linthtml.config.js

const svgCamelCaseTags = [
  'clipPath', 'textPath', 'linearGradient', 'radialGradient', 'foreignObject',
  'feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix',
  'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feDropShadow', 'feFlood',
  'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge',
  'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting',
  'feSpotLight', 'feTile', 'feTurbulence', 'animateTransform', 'animateMotion',
];

const svgCamelCaseAttributes = [
  'viewBox', 'preserveAspectRatio', 'xlink:href', 'xmlns:xlink',
  'gradientTransform', 'gradientUnits', 'patternTransform', 'patternUnits', 'patternContentUnits',
  'markerWidth', 'markerHeight', 'markerUnits', 'refX', 'refY',
  'clipPathUnits', 'maskUnits', 'maskContentUnits',
  'attributeName', 'attributeType', 'repeatCount', 'repeatDur', 'textLength', 'lengthAdjust',
  'stdDeviation', 'baseFrequency', 'numOctaves', 'stitchTiles', 'surfaceScale',
  'kernelMatrix', 'kernelUnitLength', 'edgeMode', 'specularConstant', 'specularExponent',
  'pointsAtX', 'pointsAtY', 'pointsAtZ', 'pathLength', 'startOffset', 'tableValues',
  'spreadMethod', 'primitiveUnits', 'filterUnits',
];

const allowedInputTypes = [
  'button', 'checkbox', 'color', 'date', 'datetime-local', 'email', 'file',
  'hidden', 'image', 'month', 'number', 'password', 'radio', 'range', 'reset',
  'search', 'submit', 'tel', 'text', 'time', 'url', 'week',
];

export default {
  'plugins': ['linthtml-rules-htmlacademy'],
  'attr-name-ignore-regex': `^(${svgCamelCaseAttributes.join('|')})$`,
  'rules': {
    'htmlacademy/a-target-rel': true,
    'htmlacademy/aria-label-misuse': true,
    'htmlacademy/attr-delimiter': true,
    'htmlacademy/attr-order': true,
    'htmlacademy/attr-req-value': [true, {ignore: ['alt']}],
    'htmlacademy/attribute-allowed-values': [true, {
      input: {attributes: {type: {enum: allowedInputTypes}}},
    }],
    'htmlacademy/ban-url-spaces': true,
    'htmlacademy/boolean-attr-no-value': true,
    'htmlacademy/charset-position': true,
    'htmlacademy/form-action-attribute': true,
    'htmlacademy/head-meta-charset': true,
    'htmlacademy/heading-level': true,
    'htmlacademy/icon-button-aria-label': true,
    'htmlacademy/id-no-dup': true,
    'htmlacademy/input-name-unique': true,
    'htmlacademy/input-req-label': true,
    'htmlacademy/label-req-for': true,
    'htmlacademy/label-req-text': true,
    'htmlacademy/link-req-content': true,
    'htmlacademy/no-blocking-script': true,
    'htmlacademy/no-double-br': true,
    'htmlacademy/no-px-size': true,
    'htmlacademy/replaced-elements-req-dimensions': true,
    'htmlacademy/req-charset-utf': true,
    'htmlacademy/req-head-styles': true,
    'htmlacademy/req-mailto': true,
    'htmlacademy/req-meta-viewport': true,
    'htmlacademy/req-preload-font': true,
    'htmlacademy/req-single-styles': true,
    'htmlacademy/req-source-width-height': true,
    'htmlacademy/req-stylesheet-link': true,
    'htmlacademy/req-submit-button': true,
    'htmlacademy/req-tags-presence': [true, ['h1', 'main']],
    'htmlacademy/req-webp-in-picture': true,
    'htmlacademy/section-has-heading': true,
    'htmlacademy/space-between-comments': [true, 'space'],
    'htmlacademy/svg-role-img': true,
    'htmlacademy/tag-forbid-attr': [true, {
      link: [{name: 'type', value: 'text/css'}],
      script: [{name: 'type', value: 'text/javascript'}],
    }],
    'htmlacademy/tag-name-lowercase': [true, {ignore: svgCamelCaseTags}],
    'htmlacademy/tag-req-attr': [true, {
      a: [{name: 'href'}],
      button: [{name: 'type'}],
      form: [{name: 'method'}],
      input: [{name: 'name', ignore: {type: 'submit'}}],
      select: [{name: 'name'}],
      source: [{name: 'type'}],
      textarea: [{name: 'name'}],
      time: [{name: 'datetime'}],
    }],
    'htmlacademy/tag-self-close': [true, 'never'],

    'attr-name-style': [true, 'dash'],
    'attr-no-dup': true,
    'attr-no-unsafe-char': true,
    'attr-quote-style': [true, 'double'],
    'attr-validate': true,
    'class-no-dup': true,
    'doctype-first': true,
    'doctype-html5': true,
    'fieldset-contains-legend': true,
    'fig-req-figcaption': true,
    'focusable-tabindex-style': true,
    'head-req-title': true,
    'head-valid-content-model': true,
    'html-req-lang': true,
    'html-valid-content-model': true,
    'id-style': [true, 'dash'],
    'img-req-alt': [true, 'allownull'],
    'img-req-src': true,
    'input-btn-req-value-or-title': true,
    'input-radio-req-name': true,
    'label-no-enc-textarea-or-select': true,
    'lang-style': [true, 'case'],
    'no-surrounding-whitespace': true,
    'tag-bans': [true, 'style'],
    'tag-close': true,
    'tag-name-match': true,
    'title-no-dup': true,
  },
};