scope-selector.html

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This WPT test may be referenced by the following Test IDs:
- /css/selectors/scope-selector.html - WPT Dashboard Interop Dashboard

<!doctype html>

<link rel='help' href='https://drafts.csswg.org/selectors-4/#the-scope-pseudo'>

<meta name='description' content=':scope should match when context object is a ShadowRoot or a DocumentFragment'>

<script src='/resources/testharness.js'></script>

<script src='/resources/testharnessreport.js'></script>

<div id='shadowHost'></div>

<script>

'use strict'

const shadowHost = document.getElementById("shadowHost");

const shadowRoot = shadowHost.attachShadow({mode:'open'})

shadowRoot.appendChild(document.createElement("div"));

test (() => {

  assert_equals(shadowRoot.querySelectorAll(':scope > div').length, 0, 'should not match in shadow root');

});

const documentFragment = document.createDocumentFragment();

documentFragment.appendChild(document.createElement("div"));

test(() => {

  assert_equals(documentFragment.querySelectorAll(':scope > div').length, 0, 'should not match in document fragment');

});

test(() => {

  assert_equals(shadowRoot.firstChild.querySelector(':scope'), null, 'should return null');

  assert_equals(shadowRoot.firstChild.querySelectorAll(':scope').length, 0, 'should return 0');

  assert_equals(shadowRoot.querySelector(':scope'), null, 'should return null');

  assert_equals(shadowRoot.querySelectorAll(':scope').length, 0, 'should return 0');

  assert_equals(documentFragment.querySelector(':scope'), null, 'should return null');

  assert_equals(documentFragment.querySelectorAll(':scope').length, 0, 'should return 0');

  assert_equals(document.querySelector(':scope'), document.documentElement, 'should return the document element');

  assert_equals(document.querySelectorAll(':scope').length, 1, 'should return 1');

}, 'querySelector() with ":scope" should return the document element, if present in the subtree');

</script>