文章浏览阅读44次。DOM操作是前端开发的基础技能，而document.querySelector是将CSS选择器与JavaScript融合的关键API。它允许开发者用描述性的选择器语法精确定位页面元素，相比传统的getElementById等方法更灵活、更贴近设计表达。querySelector与querySelectorAll的配合，实现了从单元素操作到批量处理的平滑切换 ...

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