const baseSize = 16
function setRem() {
    const scale = document.documentElement.clientWidth / 828
    document.documentElement.style.fontSize = baseSize * scale + 'px'
}
function isMobile() {
    let userAgentInfo = navigator.userAgent;
    let Agents = ['Android', 'iPhone', 'SymbianOS', 'Windows Phone', 'iPad', 'iPod'];
    let getArr = Agents.filter(i => userAgentInfo.includes(i));
    return getArr.length ? true : false;
}
if (isMobile()) {
    setRem()
}
window.onresize = function () {
    if (isMobile()) {
        setRem()
    }

}