function addmeta(name,content){//手动添加mate标签
    let meta = document.createelement('meta');
    meta.content=content;
    meta.name=name;
    document.getelementsbytagname('head')[0].appendchild(meta);
}
addmeta('viewport', 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no');

/*(function (doc, win) {
    var docel = doc.documentelement,
    resizeevt = 'orientationchange' in window ? 'orientationchange' : 'resize',
    recalc = function () {
        var clientwidth = docel.clientwidth;
        if (!clientwidth) return;
        if (clientwidth >= 1500) {
            docel.style.fontsize = '100px';
        } else if (clientwidth >= 1000) {
            docel.style.fontsize = 100 * (clientwidth / 1500) + 'px';
        } else if (clientwidth > 750 && clientwidth < 1000) {
            docel.style.fontsize = 100 * (1000 / 1000) + 'px';
        } else if (clientwidth <= 750) {
            docel.style.fontsize = 100 * (clientwidth / 750) + 'px';
        }
    };

    if (!doc.addeventlistener) return;
    win.addeventlistener(resizeevt, recalc, false);
    doc.addeventlistener('domcontentloaded', recalc, false);
})(document, window);*/

(function (doc, win) {
    var docel = doc.documentelement,
        resizeevt = 'orientationchange' in window ? 'orientationchange' : 'resize',
        recalc = function () {
            var clientwidth = docel.clientwidth;
            if (!clientwidth) return;
            if(clientwidth >= 750){
              docel.style.fontsize = 100 * (clientwidth / 1920) + 'px';
            } else{
                docel.style.fontsize = 110 * (clientwidth / 750) + 'px';
                // docel.style.fontsize = '100px';
            }
        };

    if (!doc.addeventlistener) return;
    win.addeventlistener(resizeevt, recalc, false);
    recalc();
})(document, window);