Question

I have such design element. How to create it on page? My first guess was to create triangle image and add it to right side of my element like this:

.profile-menu :hover
{
    background-color: #50BBFF;
    background-image: url("/Images/menu-triangle.png") ;
    background-position: right center; 
    background-repeat: no-repeat; 
    background-position: 145px 15px;
}

But the problem here is that triangle hides after it passes element’s border. z-index doesnt help here. I know that there sure are several ways to achieve that, but cant find the one.

Answer 1

You actually could do this with just background images using CSS3’s multiple background images.

I put an example together yesterday which you can see here. If you know the dimensions of your box you could use this method.

http://jsfiddle.net/spacebeers/T8Yzj/39/

.box3 {
    z-index: 100;
    border: none;
    padding: 10px 0 30px 0;    
    background-image: url("http://test.mark-design.co.uk/4ik4e7ic.png"), url('http://test.mark-design.co.uk/line.png');
    background-position: 50% -1px, left top;
    background-repeat: no-repeat, repeat-x;
}

EDIT:

You can also do exactly what you want without ANY images – http://jsfiddle.net/spacebeers/T8Yzj/55/

.box2 {
    width: 100px;
    height: 50px;
    background: red;
    color: white;
    position:relative
}

.box2:after {
    content: "";
    position:absolute;
    width: 0;
    height: 0;
    bottom: 25%;
    left:100px;
    border-left: 10px solid #000;
    border-right: 10px solid transparent;   
    border-bottom: 10px solid transparent;    
    border-top: 10px solid transparent;
}