dist/vue-inview.js
function ($arg, $opt) {
  var lastEnter = 0
  var lastExit = 0
  updateLifeCycle(function () {
    if (isDefine($opt) && isObject($opt) && isString($arg)) {
      if (countEntered > lastEnter) {
        isDefine($opt.enter) && hasAtt(createEl.enter, $arg) && $opt.enter(createEl.enter)
        lastEnter = countEntered
      }
      if (countExits > lastExit) {
        isDefine($opt.exit) && hasAtt(createEl.exit,$arg) && $opt.exit(createEl.exit)
        lastExit = countExits
      }
    }
  })
}
function ($arg, $opt) {
  var lastEnter = 0
  var lastExit = 0
  updateLifeCycle(function () {
    if (isDefine($opt) && isObject($opt) && isString($arg)) {
      if (countEntered > lastEnter) {
        isDefine($opt.enter) && hasAtt(createEl.enter, $arg) && $opt.enter(createEl.enter)
        lastEnter = countEntered
      }
      if (countExits > lastExit) {
        isDefine($opt.exit) && hasAtt(createEl.exit,$arg) && $opt.exit(createEl.exit)
        lastExit = countExits
      }
    }
  })
}
($arg → string, $opt → object{ * })
- check and send notification if component has enter or exit