html組み込み実行時の警告・エラー表示用JSファイル by てぃふと@うぇいく

(function(){
  if (typeof navigator === 'object') {
    const listeningType=['warn','error']
    const includeUpperLevel=false
    const targetId='nako3target_'+listeningType+'_'+Date.now()
    const callback=function (obj) {
      document.getElementById(targetId).innerHTML += obj.html
      document.getElementById(targetId).style.display = 'block'
    }
    document.write('<div id="'+targetId+'" style="display:none"></div>')
    if (typeof navigator.nako3 === 'object') {
      if (typeof listeningType === 'string') {
        navigator.nako3.logger.addListener(listeningType,callback,includeUpperLevel)
      } else {
        listeningType.forEach(function(obj){
          navigator.nako3.logger.addListener(obj,callback,false)
        })
      }
    } else {
      if (typeof navigator.nako3loglistener === 'undefined') {
        navigator.nako3loglistener=[]
      }
      if (typeof listeningType === 'string') {
        navigator.nako3loglistener.push({
          type:listeningType,
          upperlevel:includeUpperLevel,
          callback:callback
        })
      } else {
        listeningType.forEach(function(obj){
          navigator.nako3loglistener.push({
            type:obj,
            upperlevel:false,
            callback:callback
          })
        })
      }
    }
  }
})();