1。 文字一行显示超出省略号显示
display: inline-block;
width: 80%;
white-space: nowrap;
overflow: hidden;
text-overflow:ellipsis;
多行显示
overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 2;//设置显示几行
-webkit-box-orient: vertical;
2。居中定位
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50);
3.实现圆环 (伪类)
<div class="element2"></div>
.element2{
position: absolute;
left: 15%;
top:50%;
display: inline-block;
width: 0.18rem;
height: 0.18rem;
line-height: 0.3rem;
background-color: rgba(255,255,255,0.7);
border-radius: 50%;
transform: translate(0,-50%);
}
.element2:before{
content: "";
display: block;
width: 0.14rem;
height: 0.14rem;
border-radius: 50%;
background-color: #000;
position: relative;
top: 0.02rem;
left: 0.02rem;
}
.element2:after{
content: "";
display: block;
width: 0.1rem;
height: 0.1rem;
border-radius: 50%;
background-color: rgba(255,255,255,0.7);
position: relative;
top: -0.1rem;
left: 0.04rem;
}
4. 画半圆弧
<div class="headerBoxellipse" style="
width: 300px;
height: 30px;
line-height: 100px;
text-align: center;
background-color: rgb(255, 255, 255);
border-radius: 0px 0px 50% 50% / 0px 0px 100% 100%;
transform: rotate(deg);
z-index: 22;
left: 50%;
top: 100px;
transform: translate(-50%, 0);
">
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