sends notifications to relevant users based on how long a device is in a particular state. Here's an ...
1
vote
0answers
68 views
designing better and crisp server.js (the file which is called to start node application 'e.g. node server.js')
While creating server.js file we need to provide routes information as
var Login = require('./routes/login.js');
app.use('/login', Login);
Now, suppose the node project is a REST services project. ...
