css implementation of rounded triangles, implementation of rounded triangles

Today I will bring you a solution on how to implement a rounded triangle. Although this solution can be implemented, it is also achieved by means of patchwork. If you want to use a div to implement a rounded triangle, it is still relatively difficult. The previous article talked about how to implement a dialog box , which introduced the implementation of triangles. Today we will talk about how to realize a rounded triangle.

Solution 1: Fully compatible SVG solution

If you want to generate a triangle with rounded corners, the best and least amount of code is to use SVG to generate it.

Use SVG's polygon tag <polygon> to generate a trigonal shape, and use SVG's stroke-linejoin="round" to generate rounded corners at the join.

The amount of code is very small, the core code is as follows:

<svg  width="250" height="250" viewBox="-50 -50 300 300">
  <polygon class="triangle" stroke-linejoin="round" points="100,0 0,200 200,200"/>
</svg>
.triangle {
    fill: #0f0;
    stroke: #0f0;
    stroke-width: 10;
}

Controlling the fillet size through stroke-width So how to control the fillet size? It is also very simple. By controlling the size of stroke-width, you can change the size of the fillet. Of course, to keep the size of the triangle consistent, while increasing/reducing the stroke-width, you need to reduce/increase the width/height of the graphic.

Option 2: Graphic splicing

You can use a square to turn it into a rhombus, and then add rounded corners

div {
    width:  10em;
    height: 10em;
    transform: rotate(-60deg) skewX(-30deg) scale(1, 0.866);
   border-top-right-radius: 30%;
}

Join 3 rhombuses with rounded corners

<style>
div{
    position: relative;
    background-color: orange;
    margin:50px auto;
}
div:before,
div:after {
    content: '';
    position: absolute;
    background-color: inherit;
}
div,
div:before,
div:after {
    width:  10em;
    height: 10em;
    border-top-right-radius: 30%;
}
div {
    transform: rotate(-60deg) skewX(-30deg) scale(1,.866);
}
div:before {
    transform: rotate(-135deg) skewX(-45deg) scale(1.414, .707) translate(0,-50%);
}
div:after {
    transform: rotate(135deg) skewY(-45deg) scale(.707, 1.414) translate(50%);
}
</style>
<div></div>

Put the above code into html and you can see the effect!

Option 3: Graphic splicing to achieve gradient color rounded triangles

The essence is to implement a shell shape, and then implement it through rotation and pseudo-classes. Just make a gradient in the shell shape.

code show as below:

<div></div>
<style>
     div {
    width: 200px;
    height: 200px;
    transform: rotate(30deg) skewY(30deg) scaleX(0.866);
    border-radius: 20%;
    margin-top:70px;
    overflow: hidden;
  border: unset;
}

div::before,
div::after {
    content: "";
    position: absolute;
    width: 200px;
    height: 200px;
}
div::before {
    border-radius: 20% 20% 20% 55%;
    background: #000;
  transform: scaleX(1.155) skewY(-30deg) rotate(-30deg) translateY(-42.3%) skewX(30deg) scaleY(0.866) translateX(-24%);
}
div::after {
    border-radius: 20% 20% 55% 20%;
    background: #000;
  transform: scaleX(1.155) skewY(-30deg) rotate(-30deg) translateY(-42.3%) skewX(-30deg) scaleY(0.866) translateX(24%);
}

div::before,
div::after {
    background: linear-gradient(#0f0, #03a9f4);
}
</style>

Directly put the above code into html and you can see the effect!