1. 平滑加载
<div class="progress-1"></div>
.progress-1 {
width:120px;
height:20px;
background:
linear-gradient(#000 0 0) 0/0% no-repeat
#ddd;
animation:p1 2s infinite linear;
}
@keyframes p1 {
100% {background-size:100%}
}
- linear-gradient(#000 0 0) 你可以理解为 linear-gradient(#000 0 100%)，如果还不熟悉，复制 linear-gradient(#000 0 50%, #f00 50% 0) ，替换原先的部分跑一下。觉得 linear-gradient(#000 0 0) 别扭的话，直接写 #000 即可。
- 0/0% 是 background-position: 0;/background-size: 0; 的简写。
2. 按步加载
<div class="progress-2"></div>
.progress-2 {
width:120px;
height:20px;
border-radius: 20px;
background:
linear-gradient(orange 0 0) 0/0% no-repeat
lightblue;
animation:p2 2s infinite steps(10);
}
@keyframes p2 {
100% {background-size:110%}
}
- steps(10) 是 step(10, end) 的简写，指明刚开始没有，所以有第2点的处理
- 100% {background-size:110%} 添加多一个 step 的百分比，上面的 step 是 10，所以是100% + (1/10)*100% = 110%
3. 条纹加载
<div class="progress-3"></div>
.progress-3 {
width:120px;
height:20px;
border-radius: 20px;
background:
repeating-linear-gradient(135deg,#f03355 0 10px,#ffa516 0 20px) 0/0% no-repeat,
repeating-linear-gradient(135deg,#ddd 0 10px,#eee 0 20px) 0/100%;
animation:p3 2s infinite;
}
@keyframes p3 {
100% {background-size:100%}
}
- repeating-linear-gradient(135deg,#ddd 0 10px,#eee 0 20px) 0/100%; 画出灰色的斑马线条纹，repeating-linear-gradient(135deg,#f03355 0 10px,#ffa516 0 20px) 0/0% no-repeat 则是进度条加载的条纹。
4. 虚线加载
<div class="progress-4"></div>
.progress-4 {
width:120px;
height:20px;
-webkit-mask:linear-gradient(90deg,#000 70%,#0000 0) 0/20%;
background:
linear-gradient(#000 0 0) 0/0% no-repeat
#ddd;
animation:p4 2s infinite steps(6);
}
@keyframes p4 {
100% {background-size:120%}
}
5. 电池加载
<div class="progress-5"></div>
.progress-5 {
width:80px;
height:40px;
border:2px solid #000;
padding:3px;
background:
repeating-linear-gradient(90deg,#000 0 10px,#0000 0 16px)
0/0% no-repeat content-box content-box;
position: relative;
animation:p5 2s infinite steps(6);
}
.progress-5::before {
content:"";
position: absolute;
top: 50%;
left:100%;
transform: translateY(-50%);
width:10px;
height: 10px;
border: 2px solid #000;
}
@keyframes p5 {
100% {background-size:120%}
}
6. 内嵌加载
<div class="progress-6"></div>
.progress-6 {
width:120px;
height:22px;
border-radius: 20px;
color: #514b82;
border:2px solid;
position: relative;
}
.progress-6::before {
content:"";
position: absolute;
margin:2px;
inset:0 100% 0 0;
border-radius: inherit;
background: #514b82;
animation:p6 2s infinite;
}
@keyframes p6 {
100% {inset:0}
}
- inset:0 100% 0 0; 右边内缩 100%，所以在 keyframes 部分需要将 inset 设置为 0。
7. 珠链加载
<div class="progress-7"></div>
.progress-7 {
width:120px;
height:24px;
-webkit-mask:
radial-gradient(circle closest-side,#000 94%,#0000) 0 0/25% 100%,
linear-gradient(#000 0 0) center/calc(100% - 12px) calc(100% - 12px) no-repeat;
background:
linear-gradient(#25b09b 0 0) 0/0% no-repeat
#ddd;
animation:p7 2s infinite linear;
}
@keyframes p7 {
100% {background-size:100%}
}
- 遮罩 -webkit-mask 中 radial-gradient 是将宽度四等份，每份以最小 closest-side 的边为直径画圆。
8. 斑马线加载
<div class="progress-8"></div>
.progress-8 {
width:60px;
height:60px;
border-radius: 50%;
-webkit-mask:linear-gradient(0deg,#000 55%,#0000 0) bottom/100% 18.18%;
background:
linear-gradient(#f03355 0 0) bottom/100% 0% no-repeat
#ddd;
animation:p8 2s infinite steps(7);
}
@keyframes p8 {
100% {background-size:100% 115%}
}
- 对 linear-gradient 描绘的角度做调整，再加上蒙版。
9. 水柱加载
<div class="progress-9"></div>
.progress-9 {
--r1: 154%;
--r2: 68.5%;
width:60px;
height:60px;
border-radius: 50%;
background:
radial-gradient(var(--r1) var(--r2) at top ,#0000 79.5%,#269af2 80%) center left,
radial-gradient(var(--r1) var(--r2) at bottom,#269af2 79.5%,#0000 80%) center center,
radial-gradient(var(--r1) var(--r2) at top ,#0000 79.5%,#269af2 80%) center right,
#ccc;
background-size: 50.5% 220%;
background-position: -100% 0%,0% 0%,100% 0%;
background-repeat:no-repeat;
animation:p9 2s infinite linear;
}
@keyframes p9 {
33% {background-position: 0% 33% ,100% 33% ,200% 33% }
66% {background-position: -100% 66%,0% 66% ,100% 66% }
100% {background-position: 0% 100%,100% 100%,200% 100%}
}
radial-gradient 画出水平面的波动，就三个圆。var(–r1) 直接调用定义好的属性值。
10. 信号加载
<div class="progress-10"></div>
.progress-10 {
width:120px;
height:60px;
border-radius:200px 200px 0 0;
-webkit-mask:repeating-radial-gradient(farthest-side at bottom ,#0000 0,#000 1px 12%,#0000 calc(12% + 1px) 20%);
background:
radial-gradient(farthest-side at bottom,#514b82 0 95%,#0000 0) bottom/0% 0% no-repeat
#ddd;
animation:p10 2s infinite steps(6);
}
@keyframes p10 {
100% {background-size:120% 120%}
}
- 用 repeating-radial-gradient 方法画出环状的蒙版遮罩。radial-gradient 从底部向上圆形渐变填充。
看了这么多骚操作，你学废了吗？
反正我是没学明白 😥😥😥😥
渐变怎么这么复杂
