无法在javascript中将对象插入JSON对象

Question

"myfield": {
        "answers": {
            "Key1": "value1",
            "Key2": "value2"
        }
    }


var Obj2={"key3":"value3"}

我正在努力使用javascript将Obj2放入 myfield 对象

预期结果：

"myfield": {
        "answers": {
            "Key1": "value1",
            "Key2": "value2",
            "Key3": "value3"
        }
    }

Answer 1

您可以使用Object.assign()来获得所需的结果。

＆＃13;

＆＃13;

var obj1 = {
  "myfield": {
    "answers": {
      "Key1": "value1",
      "Key2": "value2"
    }
  }
}
var obj2 = {
  "key3": "value3"
}

Object.assign(obj1.myfield.answers, obj2);
console.log(obj1)

＆＃13;

＆＃13;

＆＃13;

Answer 2

使用for in

var data = {
  "myfield": {
    "answers": {
      "Key1": "value1",
      "Key2": "value2"
    }
  }
}
var obj2 = {
  "key3": "value3"
}

for(k in obj2){
data["myfield"]["answers"][k] = obj2[k]
}
console.log(data);

Answer 3

var json='{'+
        '"answers": {'+
            '"Key1": "value1",'+
            '"Key2": "value2"'+
       ' }'+
    '}';
console.log(JSON.parse(json));
var obj=JSON.parse(json);
obj.answers.key3="value3";
console.log('"myfield":'+JSON.stringify(obj));