{ "$schema": "http://json-schema.org/draft-04/schema#", "id": "https://json.schemastore.org/htmlhint.json", "properties": { "alt-require": { "description": "Alt of img must be present and alt of area[href] and input[type=image] must be set value.", "type": "boolean", "default": false }, "attr-lowercase": { "description": "Attribute name must be lowercase.", "anyOf": [ { "type": "boolean" }, { "type": "array", "items": { "type": "string" } } ], "default": false }, "attr-no-duplication": { "description": "The same attribute can't be specified twice.", "type": "boolean", "default": false }, "attr-sorted": { "description": "Attributes should be sorted in an order.", "type": "boolean", "default": false }, "attr-unsafe-chars": { "description": "Attribute value cannot use unsafe chars.", "type": "boolean", "default": false }, "attr-value-double-quotes": { "description": "Attribute value must be closed by double quotes.", "type": "boolean", "default": false }, "attr-value-no-duplication": { "description": "Class attributes should not contain duplicate values. Other attributes can be checked via configuration.", "anyOf": [ { "type": "boolean" }, { "type": "array", "items": { "type": "string" } } ], "default": false }, "attr-value-not-empty": { "description": "Attribute must set value.", "type": "boolean", "default": false }, "attr-value-single-quotes": { "description": "Attribute value must be closed by single quotes.", "type": "boolean", "default": false }, "attr-whitespace": { "description": "No leading or trailing spaces inside attribute values.", "type": "boolean", "default": false }, "button-type-require": { "description": "The type attribute of a button element must be present with a valid value: button, submit, or reset.", "type": "boolean", "default": false }, "doctype-first": { "description": "Doctype must be first.", "type": "boolean", "default": false }, "doctype-html5": { "description": "Doctype must be HTML5.", "type": "boolean", "default": false }, "frame-title-require": { "description": "A frame or iframe element must have an accessible name.", "type": "boolean", "default": false }, "form-method-require": { "description": "The method attribute of a form element must be present.", "type": "boolean", "default": false }, "h1-require": { "description": "A H1 heading element is required in HTML documents.", "type": "boolean", "default": false }, "head-script-disabled": { "description": "The script tag cannot be used in head.", "default": false, "enum": [false, true, "allow-non-blocking"] }, "href-abs-or-rel": { "description": "Href must be absolute or relative.", "default": false, "enum": [false, "abs", "rel"] }, "html-lang-require": { "description": "The lang attribute of an element must be present and should be valid.", "type": "boolean", "default": false }, "id-class-ad-disabled": { "description": "Id and class cannot use ad keyword, it will be blocked by adblock software.", "type": "boolean", "default": false }, "id-class-value": { "description": "Id and class value must meet some rules: underline, dash, hump.", "default": false, "enum": [false, "underline", "dash", "hump"] }, "id-unique": { "description": "ID attributes must be unique in the document.", "type": "boolean", "default": false }, "inline-script-disabled": { "description": "Inline script cannot be used.", "type": "boolean", "default": false }, "inline-style-disabled": { "description": "Inline style cannot be used.", "type": "boolean", "default": false }, "link-rel-canonical-require": { "description": "A link element with rel=\"canonical\" is required within the tag.", "type": "boolean", "default": false }, "main-require": { "description": "A main element is required within the tag.", "type": "boolean", "default": false }, "meta-charset-require": { "description": "A meta charset is required within the tag.", "type": "boolean", "default": false }, "meta-description-require": { "description": "A meta description is required within the tag.", "type": "boolean", "default": false }, "meta-viewport-require": { "description": "A meta viewport is required within the tag.", "type": "boolean", "default": false }, "space-tab-mixed-disabled": { "description": "Spaces and tabs cannot be mixed in front of line.", "default": false, "enum": [false, "space", "tab"] }, "spec-char-escape": { "description": "Special characters must be escaped.", "type": "boolean", "default": false }, "src-not-empty": { "description": "Src of img(script,link) must set value. Empty of src will visit current page twice.", "type": "boolean", "default": false }, "style-disabled": { "description": "Style tag cannot be used.", "type": "boolean", "default": false }, "tag-no-obsolete": { "description": "Disallows the use of obsolete HTML tags.", "type": "boolean", "default": false }, "tag-pair": { "description": "Tag must be paired.", "type": "boolean", "default": false }, "tag-self-close": { "description": "The empty tag must be self-closed.", "type": "boolean", "default": false }, "tagname-lowercase": { "description": "Tagname must be lowercase.", "type": "boolean", "default": false }, "tagname-specialchars": { "description": "Tagname must not contain any characters beside letters, numbers, ”-”, ”:” or ”_”.", "type": "boolean", "default": false }, "tags-check": { "description": "Check if particular tags are self-closing or must include or exclude particular tags.", "type": "boolean", "default": false }, "title-require": { "description": "title must be present in head tag.", "type": "boolean", "default": false } }, "title": "JSON schema for HTMLHint configuration files", "type": "object" }