javascript - JavaScript通过变量设置对象键[重复](JavaScript set object key by variable [duplicate])

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This question already has answers here) : 这个问题已经在这里有了答案) ：)

How to use a variable for a key in a JavaScript object literal? 如何在JavaScript对象文字中使用变量作为键？) (12 answers) （12个答案）)

How do I create a dynamic key to be added to a JavaScript object variable [duplicate] (2 answers) 如何创建要添加到JavaScript对象变量的动态键[重复] （2个答案）)

Closed 5 years ago . 5年前关闭。)

I am building some objects in JavaScript and pushing those objects into an array, I am storing the key I want to use in a variable then creating my objects like so:

(我正在用JavaScript构建一些对象并将这些对象推入数组，将要使用的键存储在变量中，然后像下面这样创建对象：)

var key = "happyCount";
myArray.push( { key : someValueArray } );

but when I try to examine my array of objects for every object the key is "key" instead of the value of the variable key.

(但是，当我尝试检查每个对象的对象数组时，键是"key"而不是变量键的值。)

Is there any way to set the value of the key from a variable?

(有什么方法可以通过变量设置键的值吗？)

Fiddle for better explanation: http://jsfiddle.net/Fr6eY/3/

(小提琴以获得更好的解释： http : //jsfiddle.net/Fr6eY/3/)

  ask by Hunter McMillen translate from so

Answer 1

You need to make the object first, then use [] to set it.

(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);

UPDATE 2018:

(更新2018：)

If you're able to use ES6 and Babel, you can use this new feature:

(如果您能够使用ES6和Babel，则可以使用此新功能：)

{
    [yourKeyVariable]: someValueArray,
}