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<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>发布-订阅模式示例</title><style>#responseArea {white-space: pre-wrap; min-height: 100px;border: 1px solid #ccc;padding: 10px;margin-top: 20px;}</style></head><body><h1>发布-订阅模式示例</h1><button onclick="addEvent('myEvent')">订阅事件myEvent，打印 1+ 接收到的数据</button><!-- 验证订阅是否成功[打印:1+first] --><button onclick="publishEvent('first')">发布事件myEvent，发送数据:first</button>