Question

99

Force browser update if IE8 or older

rated 0 times [ 103] [ 4] / answers: 1 / hits: 18592 / 12 Years ago, fri, april 6, 2012, 12:00:00

I wonder if it's possible to show a warning or open a pop-up, which would say update your IE to latest version or use Firefox / Chrome / Safari instead, when browser is Internet Explorer IE8 or older...

I guess I should use that code below inside the tags...

<!--[if lt IE 9]>

...i should use code here...

<![endif]-->

Is it smart to deceted browser with jQuery and loading jQuery lib? Or is it better to just use regular javascript in order to avoid additional issues with very old browsers?

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yisroels

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1 Year ago

answered 12 Years ago isham · Accepted Answer

You have two options:

Parse the the User-Agent String

// Returns the version of Internet Explorer or a -1

// (indicating the use of another browser).

function getInternetExplorerVersion() {

    var rv = -1; // Return value assumes failure.



    if (navigator.appName == 'Microsoft Internet Explorer') {

        var ua = navigator.userAgent;

        var re  = new RegExp(MSIE ([0-9]{1,}[.0-9]{0,}));



        if (re.exec(ua) != null) {

            rv = parseFloat( RegExp.$1 );

        }

    }



    return rv;

}



function checkVersion() {

    var msg = You're not using Internet Explorer.;

    var ver = getInternetExplorerVersion();



    if ( ver > -1 ) {

        if ( ver >= 9.0 ) {

            msg = You're using a recent copy of Internet Explorer.

        }

        else {

            msg = You should upgrade your copy of Internet Explorer.;

        }

    }

    alert(msg);

}

Using Conditional Comments:

<!--[if gte IE 9]>

<p>You're using a recent version of Internet Explorer.</p>

<![endif]-->



<!--[if lt IE 8]>

<p>Hm. You should upgrade your copy of Internet Explorer.</p>

<![endif]-->



<![if !IE]>

<p>You're not using Internet Explorer.</p>

<![endif]>

Reference: Detecting Windows Internet Explorer More Effectively