浅谈对象非空判断

 function isEmptyObj(value){

       return value && Object.keys(value).length === 0 && value.constructor === Object

 }

console.log(isEmptyObj(undefined)) //undefined

console.log(isEmptyObj(null)) //null

console.log(isEmptyObj({a:"11"}))  //true

console.log(isEmptyObj(new Object())) //false