rehype-table-merge/lib/cjs/index.cjs

A rehype plugin for merging cells of table elements.

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

/**
 * @typedef {import('./info.js').Info} Info
 * @typedef {Record<string, Info>} Properties
 * @typedef {Record<string, string>} Normal
 */

class Schema {
  /**
   * @constructor
   * @param {Properties} property
   * @param {Normal} normal
   * @param {string} [space]
   */
  constructor(property, normal, space) {
    this.property = property;
    this.normal = normal;
    if (space) {
      this.space = space;
    }
  }
}

/** @type {Properties} */
Schema.prototype.property = {};
/** @type {Normal} */
Schema.prototype.normal = {};
/** @type {string|null} */
Schema.prototype.space = null;

/**
 * @typedef {import('./schema.js').Properties} Properties
 * @typedef {import('./schema.js').Normal} Normal
 */

/**
 * @param {Schema[]} definitions
 * @param {string} [space]
 * @returns {Schema}
 */
function merge(definitions, space) {
  /** @type {Properties} */
  const property = {};
  /** @type {Normal} */
  const normal = {};
  let index = -1;

  while (++index < definitions.length) {
    Object.assign(property, definitions[index].property);
    Object.assign(normal, definitions[index].normal);
  }

  return new Schema(property, normal, space)
}

/**
 * @param {string} value
 * @returns {string}
 */
function normalize(value) {
  return value.toLowerCase()
}

class Info {
  /**
   * @constructor
   * @param {string} property
   * @param {string} attribute
   */
  constructor(property, attribute) {
    /** @type {string} */
    this.property = property;
    /** @type {string} */
    this.attribute = attribute;
  }
}

/** @type {string|null} */
Info.prototype.space = null;
Info.prototype.boolean = false;
Info.prototype.booleanish = false;
Info.prototype.overloadedBoolean = false;
Info.prototype.number = false;
Info.prototype.commaSeparated = false;
Info.prototype.spaceSeparated = false;
Info.prototype.commaOrSpaceSeparated = false;
Info.prototype.mustUseProperty = false;
Info.prototype.defined = false;

let powers = 0;

const boolean = increment();
const booleanish = increment();
const overloadedBoolean = increment();
const number = increment();
const spaceSeparated = increment();
const commaSeparated = increment();
const commaOrSpaceSeparated = increment();

function increment() {
  return 2 ** ++powers
}

var types = /*#__PURE__*/Object.freeze({
  __proto__: null,
  boolean: boolean,
  booleanish: booleanish,
  overloadedBoolean: overloadedBoolean,
  number: number,
  spaceSeparated: spaceSeparated,
  commaSeparated: commaSeparated,
  commaOrSpaceSeparated: commaOrSpaceSeparated
});

/** @type {Array<keyof types>} */
// @ts-expect-error: hush.
const checks = Object.keys(types);

class DefinedInfo extends Info {
  /**
   * @constructor
   * @param {string} property
   * @param {string} attribute
   * @param {number|null} [mask]
   * @param {string} [space]
   */
  constructor(property, attribute, mask, space) {
    let index = -1;

    super(property, attribute);

    mark(this, 'space', space);

    if (typeof mask === 'number') {
      while (++index < checks.length) {
        const check = checks[index];
        mark(this, checks[index], (mask & types[check]) === types[check]);
      }
    }
  }
}

DefinedInfo.prototype.defined = true;

/**
 * @param {DefinedInfo} values
 * @param {string} key
 * @param {unknown} value
 */
function mark(values, key, value) {
  if (value) {
    // @ts-expect-error: assume `value` matches the expected value of `key`.
    values[key] = value;
  }
}

/**
 * @typedef {import('./schema.js').Properties} Properties
 * @typedef {import('./schema.js').Normal} Normal
 *
 * @typedef {Record<string, string>} Attributes
 *
 * @typedef {Object} Definition
 * @property {Record<string, number|null>} properties
 * @property {(attributes: Attributes, property: string) => string} transform
 * @property {string} [space]
 * @property {Attributes} [attributes]
 * @property {Array<string>} [mustUseProperty]
 */

const own$3 = {}.hasOwnProperty;

/**
 * @param {Definition} definition
 * @returns {Schema}
 */
function create(definition) {
  /** @type {Properties} */
  const property = {};
  /** @type {Normal} */
  const normal = {};
  /** @type {string} */
  let prop;

  for (prop in definition.properties) {
    if (own$3.call(definition.properties, prop)) {
      const value = definition.properties[prop];
      const info = new DefinedInfo(
        prop,
        definition.transform(definition.attributes || {}, prop),
        value,
        definition.space
      );

      if (
        definition.mustUseProperty &&
        definition.mustUseProperty.includes(prop)
      ) {
        info.mustUseProperty = true;
      }

      property[prop] = info;

      normal[normalize(prop)] = prop;
      normal[normalize(info.attribute)] = prop;
    }
  }

  return new Schema(property, normal, definition.space)
}

const xlink = create({
  space: 'xlink',
  transform(_, prop) {
    return 'xlink:' + prop.slice(5).toLowerCase()
  },
  properties: {
    xLinkActuate: null,
    xLinkArcRole: null,
    xLinkHref: null,
    xLinkRole: null,
    xLinkShow: null,
    xLinkTitle: null,
    xLinkType: null
  }
});

const xml = create({
  space: 'xml',
  transform(_, prop) {
    return 'xml:' + prop.slice(3).toLowerCase()
  },
  properties: {xmlLang: null, xmlBase: null, xmlSpace: null}
});

/**
 * @param {Record<string, string>} attributes
 * @param {string} attribute
 * @returns {string}
 */
function caseSensitiveTransform(attributes, attribute) {
  return attribute in attributes ? attributes[attribute] : attribute
}

/**
 * @param {Record<string, string>} attributes
 * @param {string} property
 * @returns {string}
 */
function caseInsensitiveTransform(attributes, property) {
  return caseSensitiveTransform(attributes, property.toLowerCase())
}

const xmlns = create({
  space: 'xmlns',
  attributes: {xmlnsxlink: 'xmlns:xlink'},
  transform: caseInsensitiveTransform,
  properties: {xmlns: null, xmlnsXLink: null}
});

const aria = create({
  transform(_, prop) {
    return prop === 'role' ? prop : 'aria-' + prop.slice(4).toLowerCase()
  },
  properties: {
    ariaActiveDescendant: null,
    ariaAtomic: booleanish,
    ariaAutoComplete: null,
    ariaBusy: booleanish,
    ariaChecked: booleanish,
    ariaColCount: number,
    ariaColIndex: number,
    ariaColSpan: number,
    ariaControls: spaceSeparated,
    ariaCurrent: null,
    ariaDescribedBy: spaceSeparated,
    ariaDetails: null,
    ariaDisabled: booleanish,
    ariaDropEffect: spaceSeparated,
    ariaErrorMessage: null,
    ariaExpanded: booleanish,
    ariaFlowTo: spaceSeparated,
    ariaGrabbed: booleanish,
    ariaHasPopup: null,
    ariaHidden: booleanish,
    ariaInvalid: null,
    ariaKeyShortcuts: null,
    ariaLabel: null,
    ariaLabelledBy: spaceSeparated,
    ariaLevel: number,
    ariaLive: null,
    ariaModal: booleanish,
    ariaMultiLine: booleanish,
    ariaMultiSelectable: booleanish,
    ariaOrientation: null,
    ariaOwns: spaceSeparated,
    ariaPlaceholder: null,
    ariaPosInSet: number,
    ariaPressed: booleanish,
    ariaReadOnly: booleanish,
    ariaRelevant: null,
    ariaRequired: booleanish,
    ariaRoleDescription: spaceSeparated,
    ariaRowCount: number,
    ariaRowIndex: number,
    ariaRowSpan: number,
    ariaSelected: booleanish,
    ariaSetSize: number,
    ariaSort: null,
    ariaValueMax: number,
    ariaValueMin: number,
    ariaValueNow: number,
    ariaValueText: null,
    role: null
  }
});

const html$1 = create({
  space: 'html',
  attributes: {
    acceptcharset: 'accept-charset',
    classname: 'class',
    htmlfor: 'for',
    httpequiv: 'http-equiv'
  },
  transform: caseInsensitiveTransform,
  mustUseProperty: ['checked', 'multiple', 'muted', 'selected'],
  properties: {
    // Standard Properties.
    abbr: null,
    accept: commaSeparated,
    acceptCharset: spaceSeparated,
    accessKey: spaceSeparated,
    action: null,
    allow: null,
    allowFullScreen: boolean,
    allowPaymentRequest: boolean,
    allowUserMedia: boolean,
    alt: null,
    as: null,
    async: boolean,
    autoCapitalize: null,
    autoComplete: spaceSeparated,
    autoFocus: boolean,
    autoPlay: boolean,
    capture: boolean,
    charSet: null,
    checked: boolean,
    cite: null,
    className: spaceSeparated,
    cols: number,
    colSpan: null,
    content: null,
    contentEditable: booleanish,
    controls: boolean,
    controlsList: spaceSeparated,
    coords: number | commaSeparated,
    crossOrigin: null,
    data: null,
    dateTime: null,
    decoding: null,
    default: boolean,
    defer: boolean,
    dir: null,
    dirName: null,
    disabled: boolean,
    download: overloadedBoolean,
    draggable: booleanish,
    encType: null,
    enterKeyHint: null,
    form: null,
    formAction: null,
    formEncType: null,
    formMethod: null,
    formNoValidate: boolean,
    formTarget: null,
    headers: spaceSeparated,
    height: number,
    hidden: boolean,
    high: number,
    href: null,
    hrefLang: null,
    htmlFor: spaceSeparated,
    httpEquiv: spaceSeparated,
    id: null,
    imageSizes: null,
    imageSrcSet: null,
    inputMode: null,
    integrity: null,
    is: null,
    isMap: boolean,
    itemId: null,
    itemProp: spaceSeparated,
    itemRef: spaceSeparated,
    itemScope: boolean,
    itemType: spaceSeparated,
    kind: null,
    label: null,
    lang: null,
    language: null,
    list: null,
    loading: null,
    loop: boolean,
    low: number,
    manifest: null,
    max: null,
    maxLength: number,
    media: null,
    method: null,
    min: null,
    minLength: number,
    multiple: boolean,
    muted: boolean,
    name: null,
    nonce: null,
    noModule: boolean,
    noValidate: boolean,
    onAbort: null,
    onAfterPrint: null,
    onAuxClick: null,
    onBeforePrint: null,
    onBeforeUnload: null,
    onBlur: null,
    onCancel: null,
    onCanPlay: null,
    onCanPlayThrough: null,
    onChange: null,
    onClick: null,
    onClose: null,
    onContextLost: null,
    onContextMenu: null,
    onContextRestored: null,
    onCopy: null,
    onCueChange: null,
    onCut: null,
    onDblClick: null,
    onDrag: null,
    onDragEnd: null,
    onDragEnter: null,
    onDragExit: null,
    onDragLeave: null,
    onDragOver: null,
    onDragStart: null,
    onDrop: null,
    onDurationChange: null,
    onEmptied: null,
    onEnded: null,
    onError: null,
    onFocus: null,
    onFormData: null,
    onHashChange: null,
    onInput: null,
    onInvalid: null,
    onKeyDown: null,
    onKeyPress: null,
    onKeyUp: null,
    onLanguageChange: null,
    onLoad: null,
    onLoadedData: null,
    onLoadedMetadata: null,
    onLoadEnd: null,
    onLoadStart: null,
    onMessage: null,
    onMessageError: null,
    onMouseDown: null,
    onMouseEnter: null,
    onMouseLeave: null,
    onMouseMove: null,
    onMouseOut: null,
    onMouseOver: null,
    onMouseUp: null,
    onOffline: null,
    onOnline: null,
    onPageHide: null,
    onPageShow: null,
    onPaste: null,
    onPause: null,
    onPlay: null,
    onPlaying: null,
    onPopState: null,
    onProgress: null,
    onRateChange: null,
    onRejectionHandled: null,
    onReset: null,
    onResize: null,
    onScroll: null,
    onSecurityPolicyViolation: null,
    onSeeked: null,
    onSeeking: null,
    onSelect: null,
    onSlotChange: null,
    onStalled: null,
    onStorage: null,
    onSubmit: null,
    onSuspend: null,
    onTimeUpdate: null,
    onToggle: null,
    onUnhandledRejection: null,
    onUnload: null,
    onVolumeChange: null,
    onWaiting: null,
    onWheel: null,
    open: boolean,
    optimum: number,
    pattern: null,
    ping: spaceSeparated,
    placeholder: null,
    playsInline: boolean,
    poster: null,
    preload: null,
    readOnly: boolean,
    referrerPolicy: null,
    rel: spaceSeparated,
    required: boolean,
    reversed: boolean,
    rows: number,
    rowSpan: number,
    sandbox: spaceSeparated,
    scope: null,
    scoped: boolean,
    seamless: boolean,
    selected: boolean,
    shape: null,
    size: number,
    sizes: null,
    slot: null,
    span: number,
    spellCheck: booleanish,
    src: null,
    srcDoc: null,
    srcLang: null,
    srcSet: null,
    start: number,
    step: null,
    style: null,
    tabIndex: number,
    target: null,
    title: null,
    translate: null,
    type: null,
    typeMustMatch: boolean,
    useMap: null,
    value: booleanish,
    width: number,
    wrap: null,

    // Legacy.
    // See: https://html.spec.whatwg.org/#other-elements,-attributes-and-apis
    align: null, // Several. Use CSS `text-align` instead,
    aLink: null, // `<body>`. Use CSS `a:active {color}` instead
    archive: spaceSeparated, // `<object>`. List of URIs to archives
    axis: null, // `<td>` and `<th>`. Use `scope` on `<th>`
    background: null, // `<body>`. Use CSS `background-image` instead
    bgColor: null, // `<body>` and table elements. Use CSS `background-color` instead
    border: number, // `<table>`. Use CSS `border-width` instead,
    borderColor: null, // `<table>`. Use CSS `border-color` instead,
    bottomMargin: number, // `<body>`
    cellPadding: null, // `<table>`
    cellSpacing: null, // `<table>`
    char: null, // Several table elements. When `align=char`, sets the character to align on
    charOff: null, // Several table elements. When `char`, offsets the alignment
    classId: null, // `<object>`
    clear: null, // `<br>`. Use CSS `clear` instead
    code: null, // `<object>`
    codeBase: null, // `<object>`
    codeType: null, // `<object>`
    color: null, // `<font>` and `<hr>`. Use CSS instead
    compact: boolean, // Lists. Use CSS to reduce space between items instead
    declare: boolean, // `<object>`
    event: null, // `<script>`
    face: null, // `<font>`. Use CSS instead
    frame: null, // `<table>`
    frameBorder: null, // `<iframe>`. Use CSS `border` instead
    hSpace: number, // `<img>` and `<object>`
    leftMargin: number, // `<body>`
    link: null, // `<body>`. Use CSS `a:link {color: *}` instead
    longDesc: null, // `<frame>`, `<iframe>`, and `<img>`. Use an `<a>`
    lowSrc: null, // `<img>`. Use a `<picture>`
    marginHeight: number, // `<body>`
    marginWidth: number, // `<body>`
    noResize: boolean, // `<frame>`
    noHref: boolean, // `<area>`. Use no href instead of an explicit `nohref`
    noShade: boolean, // `<hr>`. Use background-color and height instead of borders
    noWrap: boolean, // `<td>` and `<th>`
    object: null, // `<applet>`
    profile: null, // `<head>`
    prompt: null, // `<isindex>`
    rev: null, // `<link>`
    rightMargin: number, // `<body>`
    rules: null, // `<table>`
    scheme: null, // `<meta>`
    scrolling: booleanish, // `<frame>`. Use overflow in the child context
    standby: null, // `<object>`
    summary: null, // `<table>`
    text: null, // `<body>`. Use CSS `color` instead
    topMargin: number, // `<body>`
    valueType: null, // `<param>`
    version: null, // `<html>`. Use a doctype.
    vAlign: null, // Several. Use CSS `vertical-align` instead
    vLink: null, // `<body>`. Use CSS `a:visited {color}` instead
    vSpace: number, // `<img>` and `<object>`

    // Non-standard Properties.
    allowTransparency: null,
    autoCorrect: null,
    autoSave: null,
    disablePictureInPicture: boolean,
    disableRemotePlayback: boolean,
    prefix: null,
    property: null,
    results: number,
    security: null,
    unselectable: null
  }
});

const svg$1 = create({
  space: 'svg',
  attributes: {
    accentHeight: 'accent-height',
    alignmentBaseline: 'alignment-baseline',
    arabicForm: 'arabic-form',
    baselineShift: 'baseline-shift',
    capHeight: 'cap-height',
    className: 'class',
    clipPath: 'clip-path',
    clipRule: 'clip-rule',
    colorInterpolation: 'color-interpolation',
    colorInterpolationFilters: 'color-interpolation-filters',
    colorProfile: 'color-profile',
    colorRendering: 'color-rendering',
    crossOrigin: 'crossorigin',
    dataType: 'datatype',
    dominantBaseline: 'dominant-baseline',
    enableBackground: 'enable-background',
    fillOpacity: 'fill-opacity',
    fillRule: 'fill-rule',
    floodColor: 'flood-color',
    floodOpacity: 'flood-opacity',
    fontFamily: 'font-family',
    fontSize: 'font-size',
    fontSizeAdjust: 'font-size-adjust',
    fontStretch: 'font-stretch',
    fontStyle: 'font-style',
    fontVariant: 'font-variant',
    fontWeight: 'font-weight',
    glyphName: 'glyph-name',
    glyphOrientationHorizontal: 'glyph-orientation-horizontal',
    glyphOrientationVertical: 'glyph-orientation-vertical',
    hrefLang: 'hreflang',
    horizAdvX: 'horiz-adv-x',
    horizOriginX: 'horiz-origin-x',
    horizOriginY: 'horiz-origin-y',
    imageRendering: 'image-rendering',
    letterSpacing: 'letter-spacing',
    lightingColor: 'lighting-color',
    markerEnd: 'marker-end',
    markerMid: 'marker-mid',
    markerStart: 'marker-start',
    navDown: 'nav-down',
    navDownLeft: 'nav-down-left',
    navDownRight: 'nav-down-right',
    navLeft: 'nav-left',
    navNext: 'nav-next',
    navPrev: 'nav-prev',
    navRight: 'nav-right',
    navUp: 'nav-up',
    navUpLeft: 'nav-up-left',
    navUpRight: 'nav-up-right',
    onAbort: 'onabort',
    onActivate: 'onactivate',
    onAfterPrint: 'onafterprint',
    onBeforePrint: 'onbeforeprint',
    onBegin: 'onbegin',
    onCancel: 'oncancel',
    onCanPlay: 'oncanplay',
    onCanPlayThrough: 'oncanplaythrough',
    onChange: 'onchange',
    onClick: 'onclick',
    onClose: 'onclose',
    onCopy: 'oncopy',
    onCueChange: 'oncuechange',
    onCut: 'oncut',
    onDblClick: 'ondblclick',
    onDrag: 'ondrag',
    onDragEnd: 'ondragend',
    onDragEnter: 'ondragenter',
    onDragExit: 'ondragexit',
    onDragLeave: 'ondragleave',
    onDragOver: 'ondragover',
    onDragStart: 'ondragstart',
    onDrop: 'ondrop',
    onDurationChange: 'ondurationchange',
    onEmptied: 'onemptied',
    onEnd: 'onend',
    onEnded: 'onended',
    onError: 'onerror',
    onFocus: 'onfocus',
    onFocusIn: 'onfocusin',
    onFocusOut: 'onfocusout',
    onHashChange: 'onhashchange',
    onInput: 'oninput',
    onInvalid: 'oninvalid',
    onKeyDown: 'onkeydown',
    onKeyPress: 'onkeypress',
    onKeyUp: 'onkeyup',
    onLoad: 'onload',
    onLoadedData: 'onloadeddata',
    onLoadedMetadata: 'onloadedmetadata',
    onLoadStart: 'onloadstart',
    onMessage: 'onmessage',
    onMouseDown: 'onmousedown',
    onMouseEnter: 'onmouseenter',
    onMouseLeave: 'onmouseleave',
    onMouseMove: 'onmousemove',
    onMouseOut: 'onmouseout',
    onMouseOver: 'onmouseover',
    onMouseUp: 'onmouseup',
    onMouseWheel: 'onmousewheel',
    onOffline: 'onoffline',
    onOnline: 'ononline',
    onPageHide: 'onpagehide',
    onPageShow: 'onpageshow',
    onPaste: 'onpaste',
    onPause: 'onpause',
    onPlay: 'onplay',
    onPlaying: 'onplaying',
    onPopState: 'onpopstate',
    onProgress: 'onprogress',
    onRateChange: 'onratechange',
    onRepeat: 'onrepeat',
    onReset: 'onreset',
    onResize: 'onresize',
    onScroll: 'onscroll',
    onSeeked: 'onseeked',
    onSeeking: 'onseeking',
    onSelect: 'onselect',
    onShow: 'onshow',
    onStalled: 'onstalled',
    onStorage: 'onstorage',
    onSubmit: 'onsubmit',
    onSuspend: 'onsuspend',
    onTimeUpdate: 'ontimeupdate',
    onToggle: 'ontoggle',
    onUnload: 'onunload',
    onVolumeChange: 'onvolumechange',
    onWaiting: 'onwaiting',
    onZoom: 'onzoom',
    overlinePosition: 'overline-position',
    overlineThickness: 'overline-thickness',
    paintOrder: 'paint-order',
    panose1: 'panose-1',
    pointerEvents: 'pointer-events',
    referrerPolicy: 'referrerpolicy',
    renderingIntent: 'rendering-intent',
    shapeRendering: 'shape-rendering',
    stopColor: 'stop-color',
    stopOpacity: 'stop-opacity',
    strikethroughPosition: 'strikethrough-position',
    strikethroughThickness: 'strikethrough-thickness',
    strokeDashArray: 'stroke-dasharray',
    strokeDashOffset: 'stroke-dashoffset',
    strokeLineCap: 'stroke-linecap',
    strokeLineJoin: 'stroke-linejoin',
    strokeMiterLimit: 'stroke-miterlimit',
    strokeOpacity: 'stroke-opacity',
    strokeWidth: 'stroke-width',
    tabIndex: 'tabindex',
    textAnchor: 'text-anchor',
    textDecoration: 'text-decoration',
    textRendering: 'text-rendering',
    typeOf: 'typeof',
    underlinePosition: 'underline-position',
    underlineThickness: 'underline-thickness',
    unicodeBidi: 'unicode-bidi',
    unicodeRange: 'unicode-range',
    unitsPerEm: 'units-per-em',
    vAlphabetic: 'v-alphabetic',
    vHanging: 'v-hanging',
    vIdeographic: 'v-ideographic',
    vMathematical: 'v-mathematical',
    vectorEffect: 'vector-effect',
    vertAdvY: 'vert-adv-y',
    vertOriginX: 'vert-origin-x',
    vertOriginY: 'vert-origin-y',
    wordSpacing: 'word-spacing',
    writingMode: 'writing-mode',
    xHeight: 'x-height',
    // These were camelcased in Tiny. Now lowercased in SVG 2
    playbackOrder: 'playbackorder',
    timelineBegin: 'timelinebegin'
  },
  transform: caseSensitiveTransform,
  properties: {
    about: commaOrSpaceSeparated,
    accentHeight: number,
    accumulate: null,
    additive: null,
    alignmentBaseline: null,
    alphabetic: number,
    amplitude: number,
    arabicForm: null,
    ascent: number,
    attributeName: null,
    attributeType: null,
    azimuth: number,
    bandwidth: null,
    baselineShift: null,
    baseFrequency: null,
    baseProfile: null,
    bbox: null,
    begin: null,
    bias: number,
    by: null,
    calcMode: null,
    capHeight: number,
    className: spaceSeparated,
    clip: null,
    clipPath: null,
    clipPathUnits: null,
    clipRule: null,
    color: null,
    colorInterpolation: null,
    colorInterpolationFilters: null,
    colorProfile: null,
    colorRendering: null,
    content: null,
    contentScriptType: null,
    contentStyleType: null,
    crossOrigin: null,
    cursor: null,
    cx: null,
    cy: null,
    d: null,
    dataType: null,
    defaultAction: null,
    descent: number,
    diffuseConstant: number,
    direction: null,
    display: null,
    dur: null,
    divisor: number,
    dominantBaseline: null,
    download: boolean,
    dx: null,
    dy: null,
    edgeMode: null,
    editable: null,
    elevation: number,
    enableBackground: null,
    end: null,
    event: null,
    exponent: number,
    externalResourcesRequired: null,
    fill: null,
    fillOpacity: number,
    fillRule: null,
    filter: null,
    filterRes: null,
    filterUnits: null,
    floodColor: null,
    floodOpacity: null,
    focusable: null,
    focusHighlight: null,
    fontFamily: null,
    fontSize: null,
    fontSizeAdjust: null,
    fontStretch: null,
    fontStyle: null,
    fontVariant: null,
    fontWeight: null,
    format: null,
    fr: null,
    from: null,
    fx: null,
    fy: null,
    g1: commaSeparated,
    g2: commaSeparated,
    glyphName: commaSeparated,
    glyphOrientationHorizontal: null,
    glyphOrientationVertical: null,
    glyphRef: null,
    gradientTransform: null,
    gradientUnits: null,
    handler: null,
    hanging: number,
    hatchContentUnits: null,
    hatchUnits: null,
    height: null,
    href: null,
    hrefLang: null,
    horizAdvX: number,
    horizOriginX: number,
    horizOriginY: number,
    id: null,
    ideographic: number,
    imageRendering: null,
    initialVisibility: null,
    in: null,
    in2: null,
    intercept: number,
    k: number,
    k1: number,
    k2: number,
    k3: number,
    k4: number,
    kernelMatrix: commaOrSpaceSeparated,
    kernelUnitLength: null,
    keyPoints: null, // SEMI_COLON_SEPARATED
    keySplines: null, // SEMI_COLON_SEPARATED
    keyTimes: null, // SEMI_COLON_SEPARATED
    kerning: null,
    lang: null,
    lengthAdjust: null,
    letterSpacing: null,
    lightingColor: null,
    limitingConeAngle: number,
    local: null,
    markerEnd: null,
    markerMid: null,
    markerStart: null,
    markerHeight: null,
    markerUnits: null,
    markerWidth: null,
    mask: null,
    maskContentUnits: null,
    maskUnits: null,
    mathematical: null,
    max: null,
    media: null,
    mediaCharacterEncoding: null,
    mediaContentEncodings: null,
    mediaSize: number,
    mediaTime: null,
    method: null,
    min: null,
    mode: null,
    name: null,
    navDown: null,
    navDownLeft: null,
    navDownRight: null,
    navLeft: null,
    navNext: null,
    navPrev: null,
    navRight: null,
    navUp: null,
    navUpLeft: null,
    navUpRight: null,
    numOctaves: null,
    observer: null,
    offset: null,
    onAbort: null,
    onActivate: null,
    onAfterPrint: null,
    onBeforePrint: null,
    onBegin: null,
    onCancel: null,
    onCanPlay: null,
    onCanPlayThrough: null,
    onChange: null,
    onClick: null,
    onClose: null,
    onCopy: null,
    onCueChange: null,
    onCut: null,
    onDblClick: null,
    onDrag: null,
    onDragEnd: null,
    onDragEnter: null,
    onDragExit: null,
    onDragLeave: null,
    onDragOver: null,
    onDragStart: null,
    onDrop: null,
    onDurationChange: null,
    onEmptied: null,
    onEnd: null,
    onEnded: null,
    onError: null,
    onFocus: null,
    onFocusIn: null,
    onFocusOut: null,
    onHashChange: null,
    onInput: null,
    onInvalid: null,
    onKeyDown: null,
    onKeyPress: null,
    onKeyUp: null,
    onLoad: null,
    onLoadedData: null,
    onLoadedMetadata: null,
    onLoadStart: null,
    onMessage: null,
    onMouseDown: null,
    onMouseEnter: null,
    onMouseLeave: null,
    onMouseMove: null,
    onMouseOut: null,
    onMouseOver: null,
    onMouseUp: null,
    onMouseWheel: null,
    onOffline: null,
    onOnline: null,
    onPageHide: null,
    onPageShow: null,
    onPaste: null,
    onPause: null,
    onPlay: null,
    onPlaying: null,
    onPopState: null,
    onProgress: null,
    onRateChange: null,
    onRepeat: null,
    onReset: null,
    onResize: null,
    onScroll: null,
    onSeeked: null,
    onSeeking: null,
    onSelect: null,
    onShow: null,
    onStalled: null,
    onStorage: null,
    onSubmit: null,
    onSuspend: null,
    onTimeUpdate: null,
    onToggle: null,
    onUnload: null,
    onVolumeChange: null,
    onWaiting: null,
    onZoom: null,
    opacity: null,
    operator: null,
    order: null,
    orient: null,
    orientation: null,
    origin: null,
    overflow: null,
    overlay: null,
    overlinePosition: number,
    overlineThickness: number,
    paintOrder: null,
    panose1: null,
    path: null,
    pathLength: number,
    patternContentUnits: null,
    patternTransform: null,
    patternUnits: null,
    phase: null,
    ping: spaceSeparated,
    pitch: null,
    playbackOrder: null,
    pointerEvents: null,
    points: null,
    pointsAtX: number,
    pointsAtY: number,
    pointsAtZ: number,
    preserveAlpha: null,
    preserveAspectRatio: null,
    primitiveUnits: null,
    propagate: null,
    property: commaOrSpaceSeparated,
    r: null,
    radius: null,
    referrerPolicy: null,
    refX: null,
    refY: null,
    rel: commaOrSpaceSeparated,
    rev: commaOrSpaceSeparated,
    renderingIntent: null,
    repeatCount: null,
    repeatDur: null,
    requiredExtensions: commaOrSpaceSeparated,
    requiredFeatures: commaOrSpaceSeparated,
    requiredFonts: commaOrSpaceSeparated,
    requiredFormats: commaOrSpaceSeparated,
    resource: null,
    restart: null,
    result: null,
    rotate: null,
    rx: null,
    ry: null,
    scale: null,
    seed: null,
    shapeRendering: null,
    side: null,
    slope: null,
    snapshotTime: null,
    specularConstant: number,
    specularExponent: number,
    spreadMethod: null,
    spacing: null,
    startOffset: null,
    stdDeviation: null,
    stemh: null,
    stemv: null,
    stitchTiles: null,
    stopColor: null,
    stopOpacity: null,
    strikethroughPosition: number,
    strikethroughThickness: number,
    string: null,
    stroke: null,
    strokeDashArray: commaOrSpaceSeparated,
    strokeDashOffset: null,
    strokeLineCap: null,
    strokeLineJoin: null,
    strokeMiterLimit: number,
    strokeOpacity: number,
    strokeWidth: null,
    style: null,
    surfaceScale: number,
    syncBehavior: null,
    syncBehaviorDefault: null,
    syncMaster: null,
    syncTolerance: null,
    syncToleranceDefault: null,
    systemLanguage: commaOrSpaceSeparated,
    tabIndex: number,
    tableValues: null,
    target: null,
    targetX: number,
    targetY: number,
    textAnchor: null,
    textDecoration: null,
    textRendering: null,
    textLength: null,
    timelineBegin: null,
    title: null,
    transformBehavior: null,
    type: null,
    typeOf: commaOrSpaceSeparated,
    to: null,
    transform: null,
    u1: null,
    u2: null,
    underlinePosition: number,
    underlineThickness: number,
    unicode: null,
    unicodeBidi: null,
    unicodeRange: null,
    unitsPerEm: number,
    values: null,
    vAlphabetic: number,
    vMathematical: number,
    vectorEffect: null,
    vHanging: number,
    vIdeographic: number,
    version: null,
    vertAdvY: number,
    vertOriginX: number,
    vertOriginY: number,
    viewBox: null,
    viewTarget: null,
    visibility: null,
    width: null,
    widths: null,
    wordSpacing: null,
    writingMode: null,
    x: null,
    x1: null,
    x2: null,
    xChannelSelector: null,
    xHeight: number,
    y: null,
    y1: null,
    y2: null,
    yChannelSelector: null,
    z: null,
    zoomAndPan: null
  }
});

/**
 * @typedef {import('./util/schema.js').Schema} Schema
 */

const valid = /^data[-\w.:]+$/i;
const dash = /-[a-z]/g;
const cap = /[A-Z]/g;

/**
 * @param {Schema} schema
 * @param {string} value
 * @returns {Info}
 */
function find(schema, value) {
  const normal = normalize(value);
  let prop = value;
  let Type = Info;

  if (normal in schema.normal) {
    return schema.property[schema.normal[normal]]
  }

  if (normal.length > 4 && normal.slice(0, 4) === 'data' && valid.test(value)) {
    // Attribute or property.
    if (value.charAt(4) === '-') {
      // Turn it into a property.
      const rest = value.slice(5).replace(dash, camelcase);
      prop = 'data' + rest.charAt(0).toUpperCase() + rest.slice(1);
    } else {
      // Turn it into an attribute.
      const rest = value.slice(4);

      if (!dash.test(rest)) {
        let dashes = rest.replace(cap, kebab);

        if (dashes.charAt(0) !== '-') {
          dashes = '-' + dashes;
        }

        value = 'data' + dashes;
      }
    }

    Type = DefinedInfo;
  }

  return new Type(prop, value)
}

/**
 * @param {string} $0
 * @returns {string}
 */
function kebab($0) {
  return '-' + $0.toLowerCase()
}

/**
 * @param {string} $0
 * @returns {string}
 */
function camelcase($0) {
  return $0.charAt(1).toUpperCase()
}

/**
 * @typedef {import('./lib/util/info.js').Info} Info
 * @typedef {import('./lib/util/schema.js').Schema} Schema
 */
const html = merge([xml, xlink, xmlns, aria, html$1], 'html');
const svg = merge([xml, xlink, xmlns, aria, svg$1], 'svg');

var own$2 = {}.hasOwnProperty;

/**
 * @callback Handler
 * @param {...unknown} value
 * @return {unknown}
 *
 * @typedef {Record<string, Handler>} Handlers
 *
 * @typedef {Object} Options
 * @property {Handler} [unknown]
 * @property {Handler} [invalid]
 * @property {Handlers} [handlers]
 */

/**
 * Handle values based on a property.
 *
 * @param {string} key
 * @param {Options} [options]
 */
function zwitch(key, options) {
  var settings = options || {};

  /**
   * Handle one value.
   * Based on the bound `key`, a respective handler will be called.
   * If `value` is not an object, or doesn’t have a `key` property, the special
   * “invalid” handler will be called.
   * If `value` has an unknown `key`, the special “unknown” handler will be
   * called.
   *
   * All arguments, and the context object, are passed through to the handler,
   * and it’s result is returned.
   *
   * @param {...unknown} [value]
   * @this {unknown}
   * @returns {unknown}
   * @property {Handler} invalid
   * @property {Handler} unknown
   * @property {Handlers} handlers
   */
  function one(value) {
    var fn = one.invalid;
    var handlers = one.handlers;

    if (value && own$2.call(value, key)) {
      fn = own$2.call(handlers, value[key]) ? handlers[value[key]] : one.unknown;
    }

    if (fn) {
      return fn.apply(this, arguments)
    }
  }

  one.handlers = settings.handlers || {};
  one.invalid = settings.invalid;
  one.unknown = settings.unknown;

  return one
}

const rtlRange = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC';
const ltrRange =
  'A-Za-z\u00C0-\u00D6\u00D8-\u00F6' +
  '\u00F8-\u02B8\u0300-\u0590\u0800-\u1FFF\u200E\u2C00-\uFB1C' +
  '\uFE00-\uFE6F\uFEFD-\uFFFF';

/* eslint-disable no-misleading-character-class */
const rtl = new RegExp('^[^' + ltrRange + ']*[' + rtlRange + ']');
const ltr = new RegExp('^[^' + rtlRange + ']*[' + ltrRange + ']');
/* eslint-enable no-misleading-character-class */

/**
 * Detect the direction of text: left-to-right, right-to-left, or neutral
 *
 * @param {string} value
 * @returns {'rtl'|'ltr'|'neutral'}
 */
function direction(value) {
  const source = String(value || '');
  return rtl.test(source) ? 'rtl' : ltr.test(source) ? 'ltr' : 'neutral'
}

/**
 * @typedef {import('unist').Node} Node
 * @typedef {import('unist').Parent} Parent
 * @typedef {import('hast').Element} Element
 *
 * @typedef {string} TagName
 * @typedef {null|undefined|TagName|TestFunctionAnything|Array.<TagName|TestFunctionAnything>} Test
 */

/**
 * @template {Element} T
 * @typedef {null|undefined|T['tagName']|TestFunctionPredicate<T>|Array.<T['tagName']|TestFunctionPredicate<T>>} PredicateTest
 */

/**
 * Check if an element passes a test
 *
 * @callback TestFunctionAnything
 * @param {Element} element
 * @param {number|null|undefined} [index]
 * @param {Parent|null|undefined} [parent]
 * @returns {boolean|void}
 */

/**
 * Check if an element passes a certain node test
 *
 * @template {Element} X
 * @callback TestFunctionPredicate
 * @param {Element} element
 * @param {number|null|undefined} [index]
 * @param {Parent|null|undefined} [parent]
 * @returns {element is X}
 */

/**
 * Check if a node is an element and passes a certain node test
 *
 * @callback AssertAnything
 * @param {unknown} [node]
 * @param {number|null|undefined} [index]
 * @param {Parent|null|undefined} [parent]
 * @returns {boolean}
 */

/**
 * Check if a node is an element and passes a certain node test
 *
 * @template {Element} Y
 * @callback AssertPredicate
 * @param {unknown} [node]
 * @param {number|null|undefined} [index]
 * @param {Parent|null|undefined} [parent]
 * @returns {node is Y}
 */

// Check if `node` is an `element` and whether it passes the given test.
const isElement =
  /**
   * Check if a node is an element and passes a test.
   * When a `parent` node is known the `index` of node should also be given.
   *
   * @type {(
   *   (() => false) &
   *   (<T extends Element = Element>(node: unknown, test?: PredicateTest<T>, index?: number, parent?: Parent, context?: unknown) => node is T) &
   *   ((node: unknown, test: Test, index?: number, parent?: Parent, context?: unknown) => boolean)
   * )}
   */
  (
    /**
     * Check if a node passes a test.
     * When a `parent` node is known the `index` of node should also be given.
     *
     * @param {unknown} [node] Node to check
     * @param {Test} [test] When nullish, checks if `node` is a `Node`.
     * When `string`, works like passing `function (node) {return node.type === test}`.
     * When `function` checks if function passed the node is true.
     * When `array`, checks any one of the subtests pass.
     * @param {number} [index] Position of `node` in `parent`
     * @param {Parent} [parent] Parent of `node`
     * @param {unknown} [context] Context object to invoke `test` with
     * @returns {boolean} Whether test passed and `node` is an `Element` (object with `type` set to `element` and `tagName` set to a non-empty string).
     */
    // eslint-disable-next-line max-params
    function (node, test, index, parent, context) {
      const check = convertElement(test);

      if (
        index !== undefined &&
        index !== null &&
        (typeof index !== 'number' ||
          index < 0 ||
          index === Number.POSITIVE_INFINITY)
      ) {
        throw new Error('Expected positive finite index for child node')
      }

      if (
        parent !== undefined &&
        parent !== null &&
        (!parent.type || !parent.children)
      ) {
        throw new Error('Expected parent node')
      }

      // @ts-expect-error Looks like a node.
      if (!node || !node.type || typeof node.type !== 'string') {
        return false
      }

      if (
        (parent === undefined || parent === null) !==
        (index === undefined || index === null)
      ) {
        throw new Error('Expected both parent and index')
      }

      return check.call(context, node, index, parent)
    }
  );

const convertElement =
  /**
   * @type {(
   *   (<T extends Element>(test: T['tagName']|TestFunctionPredicate<T>) => AssertPredicate<T>) &
   *   ((test?: Test) => AssertAnything)
   * )}
   */
  (
    /**
     * Generate an assertion from a check.
     * @param {Test} [test]
     * When nullish, checks if `node` is a `Node`.
     * When `string`, works like passing `function (node) {return node.type === test}`.
     * When `function` checks if function passed the node is true.
     * When `object`, checks that all keys in test are in node, and that they have (strictly) equal values.
     * When `array`, checks any one of the subtests pass.
     * @returns {AssertAnything}
     */
    function (test) {
      if (test === undefined || test === null) {
        return element$1
      }

      if (typeof test === 'string') {
        return tagNameFactory(test)
      }

      if (typeof test === 'object') {
        return anyFactory$1(test)
      }

      if (typeof test === 'function') {
        return castFactory$1(test)
      }

      throw new Error('Expected function, string, or array as test')
    }
  );

/**
 * @param {Array.<TagName|TestFunctionAnything>} tests
 * @returns {AssertAnything}
 */
function anyFactory$1(tests) {
  /** @type {Array.<AssertAnything>} */
  const checks = [];
  let index = -1;

  while (++index < tests.length) {
    checks[index] = convertElement(tests[index]);
  }

  return castFactory$1(any)

  /**
   * @this {unknown}
   * @param {unknown[]} parameters
   * @returns {boolean}
   */
  function any(...parameters) {
    let index = -1;

    while (++index < checks.length) {
      if (checks[index].call(this, ...parameters)) {
        return true
      }
    }

    return false
  }
}

/**
 * Utility to convert a string into a function which checks a given node’s tag
 * name for said string.
 *
 * @param {TagName} check
 * @returns {AssertAnything}
 */
function tagNameFactory(check) {
  return tagName

  /**
   * @param {unknown} node
   * @returns {boolean}
   */
  function tagName(node) {
    return element$1(node) && node.tagName === check
  }
}

/**
 * @param {TestFunctionAnything} check
 * @returns {AssertAnything}
 */
function castFactory$1(check) {
  return assertion

  /**
   * @this {unknown}
   * @param {unknown} node
   * @param {Array.<unknown>} parameters
   * @returns {boolean}
   */
  function assertion(node, ...parameters) {
    // @ts-expect-error: fine.
    return element$1(node) && Boolean(check.call(this, node, ...parameters))
  }
}

/**
 * Utility to return true if this is an element.
 * @param {unknown} node
 * @returns {node is Element}
 */
function element$1(node) {
  return Boolean(
    node &&
      typeof node === 'object' &&
      // @ts-expect-error Looks like a node.
      node.type === 'element' &&
      // @ts-expect-error Looks like an element.
      typeof node.tagName === 'string'
  )
}

/**
 * @fileoverview
 *   Get the plain-text value of a hast node.
 * @longdescription
 *   ## Use
 *
 *   ```js
 *   import {h} from 'hastscript'
 *   import {toString} from 'hast-util-to-string'
 *
 *   toString(h('p', 'Alpha'))
 *   //=> 'Alpha'
 *   toString(h('div', [h('b', 'Bold'), ' and ', h('i', 'italic'), '.']))
 *   //=> 'Bold and italic.'
 *   ```
 *
 *   ## API
 *
 *   ### `toString(node)`
 *
 *   Transform a node to a string.
 */

/**
 * @typedef {import('hast').Root} Root
 * @typedef {import('hast').Element} Element
 * @typedef {Root|Root['children'][number]} Node
 */

/**
 * Get the plain-text value of a hast node.
 *
 * @param {Node} node
 * @returns {string}
 */
function toString(node) {
  // “The concatenation of data of all the Text node descendants of the context
  // object, in tree order.”
  if ('children' in node) {
    return all(node)
  }

  // “Context object’s data.”
  return 'value' in node ? node.value : ''
}

/**
 * @param {Node} node
 * @returns {string}
 */
function one(node) {
  if (node.type === 'text') {
    return node.value
  }

  return 'children' in node ? all(node) : ''
}

/**
 * @param {Root|Element} node
 * @returns {string}
 */
function all(node) {
  let index = -1;
  /** @type {string[]} */
  const result = [];

  while (++index < node.children.length) {
    result[index] = one(node.children[index]);
  }

  return result.join('')
}

/**
 * @typedef {import('unist').Node} Node
 * @typedef {import('unist').Parent} Parent
 *
 * @typedef {string} Type
 * @typedef {Object<string, unknown>} Props
 *
 * @typedef {null|undefined|Type|Props|TestFunctionAnything|Array.<Type|Props|TestFunctionAnything>} Test
 */

const convert =
  /**
   * @type {(
   *   (<T extends Node>(test: T['type']|Partial<T>|TestFunctionPredicate<T>) => AssertPredicate<T>) &
   *   ((test?: Test) => AssertAnything)
   * )}
   */
  (
    /**
     * Generate an assertion from a check.
     * @param {Test} [test]
     * When nullish, checks if `node` is a `Node`.
     * When `string`, works like passing `function (node) {return node.type === test}`.
     * When `function` checks if function passed the node is true.
     * When `object`, checks that all keys in test are in node, and that they have (strictly) equal values.
     * When `array`, checks any one of the subtests pass.
     * @returns {AssertAnything}
     */
    function (test) {
      if (test === undefined || test === null) {
        return ok
      }

      if (typeof test === 'string') {
        return typeFactory(test)
      }

      if (typeof test === 'object') {
        return Array.isArray(test) ? anyFactory(test) : propsFactory(test)
      }

      if (typeof test === 'function') {
        return castFactory(test)
      }

      throw new Error('Expected function, string, or object as test')
    }
  );
/**
 * @param {Array.<Type|Props|TestFunctionAnything>} tests
 * @returns {AssertAnything}
 */
function anyFactory(tests) {
  /** @type {Array.<AssertAnything>} */
  const checks = [];
  let index = -1;

  while (++index < tests.length) {
    checks[index] = convert(tests[index]);
  }

  return castFactory(any)

  /**
   * @this {unknown}
   * @param {unknown[]} parameters
   * @returns {boolean}
   */
  function any(...parameters) {
    let index = -1;

    while (++index < checks.length) {
      if (checks[index].call(this, ...parameters)) return true
    }

    return false
  }
}

/**
 * Utility to assert each property in `test` is represented in `node`, and each
 * values are strictly equal.
 *
 * @param {Props} check
 * @returns {AssertAnything}
 */
function propsFactory(check) {
  return castFactory(all)

  /**
   * @param {Node} node
   * @returns {boolean}
   */
  function all(node) {
    /** @type {string} */
    let key;

    for (key in check) {
      // @ts-expect-error: hush, it sure works as an index.
      if (node[key] !== check[key]) return false
    }

    return true
  }
}

/**
 * Utility to convert a string into a function which checks a given node’s type
 * for said string.
 *
 * @param {Type} check
 * @returns {AssertAnything}
 */
function typeFactory(check) {
  return castFactory(type)

  /**
   * @param {Node} node
   */
  function type(node) {
    return node && node.type === check
  }
}

/**
 * Utility to convert a string into a function which checks a given node’s type
 * for said string.
 * @param {TestFunctionAnything} check
 * @returns {AssertAnything}
 */
function castFactory(check) {
  return assertion

  /**
   * @this {unknown}
   * @param {Array.<unknown>} parameters
   * @returns {boolean}
   */
  function assertion(...parameters) {
    // @ts-expect-error: spreading is fine.
    return Boolean(check.call(this, ...parameters))
  }
}

// Utility to return true.
function ok() {
  return true
}

/**
 * @param {string} d
 * @returns {string}
 */
function color(d) {
  return '\u001B[33m' + d + '\u001B[39m'
}

/**
 * @typedef {import('unist').Node} Node
 * @typedef {import('unist').Parent} Parent
 * @typedef {import('unist-util-is').Test} Test
 * @typedef {import('./complex-types').Action} Action
 * @typedef {import('./complex-types').Index} Index
 * @typedef {import('./complex-types').ActionTuple} ActionTuple
 * @typedef {import('./complex-types').VisitorResult} VisitorResult
 * @typedef {import('./complex-types').Visitor} Visitor
 */

/**
 * Continue traversing as normal
 */
const CONTINUE = true;
/**
 * Do not traverse this node’s children
 */
const SKIP = 'skip';
/**
 * Stop traversing immediately
 */
const EXIT = false;

/**
 * Visit children of tree which pass a test
 *
 * @param tree Abstract syntax tree to walk
 * @param test Test node, optional
 * @param visitor Function to run for each node
 * @param reverse Visit the tree in reverse order, defaults to false
 */
const visitParents =
  /**
   * @type {(
   *   (<Tree extends Node, Check extends Test>(tree: Tree, test: Check, visitor: import('./complex-types').BuildVisitor<Tree, Check>, reverse?: boolean) => void) &
   *   (<Tree extends Node>(tree: Tree, visitor: import('./complex-types').BuildVisitor<Tree>, reverse?: boolean) => void)
   * )}
   */
  (
    /**
     * @param {Node} tree
     * @param {Test} test
     * @param {import('./complex-types').Visitor<Node>} visitor
     * @param {boolean} [reverse]
     */
    function (tree, test, visitor, reverse) {
      if (typeof test === 'function' && typeof visitor !== 'function') {
        reverse = visitor;
        // @ts-expect-error no visitor given, so `visitor` is test.
        visitor = test;
        test = null;
      }

      const is = convert(test);
      const step = reverse ? -1 : 1;

      factory(tree, null, [])();

      /**
       * @param {Node} node
       * @param {number?} index
       * @param {Array.<Parent>} parents
       */
      function factory(node, index, parents) {
        /** @type {Object.<string, unknown>} */
        // @ts-expect-error: hush
        const value = typeof node === 'object' && node !== null ? node : {};
        /** @type {string|undefined} */
        let name;

        if (typeof value.type === 'string') {
          name =
            typeof value.tagName === 'string'
              ? value.tagName
              : typeof value.name === 'string'
              ? value.name
              : undefined;

          Object.defineProperty(visit, 'name', {
            value:
              'node (' +
              color(value.type + (name ? '<' + name + '>' : '')) +
              ')'
          });
        }

        return visit

        function visit() {
          /** @type {ActionTuple} */
          let result = [];
          /** @type {ActionTuple} */
          let subresult;
          /** @type {number} */
          let offset;
          /** @type {Array.<Parent>} */
          let grandparents;

          if (!test || is(node, index, parents[parents.length - 1] || null)) {
            result = toResult(visitor(node, parents));

            if (result[0] === EXIT) {
              return result
            }
          }

          // @ts-expect-error looks like a parent.
          if (node.children && result[0] !== SKIP) {
            // @ts-expect-error looks like a parent.
            offset = (reverse ? node.children.length : -1) + step;
            // @ts-expect-error looks like a parent.
            grandparents = parents.concat(node);

            // @ts-expect-error looks like a parent.
            while (offset > -1 && offset < node.children.length) {
              // @ts-expect-error looks like a parent.
              subresult = factory(node.children[offset], offset, grandparents)();

              if (subresult[0] === EXIT) {
                return subresult
              }

              offset =
                typeof subresult[1] === 'number' ? subresult[1] : offset + step;
            }
          }

          return result
        }
      }
    }
  );

/**
 * @param {VisitorResult} value
 * @returns {ActionTuple}
 */
function toResult(value) {
  if (Array.isArray(value)) {
    return value
  }

  if (typeof value === 'number') {
    return [CONTINUE, value]
  }

  return [value]
}

/**
 * @typedef {import('unist').Node} Node
 * @typedef {import('unist').Parent} Parent
 * @typedef {import('unist-util-is').Test} Test
 * @typedef {import('unist-util-visit-parents').VisitorResult} VisitorResult
 * @typedef {import('./complex-types').Visitor} Visitor
 */

/**
 * Visit children of tree which pass a test
 *
 * @param tree Abstract syntax tree to walk
 * @param test Test, optional
 * @param visitor Function to run for each node
 * @param reverse Fisit the tree in reverse, defaults to false
 */
const visit =
  /**
   * @type {(
   *   (<Tree extends Node, Check extends Test>(tree: Tree, test: Check, visitor: import('./complex-types').BuildVisitor<Tree, Check>, reverse?: boolean) => void) &
   *   (<Tree extends Node>(tree: Tree, visitor: import('./complex-types').BuildVisitor<Tree>, reverse?: boolean) => void)
   * )}
   */
  (
    /**
     * @param {Nod