javascript - 是否可以向JavaScript对象添加动态命名的属性？(Is it possible to add dynamically named properties to JavaScript object?)

Question

In JavaScript, I've created an object like so:

(在JavaScript中，我创建了一个像这样的对象：)

var data = {
    'PropertyA': 1,
    'PropertyB': 2,
    'PropertyC': 3
};

Is it possible to add further properties to this object after it's initial creation if the properties name is not determined until run time?

(如果直到运行时才确定属性名称，是否可以在初始创建此对象后为其添加其他属性？)

ie

(即)

var propName = 'Property' + someUserInput
//imagine someUserInput was 'Z', how can I now add a 'PropertyZ' property to 
//my object?

  ask by Lee D translate from so

Answer 1

Yes.

(是。)

 var data = { 'PropertyA': 1, 'PropertyB': 2, 'PropertyC': 3 }; data["PropertyD"] = 4; // dialog box with 4 in it alert(data.PropertyD); alert(data["PropertyD"]);