DOMException
An implementation of the DOMException class from NodeJS
NodeJS has DOMException built in (from v10.5), but it is not easily available... you can't require or import it from somewhere (unless you use node v17 - at which point it got added to global scope)
This package exposes the DOMException
class that comes from NodeJS itself. (including all of the legacy codes)
Install
npm install node-domexception
npm install node-domexception@1.x
v2.x now depend on global atob
to obtain DOMException
from a error.
which also binds it to NodeJS v16+ (at which point atob
become globally available).
This NodeJS dependency free solution is better for cross env platform solutions.
if you are stuck with cjs then you can only do async import()
from cjs projects.
v1.x used a older tech which depended on node:worker_threads
to obtain
DOMException
which works all the way down to v10.5
v1.x was also written in cjs, so if you want to support NodeJS v10.5+ or can't
use ESM then install v1.x
If are not supporting older NodeJS versions (before v17) then you won't need this package at all.
My personal recommendation is that you update to a newer NodeJS version.
import { DOMException } from 'node-domexception'
import 'node-domexception'
globalThis.DOMException || await import('node-domexception')
import { MessageChannel } from 'worker_threads'
try {
const port = new MessageChannel().port1
const ab = new ArrayBuffer()
port.postMessage(ab, [ab, ab])
} catch (err) {
console.assert(err.name === 'DataCloneError')
console.assert(err.code === 25)
console.assert(err.constructor === DOMException)
}
const e1 = new DOMException('Something went wrong', 'BadThingsError')
console.assert(e1.name === 'BadThingsError')
console.assert(e1.code === 0)
const e2 = new DOMException('Another exciting error message', 'NoModificationAllowedError')
console.assert(e2.name === 'NoModificationAllowedError')
console.assert(e2.code === 7)
console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10)
Background
The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws a DOMException and catch the constructor. This is exactly what this package does for you and exposes it.
This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException.
The instanceof check would not have worked with a custom class such as the DOMException provided by domenic which also is much larger in size since it has to re-construct the whole class from the ground up.
The DOMException is used in many places such as the Fetch API, File & Blobs, PostMessaging and more.
Why they decided to call it DOM, I don't know
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