Ie11 Apr 2026

Today, IE11 exists only as inside Edge—a museum piece carefully isolated from the open web. Its retirement marked the end of the first browser war and the beginning of the Chromium monoculture.

1. Introduction: The Beginning of the End Internet Explorer 11 (IE11) was the final version of Microsoft’s long-running Internet Explorer web browser. Released on October 17, 2013 for Windows 8.1, and later for Windows 7 SP1 and Windows Server 2012 R2, IE11 was not designed to be a competitive, modern browser. Instead, it was a maintenance release —a "niche compatibility solution" built to ease the transition from Microsoft’s legacy web platform to its modern successor, Microsoft Edge. Today, IE11 exists only as inside Edge—a museum

const isIE11 = !!window.MSInputMethodContext && !!document.documentMode; In CSS: Introduction: The Beginning of the End Internet Explorer

A necessary evil that overstayed its welcome by nearly a decade. Last updated: 2026. IE11 usage is now below 0.1% globally, effectively extinct. const isIE11 =

@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) { /* IE10+ CSS hacks go here */ } Internet Explorer 11 was not a bad browser for 2013. It was fast, relatively secure, and far better than IE6–IE9. But Microsoft’s decision to freeze its development and treat it as a "legacy shell" while the web exploded with new APIs, frameworks, and performance expectations turned IE11 into an anchor.