我们第一个关注点是“加载”，什么是“加载”？

加载是指游戏的js模块载入内存的过程，游戏代码不是一次性，而是分阶段载入，并且按需请求的。了解这一点非常重要，这基本上意味着：

某个游戏对象当前不一定存在
需要跟踪游戏模块的加载来保证功能的可用性

SEAC将SeerH5的加载划分为了三个阶段的内容：

游戏入口文件加载 - 核心模块初始化前
游戏核心模块初始化 - 玩家登录前
玩家登录 - 主面板展开

这三个阶段很好通过肉眼识别：

阶段一：白屏，显示logo
阶段二：登录界面
阶段三：主面板展开

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