javascript - 如何在 json 对象中使用可变定义的键？

Question

我正在使用犀牛。我想使用变量来定义 map 的键，如下所示:

var name = "Ryan";
var relationshipType = "brother";
var relatedName = "David";

var json = {
                "name": name,
                "relationships": {
                    relationshipType: relatedName
                }
           };

当我解析这个 json 时，键“relationshipType”，它是文字而不是解析为“兄弟”的定义变量。有什么想法吗？

“relationshipType 未被解析为“兄弟”，如下面的输出所示:

{
    "name": Ryan,
    "relationships": {
         relationshipType: David
    }
};

Answer 1

您可以使用 bracket notation , 像这样

var name = "Ryan";
var relationshipType = "brother";
var relatedName = "David";

var json = {
  "name": name,
  "relationships": {}
};

json[relationshipType] = relatedName;

console.log(json);

如果你会使用ES6语法那么你就可以像这样解决这个问题

var name = "Ryan";
var relationshipType = "brother";
var relatedName = "David";

var json = {
  "name": name,
  "relationships": {
    [relationshipType]: relatedName
  }
};

Example