指定更新区域的背景是否被擦除。

Specifies whether the background within the update region is to be erased.

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用户可以选择直接跳转到更新区域，或者忽略更新并在稍后处理它。

Users can choose to jump directly to the updated regions or ignore the update and deal with it later.

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可以使用不同的可视技术，把用户的眼球带到页面的更新区域，从而缓解这个问题。

You can alleviate this problem by using a variety of visual techniques to subtly draw the user's eye to updated areas of the page.

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