attributes-namednodemap-cross-document.window.js

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This WPT test may be referenced by the following Test IDs:
- /dom/nodes/attributes-namednodemap-cross-document.window.html - WPT Dashboard Interop Dashboard

"use strict";

test(() => {

  const element = document.createElement("div");

  element.setAttribute("x", "first");

  const attribute = element.attributes[0];

  assert_equals(attribute.ownerDocument, document);

  const otherDocument = new Document();

  const otherElement = otherDocument.createElement("other");

  assert_throws_dom("InUseAttributeError", () => otherElement.attributes.setNamedItem(attribute));

  element.removeAttribute("x");

  otherElement.attributes.setNamedItem(attribute);

  assert_equals(attribute.ownerDocument, otherDocument);

}, "Moving an attribute between documents");

test(() => {

  const element = document.createElement("div");

  element.setAttribute("x", "first");

  const attribute = element.attributes[0];

  element.removeAttribute("x");

  const otherDocument = new Document();

  const otherElement = otherDocument.createElement("other");

  otherElement.setAttribute("x", "second");

  otherElement.attributes.setNamedItem(attribute);

  assert_equals(attribute.ownerDocument, otherDocument);

  assert_equals(otherElement.getAttribute("x"), "first");

}, "Replacing an attribute across documents");