如何在javascript中动态命名对象中的元素？

Question

我正在function创建一个对象：

createObject(attr) {
    return {
        attr: "test"
    }
}

我想attr命名function parameter。现在我最终得到了这个对象：

{
    attr: "test"
}

我该怎么做？

Answer 1

创建一个新对象并使用括号表示法来设置属性。

function createObject(attr) {
    var obj = {};
    obj[attr] = "test";
    return obj;
}

Answer 2

我制作了这支笔，向您展示如何构建对象：

http://codepen.io/dieggger/pen/pJXJex

//function receiving the poarameter to construct the object
var createObject = function(attr) {
  //custom object with one predefined value.
   var myCustomObject = {
    anything: "myAnything",
  };

 //adding property to the object 
  myCustomObject[attr] = "Test";

 //returning the constructed object
  return myCustomObject;

}

//invoking function and assigning the returned object to a variable
var objReturned = createObject("name");

//simple alert , to test if it worked
alert(objReturned.name);

Answer 3

这样吗？

createObject(attrName) {
    var obj = {};
    obj[attrName] = 'test';
    return obj;
}