src\platforms\web\entry-runtime-with-compiler.js<br>拓展$mount，解析el，temolata，render<br>解析顺序 Render>temolate> el<br>
src\platforms\web\runtime\index.js<br>声明__patch__ 执行挂载函数mountComponent
src\core\instance\index.js<br>实现VUE构造函数<br>初始化
src\core\instance\init.js <br>initMixin<br>核心初始化逻辑<br>组件属性、事件初始化、2个生命周期、数据响应式<br>
src\core\instance\state.js <br>组件数据初始化<br>响应式处理<br>
src\core\instance\state.js<br>stateMixin<br>实现数据响应式
/$set/$delete/$watch
src\core\instance\events.js<br>eventsMixin<br>关于事件 监听<br>
$emit/$on/$off/$once
src\core\instance\lifecycle.js<br>lifecycleMixin<br>关于生命周期<br>
$_update/%forceUpdate
src\core\instance\render.js<br>renderMixin<br>关于渲染<br>
$nextTick/_render
