Now why would anyone complain about a native drawing API in the browser?
现在，为何还有人会抱怨浏览器中的一个原生画图 API 呢？
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Although most of the SWT API can be implemented, some things such as drawing on the canvas or detection of mouse movement will have to await further browser enhancements in these areas.
For many years, the Web has relied on external plug-ins to deliver features that cannot be natively supported by the Web browser, particularly in terms of 2d drawing, animation, and multimedia.