intrnl

function classnames (...classes) {
  const arr = []

  for (const name of classes) {
    if (typeof name === 'string') {
      arr.push(name)
    }
    else if (typeof name === 'object' && name !== null) {
      for (let [key, value] of Object.entries(name)) {
        if (value) arr.push(key)

intrnl

function stripBOM (content) {
  return content.charCodeAt(0) === 0xFEFF ? content.slice(1) : content
}

intrnl

function sleep (ms) {
  return new Promise((res) => setTimeout(res, ms))
}

intrnl

function createElement (tag, props, ...childrens) {
  const elem = Object.assign(document.createElement(tag), props)

  for (const child of childrens) {
    if (child instanceof HTMLElement) elem.append(child)
    else elem.append(document.createTextNode(child))
  }

  return elem
}

intrnl

function debounce (fn, delay, immediate = false) {
  let timeout

  return function () {
    const now = immediate && (
      !timeout || timeout._destroyed || timeout._called
    )
    const call = () => fn.apply(this, arguments)

    if (now) {

intrnl

function throttle (fn, delay) {
  let timeout

  return function () {
    const now = !timeout || timeout._destroyed || timeout._called
    const call = () => fn.apply(this, arguments)

    if (!now) return

    call()

intrnl

function stringReplaceAsync (string, regex, replacer) {
  if (!regex.global) {
    const match = regex.exec(string)
    if (!match) return string

    const retVal = replacer(...match, match.index, string)

    if (retVal instanceof Promise) {
      return retVal.then((ret) => (
        string.slice(0, match.index) +