underscore/is...

解説

isString()

isNumber()

isNull()

isEmpty()

Underscore.js

(function(){
  const s1Obj = {
  	"name": "sample1",
  	"page": 1,
  	"volume": ""
  };
  console.log(_.isString(s1Obj.name));
  console.log(_.isEmpty(s1Obj.volume));
  console.log(_.isNull(s1Obj.volume));
  console.log(_.isNumber(s1Obj.page));
})();