也许你可以用这个决定:

var isEmpty = function(obj) {
  for (var key in obj)
    if(obj.hasOwnProperty(key))
      return false;
  return true;
}

这里有一个好方法

function isEmpty(obj) {
  if (Array.isArray(obj)) {
    return obj.length === 0;
  } else if (typeof obj === 'object') {
    for (var i in obj) {
      return false;
    }
    return true;
  } else {
    return !obj;
  }
}

var hasOwnProperty = Object.prototype.hasOwnProperty;
function isArray(a) {
    return Object.prototype.toString.call(a) === '[object Array]'
}
function isObject(a) {
    return Object.prototype.toString.call(a) === '[object Object]'
}
function isEmpty(a) {
    if (null == a || "" == a)return!0;
    if ("number" == typeof a || "string" == typeof a)return!1;
    var b = !0;
    if (isArray(a)) {
        if (!a.length)return!0;
        for (var c = 0; c < a.length; c++)isEmpty(a[c]) || (b = !1);
        return b
    }
    if (isObject(a)) {
        for (var d in a)hasOwnProperty.call(a, d) && (isEmpty(a[d]) || (b = !1));
        return b
    }
    return!0
}

funtion isEmpty(o,i)
{
    for(i in o)
    {
        return!1
    }
    return!0
}

function isEmpty( o ) {
    for ( var p in o ) { 
        if ( o.hasOwnProperty( p ) ) { return false; }
    }
    return true;
}

不需要图书馆。

function(){ //must be within a function
 var obj = {}; //the object to test

 for(var isNotEmpty in obj) //will loop through once if there is a property of some sort, then
    return alert('not empty')//what ever you are trying to do once

 return alert('empty'); //nope obj was empty do this instead;
}