The hierarchy of CSS cascading influence

Looking for some help with styling HTML:

<div id="menubar">
    <menu id="menubarTransportControls">Foobar</menu>
</div>

Curious why this CSS rule...

#menubar menu {
    width: auto;
}

...is overriding...

#menubarTransportControls {
    width: 100%;
}

Using IE7 with the HTML5 shiv javascript. Appreciate any tips!

Answer №2

The reason is that the selector #menubar menu holds more specificity compared to #menubarTransportControls.

To learn more about this topic, visit

Answer №3

The key factor here is the priory. Within css, id holds more power compared to class & element.

id=100

class=10
element=1

In your specific example:

#menubar menu = 100 + 1 = 101

&

#menubarTransportControls = 100 = 100 

So which one carries more weight? To delve further into this topic, you can visit http://code.google.com/edu/submissions/html-css-javascript/ (CSS Presentation)

Answer №4

The #menubar menu directly references the menu tag, giving it higher precedence in styling.

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