2021-05-05 10:13:49 -07:00
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---
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id: 56bbb991ad1ed5201cd392d1
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title: 更新對象屬性
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/c9yEJT4'
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forumTopicId: 18336
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dashedName: updating-object-properties
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---
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# --description--
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在你創建了 JavaScript 對象後,你可以隨時更新它的屬性,就像更新任何其他變量那樣。 你可以使用點或中括號操作符來更新。
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舉個例子,讓我們看看 `ourDog`:
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```js
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2021-10-27 15:10:57 +00:00
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const ourDog = {
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"name": "Camper",
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"legs": 4,
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"tails": 1,
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"friends": ["everything!"]
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};
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```
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既然他是一個特別愉快的狗,讓我們將他的名字更改爲字符串 `Happy Camper`。 這有兩種方式來更新對象的 name 屬性: `ourDog.name = "Happy Camper";` 或 `ourDog["name"] = "Happy Camper";`。更新後,`ourDog.name` 的值就不再是 `Camper`,而是 `Happy Camper`。
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# --instructions--
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更新 `myDog` 對象的 name 屬性。 讓它的名字從 `Coder` 變成 `Happy Coder`。 你可以使用點號表示法或方括號表示法來完成此挑戰。
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# --hints--
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更新 `myDog` 的 `name` 屬性,使其等於 `Happy Coder`。
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```js
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assert(/happy coder/gi.test(myDog.name));
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```
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不要修改 `myDog` 的定義。
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```js
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assert(/"name": "Coder"/.test(code));
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```
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# --seed--
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## --after-user-code--
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```js
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(function(z){return z;})(myDog);
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```
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## --seed-contents--
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```js
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// Setup
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const myDog = {
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"name": "Coder",
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"legs": 4,
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"tails": 1,
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"friends": ["freeCodeCamp Campers"]
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};
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// Only change code below this line
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```
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# --solutions--
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```js
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2021-10-27 15:10:57 +00:00
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const myDog = {
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2021-05-05 10:13:49 -07:00
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"name": "Coder",
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"legs": 4,
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"tails": 1,
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"friends": ["freeCodeCamp Campers"]
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};
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myDog.name = "Happy Coder";
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```
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