| <!DOCTYPE html> |
| <body> |
| <input type="range"> |
| <script src="../../../resources/js-test.js"></script> |
| <script> |
| description('Test that MutationObservers operate in Shadow DOM'); |
| |
| function doTest() |
| { |
| function mutate(elt) |
| { |
| elt.setAttribute('data-foo', 'bar'); |
| elt.insertBefore(document.createTextNode('hello'), elt.firstChild); |
| elt.firstChild.textContent = 'goodbye'; |
| elt.removeChild(elt.firstChild); |
| } |
| |
| var shadowRoot = internals.shadowRoot(document.querySelector('input')); |
| var observer = new MutationObserver(function() { }); |
| |
| observer.observe(shadowRoot.firstChild, {attributes: true, childList: true, characterData: true, subtree: true}); |
| mutate(shadowRoot.firstChild); |
| |
| window.mutations = observer.takeRecords(); |
| debug('Mutations in shadow DOM should have been observed:'); |
| shouldBe('mutations.length', '4'); |
| shouldBe('mutations[0].type', '"attributes"'); |
| shouldBe('mutations[1].type', '"childList"'); |
| shouldBe('mutations[2].type', '"characterData"'); |
| shouldBe('mutations[3].type', '"childList"'); |
| observer.disconnect(); |
| |
| window.mutations = observer.takeRecords(); |
| observer.observe(document, {attributes: true, childList: true, characterData: true, subtree: true}); |
| mutate(shadowRoot.firstChild); |
| debug('\nObserving from outside shadow DOM should not see mutations in the shadow:'); |
| shouldBe('mutations.length', '0'); |
| } |
| |
| if (window.internals) |
| doTest(); |
| else |
| testFailed('This test only runs in DRT'); |
| </script> |
| </body> |
