Javascript/split()

str.split("分割文字")

str.split("分割文字, 分割の上限数")

function s1Func(){
  var s1Str = "01.83.dji.2890.dh";
  var s1Strc = s1Str.split(".");
  console.log(s1Strc);
}
	

function s2Func(){
  var s2Str = "01.83.dji.2890.dh";
  var d = ".";
  var s2Strd = s2Str.split(d, 3);
  console.log(s2Strd);
}