k toc-highlight">回答关键点</a></li><li><a href="#知识点深入" class="table-of-contents__link toc-highlight">知识点深入</a><ul><li><a href="#1-前置概念" class="table-of-contents__link toc-highlight">1. 前置概念</a></li><li><a href="#2-实现原理" class="table-of-contents__link toc-highlight">2. 实现原理</a><ul><li><a href="#21-响应式对象" class="table-of-contents__link toc-highlight">2.1 响应式对象</a></li><li><a href="#22-依赖收集" class="table-of-contents__link to