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42 lines
1.6 KiB
Markdown
42 lines
1.6 KiB
Markdown
# DOMException
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An implementation of the DOMException class from NodeJS
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This package implements the [`DOMException`](https://developer.mozilla.org/en-US/docs/Web/API/DOMException) class, from NodeJS itself.
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NodeJS has DOMException built in, but it's not globally available, and you can't require/import it from somewhere.
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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.
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This way you will have the same class that NodeJS has and you can check if the error is a instance of DOMException.
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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.
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```js
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import DOMException from 'node-domexception'
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hello().catch(err => {
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if (err instanceof DOMException) {
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...
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}
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})
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const e1 = new DOMException("Something went wrong", "BadThingsError");
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console.assert(e1.name === "BadThingsError");
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console.assert(e1.code === 0);
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const e2 = new DOMException("Another exciting error message", "NoModificationAllowedError");
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console.assert(e2.name === "NoModificationAllowedError");
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console.assert(e2.code === 7);
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console.assert(DOMException.INUSE_ATTRIBUTE_ERR === 10);
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```
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## APIs
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This package exposes two flavors of the `DOMException` interface depending on the imported module.
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### `domexception` module
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This module default-exports the `DOMException` interface constructor.
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### `domexception/webidl2js-wrapper` module
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This module exports the `DOMException` [interface wrapper API](https://github.com/jsdom/webidl2js#for-interfaces) generated by [webidl2js](https://github.com/jsdom/webidl2js).
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