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42 lines
1.6 KiB
42 lines
1.6 KiB
2 months ago
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# w3c-xmlserializer
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An XML serializer that follows the [W3C specification](https://w3c.github.io/DOM-Parsing/).
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This package can be used in Node.js, as long as you feed it a DOM node, e.g. one produced by [jsdom](https://github.com/jsdom/jsdom).
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## Basic usage
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Assume you have a DOM tree rooted at a node `node`. In Node.js, you could create this using [jsdom](https://github.com/jsdom/jsdom) as follows:
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```js
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const { JSDOM } = require("jsdom");
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const { document } = new JSDOM().window;
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const node = document.createElement("akomaNtoso");
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```
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Then, you use this package as follows:
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```js
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const serialize = require("w3c-xmlserializer");
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console.log(serialize(node));
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// => '<akomantoso xmlns="http://www.w3.org/1999/xhtml"></akomantoso>'
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```
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## `requireWellFormed` option
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By default the input DOM tree is not required to be "well-formed"; any given input will serialize to some output string. You can instead require well-formedness via
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```js
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serialize(node, { requireWellFormed: true });
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```
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which will cause `Error`s to be thrown when non-well-formed constructs are encountered. [Per the spec](https://w3c.github.io/DOM-Parsing/#dfn-require-well-formed), this largely is about imposing constraints on the names of elements, attributes, etc.
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As a point of reference, on the web platform:
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* The [`innerHTML` getter](https://w3c.github.io/DOM-Parsing/#dom-innerhtml-innerhtml) uses the require-well-formed mode, i.e. trying to get the `innerHTML` of non-well-formed subtrees will throw.
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* The [`xhr.send()` method](https://xhr.spec.whatwg.org/#the-send()-method) does not require well-formedness, i.e. sending non-well-formed `Document`s will serialize and send them anyway.
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