All Questions
Tagged with error-handling javascript
51 questions
1
vote
3
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1k
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Math calculation JavaScript. Am I using Objects correctly? Can I use methods / functions to shorten my code further? Also error logging?
Context- CRM system, front-end form.
Requirement- Within a form users have to give a rating to a section based on user inputs, each rating has different weighting. The rating is stored in an option ...
- 35
2
votes
1
answer
171
views
Command handlers in node.js
Description
This javascript code uses tmi.js to listen for chat messages in a Twitch chat and perform certain actions depending on their content. In the sample code ...
- 113
2
votes
1
answer
47
views
error tracking in api endpoint
I have built a simple Nuxt 3 app and have some custom api endpoints.
I am currently tracking the user query and response statuses to have some insight when something goes wrong and that the app is ...
- 155
0
votes
1
answer
341
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Google App Script Automation for User Onboarding
Background
I am a relatively new developer(> 2 years coding) working as an intern for a smaller company, as part of a now 4 person team. We had two other team members, one our system admin and the ...
- 3
2
votes
0
answers
295
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JavaScript proxy for better stack traces from external libraries
I've been using the excellent pg-promise library for a few years now, but my primary irk with it is that the stack traces are sometimes unhelpful. For example, the following test will fail (currently ...
- 133
6
votes
1
answer
1k
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Implementation of exponential backoff algorithm
You can read about the algorithm here.
An exponential backoff algorithm retries requests exponentially, increasing the waiting time between retries up to a maximum backoff time. An example is:
Make ...
- 368
9
votes
3
answers
3k
views
Error solution: Uncaught TypeError
Uncaught TypeError: document.getElementById(...) is null
I have a single JavaScript file that is connected to multiple pages. The below snippet is a function that is used for a single page. The above ...
user231248
1
vote
1
answer
57
views
Handling errors in an input based program
I wrote a program which creates a svg-group that contains several arranged rectangles with passages inbetween to reach all of the rectangles inside of an area selected by the user. Each rectangle ...
- 119
2
votes
1
answer
520
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Blocking requests within Express
Is this the correct way to block requests in Express?
app.js
...
- 255
-1
votes
1
answer
1k
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Try-catch-finally snippet [closed]
Using visual studio I created a snippet which helps me surround my already written or new code into a try-catch-finally block. I use axios for REST so there had to be separate error handling method so ...
- 169
4
votes
1
answer
1k
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Node.js http retry do while mechanism
I have implemented a simple do/while loop to handle a http request to a third-party. I don’t know when the data I receive will have elements in its array so I retry up to 10 times until the array ...
- 41
3
votes
0
answers
25
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A XMLHttp Request in the browser
Building on a previous answer and an attempt to write a comprehensive XMLHttpRequest example that covers all kinds of possible errors and return them to caller ...
- 205
0
votes
1
answer
131
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#Error Handling- Propagating errors to calling function.
Im new to javascript programming and i am required to make a web app. Node.js will be used as the js runtime environment. In order to minimize the amount of time needed for debugging as the app ...
1
vote
2
answers
400
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Function to map letters to numbers
I have a method that converts characters to numbers.
It expects a single alphabetical character and returns the equivalent number.
For example, if A is provided it returns 1, for B it returns 2.
If an ...
- 111
1
vote
2
answers
112
views
Error handling for a simple 'fetch some data, then save the data' Node function
This is a fairly simple bit of code:
...
- 1,298
3
votes
0
answers
46
views
Creating chart from data fetched from backend
I have a javascript function written which I think is horrible for multiple reasons (which I have tried to mention in the comments in code below).
I want to give it a rewrite following some best ...
- 161
5
votes
1
answer
207
views
Resource closing in a promise chain
This is some code that fetches a result from a database. It connects, makes a query, processes the query, then has to close the DB (under all possible code paths) and return the result.
It seems ...
- 3,948
3
votes
2
answers
4k
views
Timeout implementation of fetch
After doing some research on google i didn't find any good info on how to implement timeout with fetch (looks like there are multiple proposals but that's about it so nothing has implemented it). For ...
- 133
1
vote
2
answers
59
views
Parameter guards for Firebase calls
I have code to ensure parameters existence all over the place. Is there a better way to do it? So that I do not have so many repeated codes inside different functions
...
- 167
0
votes
2
answers
1k
views
Node.js error handling using merely if else without try catch
I'm confused why you need to use try catch. I made a simply utils like this, and use it on my models' callback.
in my utils/error.js
...
1
vote
1
answer
180
views
Hello World Node application with error handling
I wrote this simple server in node. Actually my goal is to better understand exception handling best practices in Node.
So my question is more specific.
Is this code bullet proof to exceptions? Are ...
user126614
4
votes
1
answer
3k
views
AngularJS recursive function call with $timeout
I have created a recursive function call in AngularJS and just wonder if is there a better way to solve this problem? The code works perfectly.
My code is the following:
...
- 313
5
votes
1
answer
371
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An object for passing a chain of errors in JavaScript
I want to pass errors in errors in order to know exactly the chain of causes, but without augmenting or even reading any stack until this becomes really necessary. And this is how I would achieve this:...
- 153
4
votes
1
answer
76
views
Takes function and throws exception if passed function doesn't throw an exception
The code below is part of a toy test assertion library I've written.
I'm looking for feedback specifically on lines 4 - 9. I'd like to extract them from the ...
- 153
1
vote
1
answer
344
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Logging errors in google analytics
Apart from general JavaScript knowledge, this snippets requires someone who knows how to properly use Google Analytics API.
To log errors on my site, I use this code:
...
- 262
2
votes
0
answers
70
views
Javascript Either
I wrote this up out of necessity, then realized that I actually needed to write it in PHP. Just so I didn't waste the last hour, I'd like a review of it. My concerns:
This is my first time using the ...
- 16.3k
3
votes
0
answers
260
views
Keeping error details out of responses (Restify)
I'd like to make sure error details are never sent out in responses from my restify-powered API. The best way to achieve that seemed to be via wrapping server.formatters in another function which ...
- 131
3
votes
1
answer
1k
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Loading a database table using a promise chain
I am creating a util module that I'm using to communicate with a MS-SQL database. I want each public method to return a promise. I started with a private function that executes a DB query and returns ...
- 115
2
votes
1
answer
149
views
Handling success and failure when retrieving product information
I've got an Angular controller where I have two functions that are repeated inside two functions:
...
2
votes
2
answers
286
views
Handling rejected HTTP responses with status 401
I'm kinda new to javascript and have question about it. Now my practical project is growing a bit bigger. I got the following if else statement. Is it possible to refactor this ? Should i use an use ...
- 193
0
votes
2
answers
440
views
Concatenating multiple strings from a JSON response
I would like to concatenate a series of strings populated from an XHR response. So, I've chosen to do it like this:
...
- 9
2
votes
2
answers
73
views
Controller method to validate and save
I have built RESTful web services. The services endpoints have a similar logic:
If the input validation succeeds, do a database operation and return the result.
If the db operation fails, return the ...
- 121
1
vote
1
answer
130
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Logging out using nested promises
Is it OK to do that ?
for example, I have my log out service
...
- 183
4
votes
1
answer
80
views
Continuable if error is null
I made a method that I can use to avoid having to handle errors from callbacks.
What it does is, call the passed method only if the first argument is null.
So essentially it will bypass to the last ...
- 141
7
votes
1
answer
208
views
LiveDate version 2
LiveDate has the ability to display the current date either by asynchronously fetching the time from a server or by just using the client system date. It's only as ...
- 2,591
3
votes
0
answers
155
views
Sourcemap translator service
This is my first attempt to a serious Node.js application, I've tried to follow the async style of Node at my best, but I have several doubts and I am sure that this code can be massively improved.
...
- 255
2
votes
1
answer
133
views
Validate IP address and create a registration attempt
I'm a C++/Python developer attempting to learn JavaScript, but I'm struggling to write clean code. I've read that async.waterfall and Promises are two ways to flatten the code a bit, but my ...
- 123
0
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1
answer
10k
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Sorting products by name or price
Lets preface this by saying that when it comes to javascript, I am a hack. I make what I need happen by cobbling together crappy, inefficient, redundant code. I want to get better.
Recently I was ...
chris
0
votes
1
answer
346
views
Handling all error conditions on success or failure response
I'm working on a screen where I sent a request and I get response in two types.
One is success and contains the below format:
...
- 109
4
votes
2
answers
179
views
Querying MongoDB for information on a collection of books
I have this huge chunk of code. Is there any better to write this code, or am I too paranoid that I check every MongoDB query for error?
The logic is here:
...
- 337
1
vote
3
answers
84
views
3
votes
1
answer
8k
views
Mongoose promise & error handling
I search for rails-like way of writing NodeJS code and it's more then hard to find the right way. The code quickly become bloated and unreadable. I would like my code to be as clean as possible.
...
- 171
11
votes
4
answers
2k
views
Writing null-safe code to set form values
I will ask my question using the following example:
HTML
...
- 597
4
votes
1
answer
1k
views
If vs try/catch
The following code, written in synchronous Node.js and intended to be used as a shell script, nests a try/catch inside a conditional.
Because both the conditional and the try/catch serve a similar ...
user51143
5
votes
1
answer
433
views
Reading the contents of an XPI file
I wrote this code to list contents of an XPI file and then read the contents in it.
I was thinking of these areas of improvement:
I put the zr.open in the ...
- 261
3
votes
1
answer
260
views
Seeding a file with fake records - doing concurrent updates
I need to seed a database with user data.
When trying to write records to a file using sqlite3 with node, I tried writing the logic in a naive manner, without any error checks - but it was failing ...
- 131
6
votes
1
answer
262
views
Structuring functions receiving and returning promises?
I keep running into the same pattern with code using promises in javascript.
When writing a function which takes a promise and returns a promise, obviously I want to reject the promise I'm returning ...
- 163
4
votes
2
answers
105
views
Writing a user's profile image to disk using nested Node.JS closures
I am writing non-blocking code as it should be in Node.JS. If I want run function A after B I do it using callback.
But I find this style guide:
Use closures, but don't nest them. Otherwise your ...
- 361
2
votes
1
answer
400
views
Saving and listing Category model
I have this ExpressJS route for saving and listing Category model.
...
- 349
3
votes
2
answers
120
views
