JavaScript通过变量设置对象关键字
这个问题在这里已经有了答案：
您需要先创建对象，然后使用[]进行设置。
var key = "happyCount";
var obj = {};
obj[key] = someValueArray;
myArray.push(obj);
尝试这样的事情
var yourObject = {};
yourObject[yourKey] = "yourValue";
console.log(yourObject );
例：
var person = {};
var key = "name";
person[key] /* this is same as person.name */ = "John";
console.log(person); // should print Object { name="John"}
var person = {};
var key = "name";
person[key] /* this is same as person.name */ = "John";
console.log(person); // should print Object { name="John"}