uppy/packages/@uppy/utils/src/findAllDOMElements.js

const isDOMElement = require('./isDOMElement')

/**
 * Find one or more DOM elements.
 *
 * @param {string|Node} element
 * @returns {Node[]|null}
 */
module.exports = function findAllDOMElements (element) {
  if (typeof element === 'string') {
    const elements = document.querySelectorAll(element)
    return elements.length === 0 ? null : Array.from(elements)
  }

  if (typeof element === 'object' && isDOMElement(element)) {
    return [element]
  }

  return null
}