Can an element have two different styles with different colors?
In simpler terms, imagine I have the following HTML code:
<table class='my_table'>
<th class="style1 style2">LastName</th>
...
</table>
and this CSS:
.my_table th.style1 {
background: #aaaaaa;
}
.my_table th.style2 {
background: #bbbbbb;
}
I know I can remove one style using JavaScript under certain conditions. But is it possible to have two conflicting styles where one overrides the other?
A variety of classes can be applied to an element in CSS. The order in which the classes are declared, as well as the specificity of the selectors, determine which styles will take precedence.
For instance, if two classes have the same level of specificity, the one declared last will be used:
.style1 {
background: #aaaaaa;
}
.style2 {
background: #bbbbbb;
}
If one selector is more specific than the other, the most specific one will be applied (as shown in the example below):
.my_table th.style1 {
background: #aaaaaa;
}
.style2 {
background: #bbbbbb;
}
To address your inquiry, it is important to note that the styles defined last (excluding those in your class attribute) will take precedence on your element. However, if the !important keyword was used at any point, the outcome may appear quite unusual to you.
A single element can have multiple classes assigned to it, and all the styling rules from those classes will be applied.
When there are conflicting rules, the most specific rule takes precedence. If rules have equal specificity, the last rule in the stylesheet will be used.
For example:
<table class="my_table">
<tr>
<th class="style1">Style 1</th>
<th class="style2">Style 2</th>
<th class="style1 style2">Style 1 and 2</th>
</tr>
</table>
In this case, the background of the third cell will be based on the rules in style2, since it was defined later in the stylesheet.
Check out a live demo here: http://jsfiddle.net/jsLP5/
Absolutely, it is possible to assign multiple classes to a single element. In cases where conflicting CSS rules exist for the same element, one will take precedence over the other.
There is no limit to the number of style definitions you can have, either in general or for a specific element. The one that is applied depends on the css specificity (scope). If you want to learn more about this, check out:
absolutely, you have the ability
<th class="format1 format2">Surname</th>
and you own the styling exactly as detailed here
In this code snippet, the background color #bbbbbb is chosen due to the cascade rules in CSS. The order of declarations determines which styles take precedence, regardless of the sequence of class names in the attribute.
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