本篇技术指南基于现代 JavaScript 教程（zh.javascript.info）第 2 部分「UI 篇」之「浏览器事件简介」章节中的第一个实战练习 —— `01-hide-other`（点击隐藏）。该练习要求为按钮绑定 JavaScript 代码，使页面中的 `` 在点击按钮后消失，是本仓库中学习 DOM 事件处理程序（event handler）的最小可运行 ...

文章浏览阅读3次。本文围绕 zh.javascript.info 教程《浏览器事件简介》章节中的第 5 道练习「创建滑动菜单」展开，完整解析一个纯 HTML/CSS/JavaScript 实现的点击开合菜单：从 HTML 结构设计（为何标题要用 `` 而不是 ``）、CSS 用 `.open` 类驱动状态切换与 `::before` 伪元素箭头，到 JS 侧 `onclick` + `clas ...

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