如图3所示，ExtJS还提供树控件，这种控件提供用户熟悉的与文件系统相似的视图。

As shown in Figure 3, Ext JS also provides tree controls, which provide users with a familiar file system-like view.

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如图3所示，ExtJS还提供树控件，这种控件提供用户熟悉的与文件系统相似的视图。

As shown in Figure 3, Ext JS also provides tree controls, which provide users with a familiar file system-like view.

youdao