Hollow arrow in front of an image

Question

I'm trying to create a hollow css arrow in front of an image.

I got it… but it feels very dirty. Is there any better way to do this? Cross browser compatibility (IE8+) would be awesome.

SCSS

.arrowwrap {
    width:100%;
    padding:0;
    position:relative;
    overflow:hidden;
    margin:-$arrow_height 0 0 0;
    &:after {
        content:'';
        position:absolute;
        height:$arrow_height;
        width:50%;
        margin:-$arrow_height 0 0 -$arrow_width;
        left:0;
        z-index:99999;
        background:$box_color;
    }
    &:before {
        content:'';
        position:absolute;
        height:$arrow_height;
        width:100%;
        left:50%;
        margin:0 0 0 $arrow_width;
        z-index:99999;
        background:$box_color;
    }
    .arrowone {
        width: 0;
        height: 0;
        border-style: solid;
        border-width: $arrow_height $arrow_width 0 $arrow_width;
        /* border-color: transparent transparent #333 transparent; */
        border-color:transparent $box_color $box_color $box_color;
        margin:auto;
    }
}

http://jsfiddle.net/dhs2eba2/

Answer 1

If you want to minimise and remove all unsemantic markup you can do :

DEMO

This technique relies on pseudo elements and therefore prevents the use of unsemantic markup. Pseudo elements are supported by IE8+ see canIuse. It also needs the box-sizing property to enable responsive width (box-sizing: border-box is also supported by IE8+ see canIuse).

HTML :

<div class="wrap">
    <img src="http://placekitten.com/800/350" />
    <article>
        <h1>Hellow World, meow</h1>
    </article>
</div>

CSS :

body {
    background:#fad;
    padding:0;
    margin:0;
}

$arrow_width: 20px;
$arrow_height: 20px;
$box_color: #d3d030;

.wrap {
    img {
        width:100%;
        height:auto;
        vertical-align:bottom;
    }
    article{
        padding:20px;
        background:$box_color;
        color:#fff;
        position:relative;
    }
}
article:before, article:after{
    content:'';
    position:absolute;
    width:50%;
    bottom:100%;
    box-sizing:border-box;
}
article:before{
    left:0;
    border-bottom:20px solid #D3D030;
    border-right:20px solid transparent;
}
article:after{
    right:0;
    border-bottom:20px solid #D3D030;
    border-left:20px solid transparent;
}