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for in 遍历顺序 #52

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lovelmh13 opened this issue Apr 18, 2021 · 0 comments

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lovelmh13 commented Apr 18, 2021

如果对象的 key 是整数属性，则按照整数属性 key 的升序遍历。剩下的属性按照创建顺序遍历。

*整数属性：String(Math.trunc(Number(prop)) === prop 为 true 时，是整数属性

JavaScript for...in 循环出来的对象属性顺序到底是什么规律？

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