Check for IE 10 [duplicate]

Question

How can I make a message box appear on page load if the user is using IE 10?

function ieMessage() {
    alert("Hello you are using I.E.10");
}

My webpage is a JSF facelet (XHTML).

Answer 1

The real way to detect this, without conditional comments and without User Agent sniffing is with conditional compilation:

<script type="text/javascript">
    var isIE10 = false;
    /*@cc_on
        if (/^10/.test(@_jscript_version)) {
            isIE10 = true;
        }
    @*/
    console.log(isIE10);
</script>

After running this code, you can use following anytime after:

if (isIE10) {
    // Using Internet Explorer 10
}

Reference: How can I detect IE10 from JS when browser mode is IE9?

---

UPDATE:

To avoid minification of comments, you can use something like:

var IE = (function () {
    "use strict";

    var ret, isTheBrowser,
        actualVersion,
        jscriptMap, jscriptVersion;

    isTheBrowser = false;
    jscriptMap = {
        "5.5": "5.5",
        "5.6": "6",
        "5.7": "7",
        "5.8": "8",
        "9": "9",
        "10": "10"
    };
    jscriptVersion = new Function("/*@cc_on return @_jscript_version; @*/")();

    if (jscriptVersion !== undefined) {
        isTheBrowser = true;
        actualVersion = jscriptMap[jscriptVersion];
    }

    ret = {
        isTheBrowser: isTheBrowser,
        actualVersion: actualVersion
    };

    return ret;
}());

And access the properties like IE.isTheBrowser and IE.actualVersion (which is translated from internal values of JScript versions).

Answer 2

In general, the practice of User Agent sniffing and conditional compilation/comments are best avoided. It is far better to use feature detection, graceful degradation , and progressive enhancement instead. However, for the few edge cases where it is more convenient for the developer to detect the browser version, you can use the following code snippets:

This if statement will only execute on IE 10

// IF THE BROWSER IS INTERNET EXPLORER 10
if (navigator.appVersion.indexOf("MSIE 10") !== -1)
{
    window.alert('This is IE 10');
}

This if statement will only execute on IE 11

// IF THE BROWSER IS INTERNET EXPLORER 11
var UAString = navigator.userAgent;
if (UAString.indexOf("Trident") !== -1 && UAString.indexOf("rv:11") !== -1)
{
    window.alert('This is IE 11');
}

http://jsfiddle.net/Qz97n/

Answer 3

Here's a method for getting the current IE or the IE Version:

function IE(v) {
  return RegExp('msie' + (!isNaN(v)?('\\s'+v):''), 'i').test(navigator.userAgent);
}

Here's how you can use it:

if(IE())   alert('Internet Explorer!');
if(IE(10)) alert('Internet Explorer 10!');