Css Shape Creation Curved Wave - html

Question

This is what i have got so far
After after checking out tutorial
I want know how curved effect is generated on divs the only question that i found near to what i was looking for was At here at stackoverlow but that too dint help
How folded edge effect is created on as in the above picture
Css
#MenuShape{
height:50px;
background-color:orange;
width:200px;
position:relative;
text-align:center;
left:100px;
}
#MenuShape:after{
content:"";
position: absolute;
width: 0;
height: 0;
left:200px;
border-top: 50px solid transparent;
border-left: 100px solid orange;
border-bottom: 0px solid transparent;
}
#MenuShape:before{
content:"";
position: absolute;
width: 0;
height: -50;
left:-100px;
border-top: 50px solid transparent;
border-right: 100px solid orange;
border-bottom: 0px solid transparent;
}
HTML
<div id="MenuShape" >
sachin
</div>
https://css-tricks.com/ this the site on inspecting it i found its span wrapped
anchor tag along with svg tag
<a href="/" class="home">
<svg viewBox="0 0 100 25" class="shape-tab">
<use xlink:href="#shape-tab"></use>
</svg>
<span>Blog</span></a>
Click here to see the unexpected behaviour it works fine in codepen

Answer 1

Here is a final demo (archived) on the folded corners:
and the following code is how you can create them:
.note {
position: relative;
width: 30%;
padding: 1em 1.5em;
margin: 2em auto;
color: #fff;
background: #97C02F;
overflow: hidden;
}
.note:before {
content: "";
position: absolute;
top: 0;
right: 0;
border-width: 0 16px 16px 0;
border-style: solid;
border-color: #fff #fff #658E15 #658E15;
background: #658E15;
-webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, 0.3), -1px 1px 1px rgba(0, 0, 0, 0.2);
-moz-box-shadow: 0 1px 1px rgba(0, 0, 0, 0.3), -1px 1px 1px rgba(0, 0, 0, 0.2);
box-shadow: 0 1px 1px rgba(0, 0, 0, 0.3), -1px 1px 1px rgba(0, 0, 0, 0.2);
/* Firefox 3.0 damage limitation */
display: block;
width: 0;
}
.note.rounded {
-moz-border-radius: 5px 0 5px 5px;
border-radius: 5px 0 5px 5px;
}
.note.rounded:before {
border-width: 8px;
border-color: #fff #fff transparent transparent;
-moz-border-radius: 0 0 0 5px;
border-radius: 0 0 0 5px;
}
<div class="note"></div>
To create a curved wave effect you can use this code:
#wave {
position: relative;
height: 70px;
width: 600px;
background: #e0efe3;
}
#wave:before {
content: "";
display: block;
position: absolute;
border-radius: 100% 50%;
width: 340px;
height: 80px;
background-color: white;
right: -5px;
top: 40px;
}
#wave:after {
content: "";
display: block;
position: absolute;
border-radius: 100% 50%;
width: 300px;
height: 70px;
background-color: #e0efe3;
left: 0;
top: 27px;
}
<div id="wave"></div>
To achieve the curve you’ll need to inverse where it starts. Follow the same demo, just reverse your values.
See a live demonstration (archived) of how border radius can create the shapes and effects you want and adjust each corner to see it in action.