判定 JS 数据类型的最佳解决方案

Object.prototype.toString.call({})              
// ‘[object Object]‘
Object.prototype.toString.call([])              
// ‘[object Array]‘
Object.prototype.toString.call(() => {})        
// ‘[object Function]‘
Object.prototype.toString.call(‘hello‘)        
// ‘[object String]‘
Object.prototype.toString.call(null)            
// ‘[object Null]‘
Object.prototype.toString.call(undefined)       
// ‘[object Undefined]‘

var type = function(data) {
      var toString = Object.prototype.toString;
      var dataType = toString
              .call(data)
              .replace(/\[object\s(.+)\]/, "$1")
              .toLowerCase()
      return dataType
};