--- id: 56bbb991ad1ed5201cd392d3 title: 刪除對象的屬性 challengeType: 1 videoUrl: 'https://scrimba.com/c/cDqKdTv' forumTopicId: 17560 dashedName: delete-properties-from-a-javascript-object --- # --description-- 我們同樣可以刪除對象的屬性,例如: ```js delete ourDog.bark; ``` 例如: ```js const ourDog = { "name": "Camper", "legs": 4, "tails": 1, "friends": ["everything!"], "bark": "bow-wow" }; delete ourDog.bark; ``` 在上面代碼的最後一行中,`ourDog` 是這樣的: ```js { "name": "Camper", "legs": 4, "tails": 1, "friends": ["everything!"] } ``` # --instructions-- 刪除 `myDog` 對象的 `tails` 屬性。 可以使用點操作符或者中括號操作符。 # --hints-- 應該從 `myDog` 中刪除 `tails` 屬性。 ```js assert(typeof myDog === 'object' && myDog.tails === undefined); ``` 不要修改 `myDog` 的初始化代碼。 ```js assert(code.match(/"tails": 1/g).length > 0); ``` # --seed-- ## --after-user-code-- ```js (function(z){return z;})(myDog); ``` ## --seed-contents-- ```js // Setup const myDog = { "name": "Happy Coder", "legs": 4, "tails": 1, "friends": ["freeCodeCamp Campers"], "bark": "woof" }; // Only change code below this line ``` # --solutions-- ```js const myDog = { "name": "Happy Coder", "legs": 4, "tails": 1, "friends": ["freeCodeCamp Campers"], "bark": "woof" }; delete myDog.tails; ```