[CSS] 畫一個圓，並使圓中的字置中顯示

HTML

<div class="circle">
  <h3>Hello</h3>
</div>

CSS

.circle {
  position:relative;
  width: 10vw;
  height: 10vw;
  border-radius:50%;
  background:gold;
}
.circle h3 {
  position:absolute;
  top:50%; 
  left:50%;
  transform: translate(-50%, -50%);
  margin:0;
}

---

Source

☞ Responsive circle with centered content
☞ Absolute Centering in CSS