What improvements does IE7 offer compared to IE6?

Many developers in the web development industry often express frustration when it comes to developing for IE6. But when working with a powerful JavaScript framework such as jQuery, does the process of developing for IE6 differ significantly from that of developing for IE7?

Answer №1

  • Alpha-channel PNGs are displayed accurately.
  • The calculations for box dimensions closely align with industry standards.
  • Rendering and JavaScript performance allow for sophisticated features without causing the user's device to freeze.
  • Several security vulnerabilities have been successfully resolved.

In comparison to its competitors, this browser has shown minimal progress, lagging behind in advancements. It remains the least favorable among major browsers and presents challenges for developers.

Answer №2

One of the great things about IE7 is that it has built-in support for png transparency, making it much easier to keep graphic resources looking top-notch on our website.

Answer №3

Here are a few additional points that have not yet been mentioned:

  1. Strict adherence to CSS width: In IE7 standards compliance mode, the width styles in CSS are strictly interpreted. Unlike in IE6, if a child element has a width greater than its parent element, the parent's declared width is respected and does not expand to accommodate the child. However, this change has introduced some quirks, such as issues with tables inside scrolled DIVs with overflow set to auto or scroll.
  2. Disabling Cleartype with DirectX filters: IE7 disables cleartype for elements with DirectX filters like alpha transparency and gradients. While this prevents blurriness caused by cleartype on elements with filters, it can result in blocky text rendering on LCD monitors.
  3. Fix for SELECT z-index bug: IE7 addressed a bug where SELECT elements always had an infinite z-index, causing them to overlap other elements. This bug fix was particularly beneficial for improving the display of menus.
  4. Enhancements to CSS pseudo-classes: IE7 now supports pseudo-classes like :hover outside of hyperlinks, allowing for more versatile styling options.
  5. Performance considerations: Although IE7 brought improvements in raw JavaScript performance, there were drawbacks in the VML engine and certain DOM methods, making operations like finding offsetLeft and offsetTop slower. Additionally, VML performance in IE8 decreased significantly compared to IE7 in standards compliance mode.

Answer №4

In my opinion, the contrast between IE6 and IE7 is quite significant.

  • IE7 has native XMLHTTP support, while IE6 requires an ActiveX control for this feature.
  • Additional pseudo classes are supported in IE7.
  • Issues with z-order and zoom were addressed in IE7.
  • Some of the box model problems were fixed in IE7.
  • The > child selector is now supported in IE7.
  • Adjacent (+) selectors are now supported in IE7.
  • PNG transparency support was added to IE7.

Answer №5

One of the key areas that received attention in improving IE7 was its performance related to JavaScript and efforts to adhere more closely to CSS standards.

Here are some of the major enhancements that come to mind:

  • The resolution of the double margins bug
  • Addressing numerous issues with the box model and positioning inheritance
  • The incorporation of the Developer Toolbar into the browser (not a mere bug fix, but a significant update for me)
  • Improved handling of PNG files, as mentioned by others

While IE7 represented a vast improvement over IE6, it falls short when compared to other modern browsers available today.

Answer №6

Despite some improvements in IE7's standards compliance, the differences are still quite minimal. All versions of Internet Explorer, including IE8, continue to struggle with JavaScript, CSS, and DOM issues. Many of the workarounds used for IE6 are still relevant for newer versions. However, there is hope on the horizon with IE9 showing promising progress (which is a pleasant surprise).

The discrepancies between IE and other browsers like Firefox and Chrome have narrowed significantly in terms of implementation.

For more insight into the flaws of IE, I recommend checking out Mark Wilton-Jones's article.

Answer №7

JavaScript and CSS frameworks help mitigate the issues caused by IE6, however, there are still lingering bugs and inconsistencies when compared to other browsers.

While IE7 is an improvement over IE6, it still falls short in many aspects.

Answer №8

One of the most frustrating aspects of IE6 is its inability to support PNG transparency, which forces the use of AlphaImageLoader for images. This workaround often leads to additional bugs and limitations, such as the inability for transparent backgrounds to repeat.

Furthermore, users may encounter issues like the notorious double margin bug, a lack of support for min-height and min-width properties, unnecessary line breaks in floated elements, and missing advanced CSS selectors.

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