Internet Explorer ShellsĪn Internet Explorer shell is a browser which uses the Trident layout engine from Internet Explorer but provides its own user interface framework-the buttons, bars and menus that drive the program. Because of the unstable nature of pre-release software, this book doesn't cover any Internet Explorer 7 CSS quirks or bugs. Some, but not all, known CSS bugs in Internet Explorer 6 are being fixed in the new version. There are a number of bugs and other problems in Internet Explorer, which force it into the category of "quirky browsers." You're going to need to make special provisions for Internet Explorer if you use more complex CSS, such as advanced selectors or CSS for layout.Īt the time of this book's writing, a preview version of Internet Explorer 7 is available for testing.
On the other hand, Internet Explorer is probably the least favorite current browser among designers who use CSS extensively. Microsoft's Internet Explorer 6 is currently the most popular web browser recent browser statistics show that more people use IE than all other browsers combined. Older versions of these browsers are listed as well, with advice on how these browsers will affect your web design practices. The rest of this hour is a snapshot of the major browsers in the first part of 2006 (and some minor browsers), grouped by layout engine. From a CSS designer's perspective, these browsers are all effectively the same as Firefox they display CSS in the same way, and share any quirks and bugs found in Gecko.
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(All layout engines have code-names which are, essentially, arbitrarily chosen and don't really mean anything in particular.) Gecko is an open-source layout engine-meaning that the code used to create the program is available on the Web for anyone to read-and it has been used in other programs, such as the browsers Camino, K-Meleon, and Epiphany, as well as the email program Thunderbird. For example, the layout engine used in Firefox is known by the code-name Gecko. In modern web browsers, the layout engine is modular and can be used by other applications. The layout engine is the primary determinant of whether a browser is broken, quirky, or compliant. This is also where you find browser bugs and quirks that affect CSS usage. The colors, fonts, page layout, and other properties controlled by HTML and CSS are all applied by the layout engine, which presents the page content to the user. The layout engine is the part of the browser program that reads an HTML page and applies the browser's default style rules, the user's personal style sheet (if any), and the style sheets associated with the page being displayed. The true heart of a web browser is its layout engine.
Sams Teach Yourself CSS in 24 Hours, 2nd Editionįrom the perspective of a CSS designer, the most important part of the web browser is not the menu bar, the tabbed window interface, or even the security and privacy features.
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