Lazy loading images
Lazy loading images là thu?t ng? v? th? thu?t ch? load hình ?nh khi c?n dùng ??n chúng, vi?c này s? giúp gi?m th?i gian load, t?ng tr?i…
Detect Os
function getOS() { var userAgent = window.navigator.userAgent, platform = window.navigator?.userAgentData?.platform || window.navigator.platform, macosPlatforms = ['Macintosh', 'MacIntel', 'MacPPC', 'Mac68K'], windowsPlatforms = ['Win32', 'Win64', 'Windows', 'WinCE'], iosPlatforms = ['iPhone', 'iPad',…
