preset.html-standard.json

{
	"rules": {
		/**
		 * No duplicate attr
		 *
		 * The parser ignores all such duplicate occurrences of the attribute.
		 *
		 * @see https://html.spec.whatwg.org/multipage/parsing.html#parse-error-duplicate-attribute
		 */
		"attr-duplication": true,

		/**
		 * No use deprecated attr
		 *
		 * You should not use deprecated attributes from the viewpoint of compatibility.
		 */
		"deprecated-attr": true,

		/**
		 * No use deprecated element
		 *
		 * You should not use deprecated elements from the viewpoint of compatibility.
		 */
		"deprecated-element": true,

		/**
		 * Require `doctype`
		 *
		 * It has the effect of avoiding quirks mode.
		 *
		 * @see https://html.spec.whatwg.org/multipage/syntax.html#syntax-doctype
		 */
		"doctype": true,

		/**
		 * Must not skip heading levels
		 *
		 */
		"heading-levels": true,

		/**
		 * Must not duplicate **ID**
		 *
		 */
		"id-duplication": true,

		/**
		 * No use ineffective attr
		 *
		 */
		"ineffective-attr": true,

		/**
		 * No duplicate names in `<dl>`
		 *
		 * Within a single dl element, there should not be more than one dt element for each name.
		 *
		 * @see https://html.spec.whatwg.org/multipage/grouping-content.html#the-dl-element:~:text=Within%20a%20single%20dl%20element%2C%20there%20should%20not%20be%20more%20than%20one%20dt%20element%20for%20each%20name
		 *
		 */
		"no-duplicate-dt": true,

		/**
		 * No refer to no existent **ID**
		 */
		"no-refer-to-non-existent-id": true,

		/**
		 * No use **orphaned end tag**
		 *
		 */
		"no-orphaned-end-tag": true,

		/**
		 * Allow only **permitted contents**
		 *
		 */
		"permitted-contents": true,

		/**
		 * Need **placeholder label option**
		 *
		 */
		"placeholder-label-option": true,

		/**
		 * Require the `datetime` attribute if the content of the `time` element is invalid
		 *
		 */
		"require-datetime": true,

		/**
		 * Specify required attr
		 *
		 */
		"required-attr": true
	},
	"nodeRules": [
		{
			/**
			 * Specify `charset=UTF-8`
			 *
			 * @see https://html.spec.whatwg.org/multipage/semantics.html#charset
			 */
			"selector": ":where(head)",
			"rules": {
				"required-element": ["meta[charset=\"UTF-8\" i]"]
			}
		},
		{
			/**
			 * No use `<small>` as **subheadings**
			 *
			 * Should not use it in `<h1>`, `<h2>`, `<h3>`, `<h4>`, `<h5>`, and `<h6>`.
			 *
			 * @see https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-small-element
			 */
			"selector": "h1, h2, h3, h4, h5, h6",
			"rules": {
				"disallowed-element": {
					"value": ["small"],
					"reason": "The small element must not be used for subheadings. https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-small-element"
				}
			}
		},
		{
			/**
			 * No use `<caption>` within `<figure>`
			 *
			 * When `<table>` is the only content in `<figure>` other than `<figcaption>`, `<caption>` should be omitted in favor of `<figcaption>`.
			 *
			 * @see https://html.spec.whatwg.org/multipage/tables.html#the-caption-element
			 */
			"selector": ":where(figcaption ~ table, table:has(~ figcaption))",
			"rules": {
				"disallowed-element": {
					"value": ["caption"],
					"reason": "When a table element is the only content in a figure element other than the figcaption, the caption element should be omitted in favor of the figcaption. (https://html.spec.whatwg.org/multipage/tables.html#the-caption-element)"
				},
				"require-accessible-name": false
			}
		},
		{
			/**
			 * Require `title` attr in `<input pattern>`
			 *
			 * When an `<input>` element has a `pattern` attribute specified, authors should include a `title` attribute to give a description of the pattern.
			 *
			 * @see https://html.spec.whatwg.org/multipage/grouping-content.html#the-figure-element
			 */
			"selector": ":where(input[pattern])",
			"rules": {
				"required-attr": {
					"value": [{ "name": "title" }]
				}
			}
		},
		{
			/**
			 * No nested same `<details>` name group
			 */
			"regexSelector": {
				"nodeName": "details",
				"attrName": "name",
				"attrValue": "^(?<value>.+)$",
				"combination": {
					"combinator": " ",
					"nodeName": "details"
				}
			},
			"rules": {
				"invalid-attr": {
					"options": {
						"disallowAttrs": {
							"name": {
								"pattern": "{{ value }}"
							}
						}
					},
					"reason": "A document must not contain a details element that is a descendant of another details element in the same details name group."
				}
			}
		}
	]
}