37 lines
1.5 KiB
Markdown
37 lines
1.5 KiB
Markdown
|
# DOMException
|
||
|
|
An implementation of the DOMException class from NodeJS
|
||
|
|
|
||
|
|
This package implements the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class that comes from NodeJS itself. (including the legacy codes)
|
||
|
|
NodeJS has DOMException built in, but it's not globally available, and you can't require/import it from somewhere.
|
||
|
|
|
||
|
|
The only possible way is to use some web-ish tools that have been introduced into NodeJS that throws an error and catch the constructor.
|
||
|
|
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.
|
||
|
|
|
||
|
|
```js
|
||
|
|
import DOMException from 'node-domexception'
|
||
|
|
import { MessageChannel } from 'worker_threads'
|
||
|
|
|
||
|
|
async function hello() {
|
||
|
|
const port = new MessageChannel().port1
|
||
|
|
const ab = new ArrayBuffer()
|
||
|
|
port.postMessage(ab, [ab, ab])
|
||
|
|
}
|
||
|
|
|
||
|
|
hello().catch(err => {
|
||
|
|
console.assert(err.name === 'DataCloneError')
|
||
|
|
console.assert(err.code === 25)
|
||
|
|
console.assert(err instanceof 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)
|
||
|
|
```
|