![]() ![]() IE 6, 7 and 8 did not support application/xhtml+xml. The specification-wise correct treatment for XML documents to the extent In Firefox, Safari, Chrome, Opera and IE9, the application/xhtml+xml HTTPĭoctype!) triggers the XML mode. The Mode for application/xhtml+xml Content (XML Mode) Still, you should use the Standards mode-not the Almost Standard mode. ![]() In retrospect, the Web would have been better off by not having the distinction between Standards and Almost Standards, having the Almost Standards behavior as the default and having a CSS property for opting into the behavior that is the default in the Standards mode. The Almost Standards mode than to the Standards mode of newer browsers. In fact, their Standards modes are closer to Mode, because they didn’t implement the vertical sizing of table cells according to the CSS2 specification in their respective Mac IE 5, Windows IE 6 and 7, Opera prior to 7.5 and Konqueror did not need an Traditionally and not according to the CSS2 specification. Standards mode”, which implements the vertical sizing of table cells Almost Standards Modeįirefox, Safari, Chrome, Edge, Opera (since 7.5), IE8, IE9, IE10, and IE11 Since different browsers are at different stages ofĬompliance, the Standards mode isn’t a single target, either. The specification-wise correct treatment to the extent implemented in a In the Standards mode the browsers try to give documents You are authoring new page, don’t use the Quirks mode. ![]() The primary Quirks modes of IE10 and IE11 that are like the Quirks modes of other browsers are sometimes referred to as the “interoperable Quirks mode” to distinguish it from the IE 5.5-imitating “Internet Explorer 5 Quirks” mode that IE10 and IE11 also have. The interoperable quirks are being standardized at the WHATWG. Most notably, the primary Quirks mode of IE10 and IE11 is no longer an imitation of IE 5.5 but seeks to be interoperable with Quirks modes of other browsers. Recently, browsers have been converging on common behavior in their Quirks modes. In particular, in Internet Explorer 6, 7, 8 and 9, the Quirks mode isĮffectively frozen IE 5.5, while in other browsers the Quirks mode has been a handful ofĭeviations from the Almost Standards mode. Previously, different browsers implementedĭifferent quirks. In order to avoid “breaking” pages authored according to practices In the Quirks mode the browsers violate Web format specifications Additionally, there are other factors involved even with IE6 and IE7 if Google Chrome Frame has been installed. However, by default even in IE8 and later, the mode depends on the doctype for non-intranet sites that are not on an exception list supplied by Microsoft. In IE8 through and including IE11, but not in Microsoft Edge, the mode also depends on other factors. The choice of the mode for text/html content depends on doctype sniffing ( discussed later in this document). Here are the various modes: Common Modes for text/html Content The purpose of this document is not to facilitate cherry-picking behaviors by deliberately choosing legacy modes. The purpose of this document is to give you information on how to avoid the legacy modes and enough research to be convincing. This document focuses on the mode selection mechanism and does not document Instead of referring to the names of browser engines, the names of the best-known browsers using each engine are used instead. This document covers mode switching as it applies to Firefox and other Gecko-based browsers, Safari and other WebKit-based browsers, Chrome, new Edge, Opera, and other Chromium-based browser, Konqueror, Internet Explorer for Mac, Internet Explorer for Windows (including Windows Phone) and browsers that embed IE, and EgdeHTML-based Edge. (Read on for exceptions.) The Scope of This Document However, the default behavior of IE versions even prior to 11 is reasonable in most cases, and IE11 no longer put the Compatibility View button in the toolbar, so you don’t really need to jump through these IE-specific hoops. If you want to take extra care to make sure that users of IE8, IE9 or IE10 cannot press a button that makes your site regress as if it was being viewed in IE7, either configure your server to send the HTTP header X-UA-Compatible: IE=Edge for text/html or put in the head of your HTML documents (before any scripts). anything that gets served as text/html) with as the first thing in the source. The main conclusion to draw from this article is that you should start all your HTML documents (i.e. ![]()
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