检测不支持的浏览器版本并显示带有消息的特定div

Question

我的网站上有一个聊天机器人，它需要最新版本的浏览器才能完美运行所以我需要向用户显示一条消息“请将您的浏览器更新到最新版本”。我不想使用第三方插件。如果用户使用此js代码使用不受支持的浏览器版本，我该如何显示div

HTML

<div id="printVer"></div>

JS

navigator.sayswho= (function(){
    var ua= navigator.userAgent, tem,
    M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
    if(/trident/i.test(M[1])){
        tem=  /\brv[ :]+(\d+)/g.exec(ua) || [];
        return 'IE '+(tem[1] || '');
    }
    if(M[1]=== 'Chrome'){
        tem= ua.match(/\b(OPR|Edge)\/(\d+)/);
        if(tem!= null) return tem.slice(1).join(' ').replace('OPR', 'Opera');
    }
    M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?'];
    if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]);
    return M.join(' ');
})();
document.getElementById('printVer').innerHTML=navigator.sayswho

Answer 1

navigator.sayswho = ( function () {
    var ua = navigator.userAgent, tem,
        M = ua.match( /(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i ) || [];
    if ( /trident/i.test( M[1] ) ) {
        tem = /\brv[ :]+(\d+)/g.exec( ua ) || [];
        return 'IE ' + ( tem[1] || '' );
    }
    if ( M[1] === 'Chrome' ) {
        tem = ua.match( /\b(OPR|Edge)\/(\d+)/ );
        if ( tem != null ) return tem.slice( 1 ).join( ' ' ).replace( 'OPR', 'Opera' );
    }
    M = M[2] ? [M[1], M[2]] : [navigator.appName, navigator.appVersion, '-?'];
    if ( ( tem = ua.match( /version\/(\d+)/i ) ) != null ) M.splice( 1, 1, tem[1] );
    return M.join( ' ' );
} )();
//document.getElementById('printVer').innerHTML=navigator.sayswho
var str = navigator.sayswho;
var browser = str.substring( 0, str.indexOf( " " ) );
var version = str.substring( str.indexOf( " " ) );
version = version.trim();
version = parseInt( version );
console.log( browser );
console.log( version );

if ( ( browser == "Chrome" && version < 70 ) || ( browser == "Firefox" && version < 53 ) || ( browser == "Safari" && version < 5 ) || ( browser == "IE" && version < 11 ) || ( browser == "Opera" && version < 52 ) ) {
    $( '#printVer' ).show();
}
else {
    $( '#printVer' ).hide();
}

Answer 2

如果你想确定它是否支持浏览器，你可能想要使用jQuery的浏览器检测，例如：

<script type="text/javascript">
// check if browser is IE6 (when IE) or not FF6 (when FF)
if (($.browser.msie && $.browser.version.substr(0,1) == '6')
    || ($.browser.mozilla && $.browser.version.substr(0,1) != '3')) {
        $('#browserWarning').show();
}
</script>

Answer 3

在这里我不检查操作系统，例如移动或bla bla。尝试使用浏览器版本==>

( function ( window ) {
    //Get Browser Type
    var browser = {
        /** Define Browser Type*/
        type:/** Whether we are using a IE Browser or not. */
        typeof ( window.attachEvent ) === 'function' && !( Object.prototype.toString.call( window.opera ) == '[object Opera]' )
            ? 'IE'
            /** Whether we are using a Opera Browser or not. */
            : ( Object.prototype.toString.call( window.opera ) == '[object Opera]' || navigator.userAgent.indexOf( 'Opera Mini' ) > -1 )
                ? 'Opera'
                /** Whether we are using a WebKit Type Browser or not. */
                : ( navigator.userAgent.indexOf( 'AppleWebKit/' ) > -1 )
                    ? 'WebKit'
                    /** Whether we are using a Gecko Type Browser or not. */
                    : ( navigator.userAgent.indexOf( 'Gecko' ) > -1 && navigator.userAgent.indexOf( 'KHTML' ) === -1 )
                        ? 'Gecko'
                        /** Whether we are using a Apple Browser or not. */
                        : ( /Apple.*Mobile/.test( navigator.userAgent ) )
                            ? 'MobileSafari'
                            : undefined
    };
    //Get Browser Version
    browser.version = function () {
        let ua; ua = navigator.userAgent;
        return this.type === 'Gecko' ? /** Whether this browser type is Gecko*/function ( a ) {
            let rv = -1, re = new RegExp( "rv:([0-9]{1,}[\.0-9]{0,})" );
            re.exec( ua ) !== null ? rv = parseFloat( RegExp.$1 ) : '';
            if ( ua.indexOf( 'Firefox/' ) > 0 ) { a.name = 'Firefox'; return rv; }
            if ( ua.indexOf( 'Trident/' ) > 0 ) {/** IE > 10*/a.name = 'IE'; return rv; }
            return rv;
        }( this ) : this.type === 'WebKit' ?/** Whether this browser type is WebKit*/ function ( a, b ) {
            let rv = -1, re;
            re = ua.match( /Opera|OPR\/([0-9]+)\./ );
            if ( null !== re ) {
                rv = parseInt( re[1], 10 ); a.name = 'Opera';
                return rv;
            }
            re = ua.match( /Chrom(e|ium)\/([0-9]+)\./ );
            if ( null !== re ) {
                rv = parseInt( re[2], 10 ); a.name = 'Chrome';
                return rv;
            }
            re = /AppleWebKit\/([\d.]+)/.exec( navigator.userAgent );
            if ( null !== re ) {
                rv = parseFloat( re[1] ); a.name = 'Safari';
                return rv;
            }
            return rv;
        }( this ) : this.type === 'IE' ?/** Whether this browser type is IE (IE version < 9)*/ function ( a ) {
            let rv = -1, re;
            re = new RegExp( "MSIE ([0-9]{1,}[\.0-9]{0,})" );
            return re.exec( ua ) !== null ? ( rv = parseFloat( RegExp.$1 ), a.name = 'IE', rv ) : rv;
        }( this ) : this.type === 'Opera' ?/** Whether this browser type is Opera*/ function ( a ) {
            let rv = -1;
            try {
                rv = navigator.userAgent.match( /Version\/([1-9]+\.[0-9]{2})/ )[1]; a.name = 'Opera';
                return rv;
            } catch ( ex ) {
                return rv;
            }
        }( this ) : /** Undefined browser type define*/ -1;
    }.call( browser );

    window.browser = browser;

}( window ) );

检查你的情况==>

if ( ( browser.name === 'Chrome' && browser.version <= 60 )
    || ( browser.name === 'IE' && browser.version < 11 )
    || ( browser.name === 'Firefox' && browser.version <= 50 ) ) {
    // Not Supported
} else {
    //Supported or Undefined Browser
}