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https://tlcheng.wordpress.com/2018/09/01/h5-%e5%81%b5%e6%b8%ac%e4%b8%8d%e5%90%8c%e8%a3%9d%e7%bd%ae%e7%9a%84%e8%a7%a3%e6%9e%90%e5%ba%a6/
[H5] 偵測不同裝置的解析度