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並前往https://kuro.tw/posts/2019/08/04/JS-%E5%86%B7%E7%9F%A5%E8%AD%98-%E4%BD%A0%E6%89%80%E4%B8%8D%E7%9F%A5%E9%81%93%E7%9A%84-void/

JS 冷知識: 你所不知道的void - Kuro's Blog

Return undefined. NOTE: GetValue must be called even though its value is not used because it may have observable side-effects. 雖然無論 void ...

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