{ "abandonedHeadElementChild": { "reason": "Unexpected metadata element after head", "description": "Unexpected element after head. Expected the element before ``", "url": false }, "abruptClosingOfEmptyComment": { "reason": "Unexpected abruptly closed empty comment", "description": "Unexpected `>` or `->`. Expected `-->` to close comments" }, "abruptDoctypePublicIdentifier": { "reason": "Unexpected abruptly closed public identifier", "description": "Unexpected `>`. Expected a closing `\"` or `'` after the public identifier" }, "abruptDoctypeSystemIdentifier": { "reason": "Unexpected abruptly closed system identifier", "description": "Unexpected `>`. Expected a closing `\"` or `'` after the identifier identifier" }, "absenceOfDigitsInNumericCharacterReference": { "reason": "Unexpected non-digit at start of numeric character reference", "description": "Unexpected `%c`. Expected `[0-9]` for decimal references or `[0-9a-fA-F]` for hexadecimal references" }, "cdataInHtmlContent": { "reason": "Unexpected CDATA section in HTML", "description": "Unexpected `` in ``", "description": "Unexpected text character `%c`. Only use text in `

` in `<head>`", "description": "Unexpected `<noscript>`. Expected a closing tag or a meta element", "url": false }, "nonConformingDoctype": { "reason": "Unexpected non-conforming doctype declaration", "description": "Expected `<!doctype html>` or `<!doctype html system \"about:legacy-compat\">`", "url": false }, "nonVoidHtmlElementStartTagWithTrailingSolidus": { "reason": "Unexpected trailing slash on start tag of non-void element", "description": "Unexpected `/`. Expected `>` instead" }, "noncharacterCharacterReference": { "reason": "Unexpected noncharacter code point referenced by character reference", "description": "Unexpected code point. Do not use noncharacters in HTML" }, "noncharacterInInputStream": { "reason": "Unexpected noncharacter character", "description": "Unexpected code point `%x`. Do not use noncharacters in HTML" }, "nullCharacterReference": { "reason": "Unexpected NULL character referenced by character reference", "description": "Unexpected code point. Do not use NULL characters in HTML" }, "openElementsLeftAfterEof": { "reason": "Unexpected end of file", "description": "Unexpected end of file. Expected closing tag instead", "url": false }, "surrogateCharacterReference": { "reason": "Unexpected surrogate character referenced by character reference", "description": "Unexpected code point. Do not use lone surrogate characters in HTML" }, "surrogateInInputStream": { "reason": "Unexpected surrogate character", "description": "Unexpected code point `%x`. Do not use lone surrogate characters in HTML" }, "unexpectedCharacterAfterDoctypeSystemIdentifier": { "reason": "Invalid character after system identifier in doctype", "description": "Unexpected character at `%c`. Expected `>`" }, "unexpectedCharacterInAttributeName": { "reason": "Unexpected character in attribute name", "description": "Unexpected `%c`. Expected whitespace, `/`, `>`, `=`, or probably an ASCII letter" }, "unexpectedCharacterInUnquotedAttributeValue": { "reason": "Unexpected character in unquoted attribute value", "description": "Unexpected `%c`. Quote the attribute value to include it" }, "unexpectedEqualsSignBeforeAttributeName": { "reason": "Unexpected equals sign before attribute name ", "description": "Unexpected `%c`. Add an attribute name before it" }, "unexpectedNullCharacter": { "reason": "Unexpected NULL character", "description": "Unexpected code point `%x`. Do not use NULL characters in HTML" }, "unexpectedQuestionMarkInsteadOfTagName": { "reason": "Unexpected question mark instead of tag name", "description": "Unexpected `%c`. Expected an ASCII letter instead" }, "unexpectedSolidusInTag": { "reason": "Unexpected slash in tag", "description": "Unexpected `%c-1`. Expected it followed by `>` or in a quoted attribute value" }, "unknownNamedCharacterReference": { "reason": "Unexpected unknown named character reference", "description": "Unexpected character reference. Expected known named character references" } }