hast-util-select/lib/class-name.js

hast utility for `querySelector`, `querySelectorAll`, and `matches`

/**
 * @import {AstClassName} from 'css-selector-parser'
 * @import {Element} from 'hast'
 */

/** @type {Array<never>} */
const emptyClassNames = []

/**
 * Check whether an element has all class names.
 *
 * @param {AstClassName} query
 *   AST rule (with `classNames`).
 * @param {Element} element
 *   Element.
 * @returns {boolean}
 *   Whether `element` matches `query`.
 */
export function className(query, element) {
  // Assume array.
  const value = /** @type {Readonly<Array<string>>} */ (
    element.properties.className || emptyClassNames
  )

  return value.includes(query.name)
}