Linked Questions
34 questions linked to/from What's a good way to extend Error in JavaScript?
0
votes
1
answer
140
views
The `message` field value is not set in `CustomError` class in NodeJS with the classical inheritance through the function-constructor [duplicate]
This case works just fine:
class CustomError2015 extends Error {
constructor(message) {
super(message); // here the message is set correctly
console.log("Message: " + this.message)...
- 7,293
293
votes
25
answers
293k
views
How do I create a custom Error in JavaScript?
For some reason it looks like constructor delegation doesn't work in the following snippet:
function NotImplementedError() {
Error.apply(this, arguments);
}
NotImplementedError.prototype = new ...
- 70.8k
247
votes
13
answers
128k
views
Custom exception type
Can I define custom types for user-defined exceptions in JavaScript? If so, how would I do it?
- 3,869
140
votes
14
answers
72k
views
Extending Error in Javascript with ES6 syntax & Babel
I am trying to extend Error with ES6 and Babel. It isn't working out.
class MyError extends Error {
constructor(m) {
super(m);
}
}
var error = new Error("ll");
var myerror = new MyError("ll")...
- 37.3k
179
votes
8
answers
144k
views
Handling specific errors in JavaScript (think exceptions)
How would you implement different types of errors, so you'd be able to catch specific ones and let others bubble up..?
One way to achieve this is to modify the prototype of the Error object:
Error....
- 21.6k
135
votes
11
answers
28k
views
Is it possible to get the non-enumerable inherited property names of an object?
In JavaScript we have a few ways of getting the properties of an object, depending on what we want to get.
1) Object.keys(), which returns all own, enumerable properties of an object, an ECMA5 ...
- 2,754
93
votes
6
answers
52k
views
Re-throwing exception in NodeJS and not losing stack trace
How can I rethrow an error or exception in nodejs/javascript and include a custom message.
I have the following code
var json = JSON.parse(result);
and I wanted to include the result content in the ...
- 4,865
67
votes
4
answers
110k
views
How to return from a Promise's catch/then block?
There are many tutorials on how to use "then" and "catch" while programming with JavaScript Promise. However, all these tutorials seem to miss an important point: returning from a then/catch block to ...
- 1,981
33
votes
6
answers
12k
views
How to specify a "caused by" in a JavaScript Error?
In my NodeJS program, I parse some user JSON file.
So I use :
this.config = JSON.parse(fs.readFileSync(path));
The problem is that if the json file is not correctly formated, the error thrown is ...
- 23.7k
19
votes
3
answers
29k
views
How to throw InvalidArgumentException JavaScript?
Objective
Throw InvalidArgumentException in a JavaScript method like one does in Java or similar languages.
Background
I have been trying to familiarize myself with JavaSctipt error handling, and I ...
- 17.3k
24
votes
2
answers
9k
views
Throwing custom exceptions in Javascript. Which style to use?
Douglas Crockford recommends doing something like this:
throw {
name: "System Error",
message: "Something horrible happened."
};
But you could also do something like this:
function ...
- 95.1k
9
votes
3
answers
14k
views
Typescript: 'new' expression, whose target lacks a construct signature, implicitly has an 'any' type.ts(7009)
The following is the code that works best for displaying custom errors in Chrome Devtools, Node.js, etc. Based on this StackOverflow answer.
function CustomErr (message) {
var err = new Error(...
- 1,433
11
votes
2
answers
7k
views
Set Error cause in JavaScript (node.js)
is it possible to specify the cause of an Error in JavaScript (node.js)? I found the Mozilla documentation which defines how to set the message / file / line but not the cause of an error.
The reason ...
- 3,249
4
votes
4
answers
2k
views
Correct way to create custom errors in javascript
What is the correct way to define a custom error in JavaScript?
Searching through SO I've found about 6 different ways to define a custom error, but I'm unsure as to the (dis)advantages to each of ...
- 85
6
votes
2
answers
1k
views
Expressjs - Handling Errors With Middleware
I'm building an API (using Expressjs v4) and typically I've dealt with errors within the route rather than using middleware. For example:
router.use('/', function(req, res, next) {
...
if (err)
...
- 10.6k