How to block access to the site from IE?

Question

JavaScript

Hello. It is necessary that when you enter the site with IE it gives out a message that "Your browser is not supported."
I saw that there are scripts that check the user in JS itself, well, as I understand it, there are pluses and minuses there and these plugins work crookedly.
I would like to know how to do this check on the Node.js server?
If there is no way on the server, then advise which plugin is better to use for checking on the client side?

Answer 1

https://stackoverflow.com/questions/6163350/server...

var getDevice = function(ua) {
    var $ = {active: false, subactive: false};

    if (/mobile/i.test(ua)) {
        $.active = 'mobile';
        $.Mobile = true;
    }

    if (/like Mac OS X/.test(ua)) {
        $.active = 'iOS';
        $.iOS = /CPU( iPhone)? OS ([0-9\._]+) like Mac OS X/.exec(ua)[2].replace(/_/g, '.');
        if (/like Mac OS X/.test(ua)) {
            $.subactive = 'iPhone';
            $.iPhone = /iPhone/.test(ua);
        }
        if (/like Mac OS X/.test(ua)) {
            $.subactive = 'iPad';
            $.iPad = /iPad/.test(ua);
        }
    }

    if (/Android/.test(ua)) {
        $.active = 'Android';
        $.Android = /Android ([0-9\.]+)[\);]/.exec(ua)[1];
    }

    if (/webOS\//.test(ua)) {
        $.active = 'webOS';
        $.webOS = /webOS\/([0-9\.]+)[\);]/.exec(ua)[1];
    }

    if (/(Intel|PPC) Mac OS X/.test(ua)) {
        $.active = 'Safari';
        $.Safari = /(Intel|PPC) Mac OS X ?([0-9\._]*)[\)\;]/.exec(ua)[2].replace(/_/g, '.') || true;
    }

    if (/Windows NT/.test(ua)) {
        $.active = 'IE';
        $.IE = /Windows NT ([0-9\._]+)[\);]/.exec(ua)[1];
    }
    if (/MSIE/.test(ua)) {
        $.active = 'IE';
        $.IE = /MSIE ([0-9]+[\.0-9]*)/.exec(ua)[1];
    }
    if (/Trident/.test(ua)) {
        $.active = 'IE';
        $.IE = /Trident\/.*rv:([0-9]+[\.0-9]*)/.exec(ua)[1];
    }
    if (/Edge\/\d+/.test(ua)) {
        $.active = 'IE Edge';
        $.IE = /Edge\/(\d+)/.exec(ua)[1];
    }

    return $.active + ' ' + $[$.active] + ($.subactive && ' ' + $.subactive + ' ' + $[$.subactive]);
};

Answer 2

check useragent, if ie - then "Your browser is not supported".