How to make a gradient div in the shape of a trapezoid? - css

Question

I'm trying to make this image I found on Dribbble using Codepen.
I've made the bike, but I can't get the light.
I've tried several times using overflow:hidden and it isn't working.
Do you have an idea of how to do this?
What I'm trying to do is :
web here

Answer 1

Use triangles instead of a trapezium. You can cover the tip of said triangle with the light.
Tweak the numbers, but here's the general idea: http://jsfiddle.net/cZQmH/ http://jsfiddle.net/cZQmH/1/ (added browser compatibility)
<div class="light">
<div class="top triangle"></div>
<div class="bottom triangle"></div>
</div>
Where each "triangle" is actually just covering up the corner
.light { /* Just a big box. Where the magic happens*/
padding:50px 0px;
position: absolute;
background: -webkit-linear-gradient(left, rgba(255,255,255,1),rgba(255,255,255,1), rgba(255,255,0,0)); /* should add other compatibility things */
height: 75px;
width:200px;
}
.triangle {
width: 50px;
position: absolute;
left: 0;
}
.top { /*Covers top corner*/
top:0;
border-top: 100px solid #ff0;
border-right: 100px solid transparent;
}
.bottom { /* Covers bottom corner */
bottom:0;
border-bottom: 100px solid #ff0;
border-right: 100px solid transparent;
}
The final CSS is a bit verbose, but if you're using LESS or SASS it should come out pretty cleanly.
What it comes down to is not using the border itself, but using a gradient negative image. You could experiment with the border-image it's just as well supported as Gradients but I came up with this solution first. It does look like it's possible however
Also: could you post a link to the completed bike? I'd be curious to see how you handle all of those curves.

Answer 2

html
<div class="light">
<div id="trapezoid"></div>
<div id="trapezoid-two"></div>
</div>
css
.light{
background-color: yellow;
width: 400px;
height: 200px;
}
#trapezoid {
top: 50px;
left: 150px;
position: absolute;
border-top: 40px solid transparent;
border-bottom: 40px solid transparent;
height: 16px;
border-right-width: 160px;
border-right-style: dashed;
border-right-color: white;
}
#trapezoid:before {
content: '';
position: absolute;
width: 40px;
height: 10px;
-webkit-box-shadow: 3px 0 130px 80px white;
left: 160px;
border-radius: 50px;
background-color: white;
}
#trapezoid-two{
top: 60px;
left: 200px;
position: absolute;
border-top: 35px solid transparent;
border-bottom: 35px solid transparent;
height: 6px;
border-right-width: 160px;
border-right-style: solid;
border-right-color: white;
}