| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Parser insertions into a Document that script left non-empty</title> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/parsing.html#the-initial-insertion-mode"> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/parsing.html#the-before-html-insertion-mode"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <body> |
| <script> |
| function openedDocument(t) { |
| const iframe = document.createElement("iframe"); |
| document.body.appendChild(iframe); |
| t.add_cleanup(() => iframe.remove()); |
| const doc = iframe.contentDocument; |
| doc.open(); |
| return doc; |
| } |
| |
| test(t => { |
| const doc = openedDocument(t); |
| doc.write("<!DOCTYPE html>"); |
| assert_equals(doc.doctype?.name, "html", "the parser's doctype was appended"); |
| assert_array_equals([...doc.childNodes], [doc.doctype], |
| "it is the Document's only child"); |
| }, "Baseline: a DOCTYPE token appends a doctype to an empty Document"); |
| |
| test(t => { |
| const doc = openedDocument(t); |
| const doctype = doc.appendChild(doc.implementation.createDocumentType("x", "", "")); |
| doc.write("<!DOCTYPE html>"); |
| assert_array_equals([...doc.childNodes], [doctype], |
| "a Document cannot have two doctype children"); |
| }, "A DOCTYPE token is dropped when the Document already has a doctype child"); |
| |
| test(t => { |
| const doc = openedDocument(t); |
| const element = doc.appendChild(doc.createElement("x")); |
| doc.write("<!DOCTYPE html>"); |
| assert_array_equals([...doc.childNodes], [element], |
| "a doctype cannot follow an element child"); |
| }, "A DOCTYPE token is dropped when the Document already has an element child"); |
| |
| test(t => { |
| const doc = openedDocument(t); |
| const element = doc.appendChild(doc.createElement("x")); |
| doc.write("<html><body>text"); |
| assert_array_equals([...doc.childNodes], [element], |
| "a Document cannot have two element children"); |
| assert_equals(doc.documentElement, element, "the document element is unchanged"); |
| assert_equals(doc.body, null, "the parsed body is not in the Document"); |
| }, "An html start tag is dropped when the Document already has an element child"); |
| </script> |
