Why does IE return medium and FF return 0px when there is no border in response to the following query?
.css("border-left-width")
I tested this in FF 3.6.3 and IE 6/7.
Why does IE return medium and FF return 0px when there is no border in response to the following query?
.css("border-left-width")
I tested this in FF 3.6.3 and IE 6/7.
When using the css() method to retrieve stylesheet-applied styles, the behavior can vary between different browsers.
In Internet Explorer, the values are obtained from the IE-specific currentStyle object, which is the exclusive way to access this information. The currentStyle provides the 'specified style', reflecting exactly what was written in the stylesheet. If no overrides have been applied, the initial value of `border-width` defaults to 'medium', and that's the returned value.
On other web browsers, the css() method utilizes the standard DOM Level 2 CSS function getComputedStyle(). Unlike IE’s currentStyle, this function provides the 'computed style', where relative units like 'medium' are resolved to actual lengths.
While 'medium' typically translates to a length of around 3px, the absence of a visible border on the element causes it to default to border-style: none, resulting in a computed border-width of zero.
Although the 'specified style' and 'computed style' are generally similar enough for most purposes, they do have their distinctions. jQuery's css() method operates under the assumption that they can be treated interchangeably, but in reality, there are subtle differences between them.
It seems that the current display is utilizing the default settings of the browsers. In cases where no specific border is defined, each browser will apply its own default. For example, Internet Explorer (IE) may display a medium border automatically once a border-style is added, while Firefox (FF) might not show any border as its default width is set to 0.
When creating a web design, it's important to always reset all elements to a default setting to ensure consistency across different browsers.
Integrate the YUI Reset package into your css to maintain fluidity of values across all browsers.
http://developer.yahoo.com/yui/reset/
By doing this, when you retrieve the value of a css element, they will all have the same starting point unless modified by another jQuery instance prior to your inquiry.
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