"use strict";
  
  const produceXMLSerialization = require("w3c-xmlserializer");
  const parse5 = require("parse5");
  const DOMException = require("domexception/webidl2js-wrapper");
  
  const utils = require("../generated/utils");
  const treeAdapter = require("./parse5-adapter-serialization");
  const NODE_TYPE = require("../node-type");
  const NAMESPACES = require("../helpers/namespaces");
  
  function htmlSerialization(node) {
    if (
      node.nodeType === NODE_TYPE.ELEMENT_NODE &&
      node.namespaceURI === NAMESPACES.HTML_NS &&
      node.tagName === "TEMPLATE"
    ) {
      node = node.content;
    }
  
    return parse5.serialize(node, { treeAdapter });
  }
  
  module.exports.fragmentSerialization = (node, { requireWellFormed, globalObject }) => {
    const contextDocument =
      node.nodeType === NODE_TYPE.DOCUMENT_NODE ? node : node._ownerDocument;
    if (contextDocument._parsingMode === "html") {
      return htmlSerialization(node);
    }
  
    const childNodes = node.childNodesForSerializing || node.childNodes;
  
    try {
      let serialized = "";
      for (let i = 0; i < childNodes.length; ++i) {
        serialized += produceXMLSerialization(
          utils.wrapperForImpl(childNodes[i] || childNodes.item(i)),
          { requireWellFormed }
        );
      }
      return serialized;
    } catch (e) {
      throw DOMException.create(globalObject, [e.message, "InvalidStateError"]);
    }
  };