How Can I Detect Internet Explorer Users in My JavaScript Code?

Determine the Presence of Internet Explorer Users in a Function

In the code snippet you provided, you are seeking a mechanism to identify users browsing with Internet Explorer (IE) and execute a specific function only for those users. Let's explore this further.

Determining the Browser Type

In the earliest versions of IE, the browser's user agent string uniquely identified it. However, with the advent of Edge, which utilizes Chromium as its rendering engine, this approach may not be as effective.

Updated Approach

A more reliable approach is to check for the presence of window.document.documentMode, which is a property specific to IE versions 8 or higher. If this property exists, the user is likely browsing with IE:

if (window.document.documentMode) {
    // Execute function for IE users
}

Additional Considerations

It's important to note that this approach will not distinguish between IE and Edge. If you need to specifically identify Edge, you can utilize the navigator.userAgent property and parse it to determine the browser version.

Example Usage

Here is an example that checks for IE and Edge and executes a function accordingly:

function checkBrowser() {
    if (window.document.documentMode) {
        // Execute function for IE users
    } else if (navigator.userAgent.indexOf("Edge") > -1) {
        // Execute function for Edge users
    }
}

checkBrowser();

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