hast-util-to-mdast/lib/util/drop-surrounding-breaks.js

hast utility to transform to mdast

/**
 * @import {Nodes} from 'mdast'
 */

/**
 * Drop trailing initial and final `br`s.
 *
 * @template {Nodes} Node
 *   Node type.
 * @param {Array<Node>} nodes
 *   List of nodes.
 * @returns {Array<Node>}
 *   List of nodes w/o `break`s.
 */
export function dropSurroundingBreaks(nodes) {
  let start = 0
  let end = nodes.length

  while (start < end && nodes[start].type === 'break') start++
  while (end > start && nodes[end - 1].type === 'break') end--

  return start === 0 && end === nodes.length ? nodes : nodes.slice(start, end)
}