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Oct 25, 2017
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Update index.md #580

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2 changes: 1 addition & 1 deletion src/v2/style-guide/index.md
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Expand Up @@ -1537,7 +1537,7 @@ computed: {

**如果一组 `v-if` + `v-else` 的元素类型相同，最好使用 `key` (比如两个 `<div>` 元素)。**

默认情况下，Vue 会尽可能高效的更新 DOM。这意味着其在相同类型的元素之间切换时，会修补以存在的元素，而不是将旧的元素移除然后在同一位置添加一个新元素。如果本不相同的元素被识别为相同，则会出现[意料之外的副作用](https://jsfiddle.net/chrisvfritz/bh8fLeds/)。
默认情况下，Vue 会尽可能高效的更新 DOM。这意味着其在相同类型的元素之间切换时，会修补已存在的元素，而不是将旧的元素移除然后在同一位置添加一个新元素。如果本不相同的元素被识别为相同，则会出现[意料之外的副作用](https://jsfiddle.net/chrisvfritz/bh8fLeds/)。

{% raw %}<div class="style-example example-bad">{% endraw %}
#### 反例
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