需通过调用对象方法或改变它们的属性值来完成这个操作。

You perform this manipulation by invoking methods of the objects or changing their property values.

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不仅如此，SVG的标记还可用于动态改变这些属性，因此可以沿着路径移动图形对象或者实现淡入淡出效果。

But why stop there? SVG also has tags that you can use to animate these properties, so you can move a graphics object along a path or fade it in or out.

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Pre - render Yes Yes Yes如果你想对UI对象做最终的修改，如改变属性结构或属性值，在这些控件保存到ViewState之前。

Pre-render Yes Yes Yes If you want to make final changes to the UI objects like changing tree structure or property values, before these controls are saved in to view state.

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