仅具有CSS的饼图百分比

Question

我已经找到了非常不错的“百分比饼图”，并且只想使用CSS创建它。不需要动画。只是静态的“图片”。

我了解，如果我想创建这种图表，则需要使用此类元素

问题是

1. 如何创建元素2？
2. 如何针对较小（5％）或较高百分比（80％）的值来管理2号元素的形状？

Answer 1

使用新的conic gradient，可以通过一个div来对其进行管理，该div刚刚作为实验属性进入了Chrome。

结果图片

:root {
  --size: 100px;
  --bord: 10px;
}

.chart {
  width: var(--size);
  height: var(--size);
  margin: 1em auto;
  border-radius: 50%;
  background-image: conic-gradient(lightseagreen var(--value), lightgrey var(--value));
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.chart::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: calc(100% - var(--bord));
  height: calc(100% - var(--bord));
  background: white;
  border-radius: inherit;
}

p {
  position: relative;
  z-index: 1;
  font-size: 2em;
}

.x-60 {
  --value: 60%;
}

.x-20 {
  --value: 20%;
}

<div class="chart x-60">
  <p>60%</p>
</div>

<div class="chart x-20">
  <p>20%</p>
</div>

感谢Temani Afif，可以在不使用伪元素的情况下使用边框并利用background-clip ...

 background: 
    linear-gradient(white,white) padding-box,
    conic-gradient(lightseagreen var(--value), lightgrey var(--value)) border-box;

:root {
  --size: 100px;
  --bord: 10px;
}

.chart {
  width: var(--size);
  height: var(--size);
  margin: 1em auto;
  border: var(--bord) solid transparent;
  border-radius: 50%;
  background: linear-gradient(white, white) padding-box, conic-gradient(lightseagreen var(--value), lightgrey var(--value)) border-box;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2em;
}

.x-60 {
  --value: 60%;
}

.x-20 {
  --value: 20%;
}

<div class="chart x-60">
  <p>60%</p>
</div>

<div class="chart x-20">
  <p>20%</p>
</div>

Answer 2

您可以在多个背景下进行此操作。

从0%到50%：

.box {
  width: 100px;
  height: 100px;
  display: inline-block;
  border-radius: 50%;
  border: 5px solid transparent;
  background: 
    linear-gradient(#ccc, #ccc) padding-box, 
    linear-gradient(var(--v), #f2f2f2 50%, transparent 0) border-box,
    linear-gradient(to right, #f2f2f2 50%, blue 0) border-box;
}

<div class="box" style="--v:-90deg"></div><!-- 0% -->
<div class="box" style="--v:-45deg"></div><!-- 12.5% -->
<div class="box" style="--v:  0deg"></div><!-- 25% -->
<div class="box" style="--v: 45deg"></div><!-- 37.5% -->
<div class="box" style="--v: 90deg"></div><!-- 50% -->

<p>The formula is [p = (18/5) * x - 90]. <small>Where x is the percentage and p the degree</small></p>
<p>for x = 5% --> p = -72deg </p>
<div class="box" style="--v:-72deg"></div>

从50%到100%：

.box {
  width:100px;
  height:100px;
  display:inline-block;
  border-radius:50%;
  border:5px solid transparent;
  background:
    linear-gradient(#ccc,#ccc) padding-box,
    linear-gradient(var(--v), blue 50%,transparent 0) border-box,
    linear-gradient(to right, #f2f2f2 50%,blue 0) border-box;
}

<div class="box" style="--v:-90deg"></div><!-- 50% -->
<div class="box" style="--v:-45deg"></div><!-- 62.5% -->
<div class="box" style="--v:  0deg"></div><!-- 75% -->
<div class="box" style="--v: 45deg"></div><!-- 87.5% -->
<div class="box" style="--v: 90deg"></div><!-- 100% -->

<p>The formula is [p = (18/5) * x - 270]. <small>Where x is the percentage and p the degree</small></p>
<p>for x = 80% --> p = 18deg </p>
<div class="box" style="--v:18deg"></div>

您可以像这样组合两者：

.box {
  width:100px;
  height:100px;
  display:inline-block;
  border-radius:50%;
  border:5px solid transparent;
  background:
    linear-gradient(#ccc,#ccc) padding-box,
    linear-gradient(var(--v), #f2f2f2 50%,transparent 0) center/calc(var(--s)*100%) border-box,
    linear-gradient(var(--v), blue 50%,transparent 0) center/calc(100% - var(--s)*100%) border-box,
    linear-gradient(to right, #f2f2f2 50%,blue 0) border-box;
}

<div class="box" style="--v:-90deg;--s:1"></div>
<div class="box" style="--v:0deg;--s:1"></div>
<div class="box" style="--v:90deg;--s:1"></div>
<div class="box" style="--v:0deg;--s:0"></div>
<div class="box" style="--v:90deg;--s:0"></div>

Answer 3

嘿，您可以添加小的CSS样式

.circle {
  position: relative;
  top: 5px;
  left: 5px;
  text-align: center;
  width: 100px;
  height: 100px;
  border-radius: 100%;
  background-color: #ffffff;
}

.circle-border {
  position: relative;
  text-align: center;
  width: 110px;
  height: 110px;
  margin-left: 30%;
  border-radius: 100%;
  background-color: #E53B3B;
  background: linear-gradient(0deg, lightgray 100%, black 0%)
}

HTML

<div class="circle-border" id="circleElement">
  <div class="circle" id="circleElementValue">
    aaa
  </div>
</div>

JS：自动显示填充百分比

// let i = 75;
//   let deg=Math.round(1.8*i); 
//   let completed=0;
//   let remaining=100-i;
//   // completed = (remaining>50)? 50 : completed;
// let backgroundStlye = 'linear-gradient('+deg+'deg, lightgray '+remaining +'%, black '+completed + '%)';
//   setTimeout(function(){
//     console.log(backgroundStlye);
//   document.getElementById("circleElement").style.background =backgroundStlye;
// },i*100);

for(let i=1;i<=100;i++){
  let deg=Math.round(1.8*i); 
  let completed=i;
  let remaining=100-i;
  completed = (remaining<50)? 0 : completed;
let backgroundStlye = 'linear-gradient('+deg+'deg, lightgray '+remaining +'%, black '+completed + '%)';
  setTimeout(function(){
    console.log(backgroundStlye);
  document.getElementById("circleElement").style.background =backgroundStlye;
    document.getElementById("circleElementValue").innerHTML = i+'%';
},i*100);
}

我创建了示例https://codepen.io/arun-b-shet/pen/mdVVWXo

希望你喜欢yyyyyyyyyy