Check if IE8 with pure Javascript [duplicate]

问题

This question already has answers here:

Detect IE version (prior to v9) in JavaScript (37 answers)

Closed 5 years ago.

I used to check it this way:

$.browser.msie && $.browser.version == 8

But it seems that $.browser has been removed from the later versinos of jQuery,

So,

How can I check that with just pure javascript?

I tried:

isIE8: navigator.appVersion.indexOf("MSIE 8") > 0

Wich seems to Do it, but it doesn't look that good and actually looks like it have many flaws...

Any better aproach?

回答1:

This is longer than the one-liner you probably want, but safer than parsing the UA string, because it's based on actual behaviour (IE conditional comments): https://gist.github.com/paulirish/357741

回答2:

You could check if the SVG tag is supported. SVG was not supported in IE8 -> http://caniuse.com/#search=svg To the opposit, the DATA tag was introduced in IE8 -> http://caniuse.com/#search=data

So :

if (navigator.userAgent.toLowerCase().indexOf('msie') != -1) {
   if (!document.createElement('SVG').getAttributeNS) {
       if (document.createElement('DATA').getAttributeNS) {
           //the browser is defently IE8
        }
    }
}

来源：https://stackoverflow.com/questions/21855378/check-if-ie8-with-pure-javascript