I read javascript document to know MouseEvent.clientX.
I can't understand when and why use "Redefined from long to double". Is clientX always returns long type?
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):
I read javascript document to know MouseEvent.clientX.
I can't understand when and why use "Redefined from long to double". Is clientX always returns long type?
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