javascript 创建具有动态属性名称的对象
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Create an object with dynamic property names
提问by blueFast
I am trying to do this:
我正在尝试这样做：
var KEYS = {} ;
KEYS.PHONE_TYPE = 'phone-type';
KEYS.AGENT_TYPE = 'agent-type';
var myAppConfig = {
...
iconMap : {
KEYS.PHONE_TYPE : 'icon-phone',
KEYS.AGENT_TYPE : 'icon-headphones'
};
...
};
But it is failing, with a message: Expected ':' and instead saw '.'.
但它失败了，并显示一条消息： Expected ':' and instead saw '.'.
How can I initialize an object using indirect (non-literal) keynames?
如何使用间接（非文字）键名初始化对象？
To be clear, the result I want is:
要清楚，我想要的结果是：
{
'phone-type' : 'icon-phone',
'agent-type' : 'icon-headphones'
}
回答by Dragos Bobolea
If you're using ES6 (or something like Babel/browserify), you can write it like this:
如果你使用 ES6（或类似 Babel/browserify），你可以这样写：
iconMap : {
[KEYS.PHONE_TYPE] : 'icon-phone',
[KEYS.AGENT_TYPE] : 'icon-headphones'
};
回答by Sirko
You would have to add those properties separately using bracket notation:
您必须使用括号表示法单独添加这些属性：
var myAppConfig = {
...
iconMap : { }
...
};
myAppConfig.iconMap[ KEYS.PHONE_TYPE ] = 'icon-phone';
myAppConfig.iconMap[ KEYS.AGENT_TYPE ] = 'icon-headphones';
