可视范围高度

let heightPx = uni.getWindowInfo().windowHeight + uni.getWindowInfo().windowTop

官方手册

uni.getWindowInfo() | uni-app官网uni-app,uniCloud,serverless,uni.getWindowInfo()https://uniapp.dcloud.net.cn/api/system/getWindowInfo.html

实测数据

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uni.getWindowInfo() >> APP-安卓真机实测
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{"pixelRatio": 3,"screenWidth": 360,"screenHeight": 640,"windowWidth": 360,"windowHeight": 640,"statusBarHeight": 24,"safeArea": {"left": 0,"right": 360,"top": 24,"bottom": 640,"width": 360,"height": 616},"safeAreaInsets": {"top": 24,"right": 0,"bottom": 0,"left": 0},"windowTop": 0,"windowBottom": 0,"screenTop": 0
}============================
uni.getWindowInfo() >> 纯H5 - 非公众号
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{"windowTop": 44,"windowBottom": 0,"windowWidth": 390,"windowHeight": 800,"pixelRatio": 3.0000001192092896,"screenWidth": 390,"screenHeight": 844,"statusBarHeight": 0,"safeArea": {"left": 0,"right": 390,"top": 0,"bottom": 844,"width": 390,"height": 844},"safeAreaInsets": {"top": 0,"right": 0,"bottom": 0,"left": 0},"screenTop": 44
}============================
uni.getWindowInfo() >> H5公众号 - 苹果机iPhone13Pro
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{"windowTop": 44,"windowBottom": 0,"windowWidth": 390,"windowHeight": 710,"pixelRatio": 3.0000001192092896,"screenWidth": 390,"screenHeight": 753,"statusBarHeight": 0,"safeArea": {"left": 0,"right": 390,"top": 0,"bottom": 720,"width": 390,"height": 720},"safeAreaInsets": {"top": 0,"right": 0,"bottom": 34,"left": 0},"screenTop": 43
}============================
uni.getWindowInfo() >> H5公众号 - 安卓机Nexus 6
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{"windowTop": 44,"windowBottom": 0,"windowWidth": 412,"windowHeight": 620,"pixelRatio": 3.0000001192092896,"screenWidth": 412,"screenHeight": 664,"statusBarHeight": 0,"safeArea": {"left": 0,"right": 412,"top": 0,"bottom": 664,"width": 412,"height": 664},"safeAreaInsets": {"top": 0,"right": 0,"bottom": 0,"left": 0},"screenTop": 44
}