allexysleeps

const flattenChildren = (children) => children
  .reduce(
    (flattenedNextLevelChildren, child) => [...flattenedNextLevelChildren, ...child.children],
    []
  )

function getTreeWidth(tree) {
  let width = 1
  if (!tree.children.length) {
    return width

allexysleeps

const getRandNum = (range) => Math.floor(Math.random() * range)

const shuffleList = (list) => {
  const len = list.length
  for (let i = 0; i < len; i++) {
    const idx = getRandNum(len - i)
    const last = len - i - 1
    const tmp = list[last]
    list[last] = list[idx]
    list[idx] = tmp