Diagonal Textbox border styling by css - html

Question

Can anybody help me styling a textbox border like in image only by css.I have tried the following css but not working perfectly
.addfolder-input {
border: medium none;
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
margin-bottom: 20px;
width: 100%;
padding: 0 10px;
border-top: 0;
border-right: 0;
border-bottom: solid 2px #3c5a9a;
border-left: 0;
border-radius:5px;
}

Answer 1

This is one possible approach by using a container element around the text box and then adding an absolutely positioned pseudo-element to the container which is rotated along the X-axis with a bit of perspective.
Rotating along the X-axis with perspective makes the rectangle look as though it sides are going away from each other as we go from bottom of the rectangle to its top. The top-border of the pseudo-element is nullified as we don't need it.
Whatever width is required for the text-box should be set to the container as both the pseudo-element and the text-box derive their `width (100%) from their container.
.addfolder-input {
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
margin-bottom: 20px;
width: 100%;
padding: 0 10px;
border: none;
outline: none;
}
.container {
position: relative;
width: 100px;
}
.container:after {
position: absolute;
content: '';
bottom: 48%;
left: 6px;
width: 100%;
height: 6px;
border: 2px solid #3c5a9a;
border-top: none;
-webkit-transform: perspective(10px) rotateX(-10deg);
-moz-transform: perspective(10px) rotateX(-10deg);
transform: perspective(10px) rotateX(-10deg);
}
<div class="container">
<input type="text" class="addfolder-input" value="Type Something..."/>
</div>
Here is another alternate using multiple backgrounds, linear-gradients and background positioning. This can also work but in some browsers the angular edges/borders become a bit jagged.
.addfolder-input {
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
margin-bottom: 20px;
width: 85%;
padding: 0 10px;
border: none;
outline: none;
position: relative;
left: 6px;
}
.container {
position: relative;
width: 120px;
}
.container:after {
position: absolute;
content: '';
bottom: 48%;
left: 6px;
width: 100%;
height: 6px;
background: -webkit-linear-gradient(45deg, transparent 9%, #3c5a9a 9%, #3c5a9a 12%, transparent 12%), -webkit-linear-gradient(-45deg, transparent 9%, #3c5a9a 9%, #3c5a9a 12%, transparent 12%), -webkit-linear-gradient(0deg, transparent 9%, #3c5a9a 9%, #3c5a9a 95%, transparent 11%) no-repeat;
background: -moz-linear-gradient(45deg, transparent 9%, #3c5a9a 9%, #3c5a9a 12%, transparent 12%), -moz-linear-gradient(-45deg, transparent 3%, #3c5a9a 3%, #3c5a9a 6%, transparent 6%), -moz-linear-gradient(90deg, transparent 9%, #3c5a9a 9%, #3c5a9a 86%, transparent 86%) no-repeat;
background: linear-gradient(45deg, transparent 9%, #3c5a9a 9%, #3c5a9a 12%, transparent 12%), linear-gradient(-45deg, transparent 3%, #3c5a9a 3%, #3c5a9a 6%, transparent 6%), linear-gradient(90deg, transparent 9%, #3c5a9a 9%, #3c5a9a 86%, transparent 86%) no-repeat;
background-position: 0px 6px, 107px 6px, 0px 4px;
}
<div class="container">
<input type="text" class="addfolder-input" value="Type Something..." />
</div>