The XMLSerializer interface provides the serializeToString() method to construct an XML string representing a DOM tree.



Creates a new XMLSerializer object.

Instance methods


Returns the serialized subtree of a string.


Serializing XML into a string

This example just serializes an entire document into a string containing XML.

const s = new XMLSerializer();
const str = s.serializeToString(document);

This involves creating a new XMLSerializer object, then passing the Document to be serialized into serializeToString(), which returns the XML equivalent of the document. saveXML() represents a function that would then save the serialized string.

Inserting nodes into a DOM based on XML

This example uses the Element.insertAdjacentHTML() method to insert a new DOM Node into the body of the Document, based on XML created by serializing an Element object.

Note: In the real world, you should usually instead call importNode() method to import the new node into the DOM, then call one of the following methods to add the node to the DOM tree:

Because insertAdjacentHTML() accepts a string and not a Node as its second parameter, XMLSerializer is used to first convert the node into a string.

const inp = document.createElement("input");
const XMLS = new XMLSerializer();
const inp_xmls = XMLS.serializeToString(inp); // First convert DOM node into a string

// Insert the newly created node into the document's body
document.body.insertAdjacentHTML("afterbegin", inp_xmls);

The code creates a new <input> element by calling Document.createElement(), then serializes it into XML using serializeToString().

Once that's done, insertAdjacentHTML() is used to insert the <input> element into the DOM.


DOM Parsing and Serialization
# the-xmlserializer-interface

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See also