Flags a property as an accessor function for an element of the default collection.

将属性标记为默认集合的某个元素的访问器函数。

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Inlining a very small accessor function will usually decrease code size while inlining a very large function can dramatically increase code size.

内联一个非常小成员访问函数会减少代码，而内联一个非常大的函数代码会戏剧性的增长。

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The example above uses the attr() function, which is an accessor and mutator for the attributes of an element.

上面的例子使用了 attr() 函数，这是一个元素中的属性的 accessor 和 mutator。

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