https://www.u9c8d.com/tags/javascript/Recent content in JavaScript on 酱鲍Hugozh-CNThu, 23 Dec 2021 09:43:11 +0800https://www.u9c8d.com/jest-antd-uselayouteffect-warning/Thu, 23 Dec 2021 09:43:11 +0800https://www.u9c8d.com/jest-antd-uselayouteffect-warning/https://www.u9c8d.com/%E6%89%8B%E5%86%99%E5%89%8D%E7%AB%AF%E5%B8%B8%E7%94%A8%E5%8A%9F%E8%83%BD/Sat, 02 Jan 2021 23:03:48 +0800https://www.u9c8d.com/%E6%89%8B%E5%86%99%E5%89%8D%E7%AB%AF%E5%B8%B8%E7%94%A8%E5%8A%9F%E8%83%BD/https://www.u9c8d.com/webpack-%E8%87%AA%E5%AE%9A%E4%B9%89plugin/Sat, 25 Jul 2020 12:21:12 +0800https://www.u9c8d.com/webpack-%E8%87%AA%E5%AE%9A%E4%B9%89plugin/https://www.u9c8d.com/webpack-%E8%87%AA%E5%AE%9A%E4%B9%89loader/Thu, 23 Jul 2020 19:02:54 +0800https://www.u9c8d.com/webpack-%E8%87%AA%E5%AE%9A%E4%B9%89loader/https://www.u9c8d.com/%E4%B8%80%E4%B8%AA%E5%BE%AE%E4%BF%A1%E5%B0%8F%E7%A8%8B%E5%BA%8F%E5%9C%A8ios%E4%B8%8B%E7%9A%84%E6%97%B6%E9%97%B4%E6%A0%BC%E5%BC%8F%E9%97%AE%E9%A2%98/Sun, 26 Apr 2020 11:09:50 +0800https://www.u9c8d.com/%E4%B8%80%E4%B8%AA%E5%BE%AE%E4%BF%A1%E5%B0%8F%E7%A8%8B%E5%BA%8F%E5%9C%A8ios%E4%B8%8B%E7%9A%84%E6%97%B6%E9%97%B4%E6%A0%BC%E5%BC%8F%E9%97%AE%E9%A2%98/https://www.u9c8d.com/%E4%B8%80%E6%AC%A1js%E8%BF%9E%E7%BB%AD%E6%97%B6%E9%97%B4%E5%88%A4%E6%96%AD%E9%97%AE%E9%A2%98%E7%9A%84%E6%8E%92%E6%9F%A5/Sat, 23 Nov 2019 13:39:54 +0800https://www.u9c8d.com/%E4%B8%80%E6%AC%A1js%E8%BF%9E%E7%BB%AD%E6%97%B6%E9%97%B4%E5%88%A4%E6%96%AD%E9%97%AE%E9%A2%98%E7%9A%84%E6%8E%92%E6%9F%A5/<p>最近接手的一个业务，历史遗留下关于连续登录天数功能的 bug，历史代码有一项判断是否连续登录天数的逻辑，正好复习一下 JS 关于时间的操作。</p> <!-- more --> <p>在之前自己使用过 <code>moment</code> 库实现过类似功能：</p>https://www.u9c8d.com/%E8%B8%A9%E4%BA%86%E4%B8%80%E4%B8%AA%E5%85%B3%E4%BA%8Enan%E7%9A%84%E5%B0%8F%E5%9D%91/Fri, 18 Jan 2019 22:10:19 +0800https://www.u9c8d.com/%E8%B8%A9%E4%BA%86%E4%B8%80%E4%B8%AA%E5%85%B3%E4%BA%8Enan%E7%9A%84%E5%B0%8F%E5%9D%91/<p>数值运算出错时，比如任何数除以0都会导致错误而终止程序运行，但是在 JavaScript 中不会影响程序执行，而是会返回一个特殊值 &ndash; <code>NaN(Not a Number)</code>，表示本来要返回数值的操作数未返回数值的情况。最近在一个使用 js 开发的项目中，一不小心就踩到了一个关于 <code>NaN</code> 的坑。</p>https://www.u9c8d.com/%E4%BD%BF%E7%94%A8promise%E8%A7%A3%E5%86%B3%E5%9B%9E%E8%B0%83%E5%9C%B0%E7%8B%B1%E9%97%AE%E9%A2%98/Fri, 21 Apr 2017 14:58:29 +0800https://www.u9c8d.com/%E4%BD%BF%E7%94%A8promise%E8%A7%A3%E5%86%B3%E5%9B%9E%E8%B0%83%E5%9C%B0%E7%8B%B1%E9%97%AE%E9%A2%98/https://www.u9c8d.com/js%E6%B7%B1%E6%8B%B7%E8%B4%9D/Thu, 02 Mar 2017 14:09:22 +0800https://www.u9c8d.com/js%E6%B7%B1%E6%8B%B7%E8%B4%9D/<p>JavaScript数据类型分为基础数据类型和引用数据类型，基础类型的复制直接复制给其它变量即可，但是JS本身不支持引用类型的深拷贝，所以简单记录如何实现JS的深拷贝。</p>