js 在for 循环内加了计数器之后的值变化

淡淡的烟草味﹌ 2023-01-22 04:50 15阅读 0赞

在看es6的资料时，发现这个例子。在面试题中也经常出现：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyMTgyOTg5_size_16_color_FFFFFF_t_70][]

这里的第一个for循环、如果不加定时器的话。会输出 0123456789但是加了定时器之后，就答应了十个【10】

下面那个使用es6的let声明，虽然加了定时器。但是却输出 0123456789

看似简单其实涉及到了很多知识点

资料：

[https://blog.csdn.net/qq\_37030605/article/details/82871806][https_blog.csdn.net_qq_37030605_article_details_82871806]

[https://blog.csdn.net/chenshi5245/article/details/100714575?utm\_medium=distribute.pc\_relevant\_t0.none-task-blog-2%7Edefault%7EBlogCommendFromMachineLearnPai2%7Edefault-1.control&depth\_1-utm\_source=distribute.pc\_relevant\_t0.none-task-blog-2%7Edefault%7EBlogCommendFromMachineLearnPai2%7Edefault-1.control][https_blog.csdn.net_chenshi5245_article_details_100714575_utm_medium_distribute.pc_relevant_t0.none-task-blog-2_7Edefault_7EBlogCommendFromMachineLearnPai2_7Edefault-1.control_depth_1-utm_source_distribute.pc_relevant_t0.none-task-blog-2_7Edefault_7EBlogCommendFromMachineLearnPai2_7Edefault-1.control]

[https://www.cnblogs.com/hahazexia/p/9446585.html][https_www.cnblogs.com_hahazexia_p_9446585.html]

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[https_blog.csdn.net_qq_37030605_article_details_82871806]: https://blog.csdn.net/qq_37030605/article/details/82871806
[https_blog.csdn.net_chenshi5245_article_details_100714575_utm_medium_distribute.pc_relevant_t0.none-task-blog-2_7Edefault_7EBlogCommendFromMachineLearnPai2_7Edefault-1.control_depth_1-utm_source_distribute.pc_relevant_t0.none-task-blog-2_7Edefault_7EBlogCommendFromMachineLearnPai2_7Edefault-1.control]: https://blog.csdn.net/chenshi5245/article/details/100714575?utm_medium=distribute.pc_relevant_t0.none-task-blog-2~default~BlogCommendFromMachineLearnPai2~default-1.control&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2~default~BlogCommendFromMachineLearnPai2~default-1.control
[https_www.cnblogs.com_hahazexia_p_9446585.html]: https://www.cnblogs.com/hahazexia/p/9446585.html