点击无触发：工程零干扰元素选择器
Learn how to build a professional DOM element inspector for Chrome extensions. Step-by-step guide to create non-intrusive element selection, prevent default behaviors, and implement smooth highlighting. Includes production-ready code examples.
了解如何为Chrome扩展构建专业的DOM元素检查器。逐步指南创建非侵入式元素选择，防止默认行为，并实现平滑高亮。包括生产就绪的代码示例。
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Co-founder & CEO, Samelogic
联合创始人兼首席执行官，Samelogic
Yesterday I had a chat with one of BrowserUse's co-founders, Magnus Müller, and as I was showing him how our Element Selector extension he had questions around how we prevent default actions on anchors and buttons during element selection. After the call, I thought this would make a good Engineering blog post.
昨天我与BrowserUse的联合创始人Magnus Müller进行了交谈，当我向他展示我们的元素选择器扩展时，他对我们如何在元素选择过程中防止锚点和按钮的默认行为提出了疑问。通话结束后，我认为这可以成为一篇不错的工程博客文章。
So today, I'll share how we built our element inspector that allows users to select and analyze DOM elements without triggering their default behaviors.
所以今天，我将分享我们如何构建我们的元素检查器，使用户能够选择和分析DOM元素而不触发其默认行为。
The Challenge
挑战
When building a DOM element inspector, one of the primary challenges is handling interactive elements like links and buttons. The goal is to:
在构建DOM元素检查器时，主要挑战之一是处理交互元素，如链接和按钮。目标是：
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Allow users to inspect these elements
允许用户检查这些元素
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Prevent navigation or form submissions
防止导航或表单提交
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Maintain visual feedback
保持视觉反馈
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Keep the original page structure intact
保持原始页面结构完整
Solution Architecture
解决方案架构
We'll explore three different approaches, each with its own use cases and trade-offs.
我们将探讨三种不同的方法，每种方法都有其自身的用例和权衡。
1. The Event Prevention Approach
1. 事件预防方法
This is the foundational layer of our solution.
这是我们解决方案的基础层。
Let's break down our base ElementInspector class - the foundation of our non-intrusive DOM selection tool.
让我们来分解一下我们的基础 ElementInspector 类 - 我们非侵入式 DOM 选择工具的基础。
The constructor sets up two critical properties:
构造函数设置了两个关键属性：
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isActive: A boolean flag that tracks whether th...