我必須在對象中設置值。這就是問題所在：當我嘗試在具有一些道具的對象中編寫道具時，以前的道具將被刪除。我解決了兩個案例，還有最后一個。我需要保存 test2。我該如何解決？謝謝。var obj = {  keyOne: "foo",  keyTwo: {    test1: "baz",    test2: {      test21: ["bar"],    }  }}function setObjectProperty(obj, string, value) {  var path = string.split('.');  var currentObj = obj;  for (var i = 0; i < path.length - 1; i++) {    if (!currentObj[path[i]] || currentObj[path[i]] != "string") {      currentObj[path[i]] = {};      currentObj = currentObj[path[i]];    }  }  currentObj[path[path.length - 1]] = value;};setObjectProperty(obj, 'keyOne', 'new');setObjectProperty(obj, 'keyOne.key.key2', 'newnew');setObjectProperty(obj, 'keyTwo.test1', 'zzz');console.log(obj);