ZH: 获取当前构建的平台，如 weapp、swan、alipay、h5、rn、tt、quickapp、qq、jd。
EN: Get the current platform, such as weapp, swan, alipay, h5, rn, tt, quickapp, qq, jd.
ZH: 获取当前构建的平台，如 weapp、swan、alipay、h5、rn、tt、quickapp、qq、jd。
EN: Get the current platform, such as weapp, swan, alipay, h5, rn, tt, quickapp, qq, jd.