get_siblings.js

// Gets siblings of element.
const getSiblings = (el) => {
  // Array method.
  const f = Array.prototype.forEach

  // Get children.
  const children = el.parentNode.children

  // Set in loop.
  const siblings = []

  // Loop through.
  f.call(children, (item) => {
    // Not element itself, nor text.
    if (
      item !== el &&
      item.nodeType === 1
    ) {
      // Add to array.
      siblings.push(item)
    }
  })

  // Expose array.
  return siblings
}

// Export.
export default getSiblings