Pure CSS achieves ten good Loading effects

See T. Afif 's ten Loadingeffects on Twitter . As shown above.

Yeah, it's great, it's very practical, so I recorded it.

In order to ensure normal operation, we first stipulate the following:

* {
  box-sizing: border-box;
}
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1. Smooth loading

<div class="progress-1"></div>
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.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%}
}
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1. linear-gradient(#000 0 0)You can understand linear-gradient(#000 0 100%)that if you are not familiar with it, copy linear-gradient(#000 0 50%, #f00 50% 0)and replace the original part and run it. If you feel linear-gradient(#000 0 0)awkward , just write it directly #000.
2. 0/0%background-position: 0;/background-size: 0;is shorthand for .

2. Load step by step

<div class="progress-2"></div>
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.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%}
}
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1. steps(10)is step(10, end)a shorthand for , indicating that it was not at the beginning, so there is the processing of point 2
2. 100% {background-size:110%}Add stepa percentage of , above stepis 10, so yes100% + (1/10)*100% = 110%

3. Stripe Loading

<div class="progress-3"></div>
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.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%}
}
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repeating-linear-gradient(135deg,#ddd 0 10px,#eee 0 20px) 0/100%;Draw a gray zebra stripe, repeating-linear-gradient(135deg,#f03355 0 10px,#ffa516 0 20px) 0/0% no-repeatwhich is the stripe loaded by the progress bar.

4. Dotted line loading

<div class="progress-4"></div>
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.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%}
}
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-webkit-maskThere is a value by default repeat, otherwise the mask will not have five.

5. Battery loading

<div class="progress-5"></div>
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.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%}
}
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The original author implements the .progress-5::beforepseudo- element as follows:

.progress-5::before {
  content:"";
  position: absolute;
  top:-2px;
  bottom:-2px;
  left:100%;
  width:10px;
  background:
    linear-gradient(
        #0000   calc(50% - 7px),#000 0 calc(50% - 5px),
        #0000 0 calc(50% + 5px),#000 0 calc(50% + 7px),#0000 0) left /100% 100%,
    linear-gradient(#000 calc(50% - 5px),#0000 0 calc(50% + 5px),#000 0) left /2px 100%,
    linear-gradient(#0000 calc(50% - 5px),#000 0 calc(50% + 5px),#0000        0) right/2px 100%;
  background-repeat:no-repeat;
}
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#0000 is transparent, equal transparent

6. Inline loading

This name is a bit inappropriate, but it is not important, and readers will understand it naturally by looking at the picture.

<div class="progress-6"></div>
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.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}
}
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inset:0 100% 0 0;The right is indented 100%, so in the keyframessection you need to insetset to 0.

7. Bead Chain Loading

<div class="progress-7"></div>
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.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%}
}
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In the mask -webkit-mask, radial-gradientthe width is divided into four equal parts, and each part draws closest-sidea side as the diameter.

8. Zebra Loading

<div class="progress-8"></div>
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.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%}
}
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Adjust the angle of the linear-gradientdrawing and add a mask.

9. Water column loading

<div class="progress-9"></div>
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.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%}
}
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radial-gradientDraw the fluctuation of the horizontal plane, just three circles. var(--r1)Call the defined property value directly. skills get...

10. Signal loading

<div class="progress-10"></div>
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.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%}
}
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Use the repeating-radial-gradientmethod to draw a ring-shaped mask. radial-gradientCircular gradient fill from bottom to top.

Uha, have you lost your studies after watching so many showy operations?

References and Afterwords

• 原文：10 CSS-only loaders ready to use!
• Article first - blogs