#vuejs
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编译阶段 template=>render function 渲染阶段 render function=>virtual DOM node 挂载阶段 virtual DOM node=>build webpage patch阶段...
track() 保存代码 effect() 需要运行代码 trigger() 运行所有存储的代码 let dep = new Set(); let effect = ()=>{total=price * quantity} function...