How to achieve switch effect in css

The first is the idea:

We use the tag to achieve this effect.

The selected and unselected features of the checkbox correspond to the on and off of the switch

on:on off:off

<label for="ck2">
  <input type="checkbox" id="ck2">
  <span>未选中，则关闭开关</span>
</label>
<br>
<label for="ck1">
  <input type="checkbox" id="ck1" checked>
  <span>选中，则打开开关</span>
</label>

Effect:

(Recommended tutorial: CSS Introduction Tutorial)

Start drawing the sketch of the off and on states

Here I will explain, using position to achieve positioning. Students who don’t understand can open MDN to view relevant knowledge

<P>off状态草图</P>
<div class="toggle">
  <div class="cookie"></div>
</div>
<br>
<P>on状态草图</P>
<div class="toggle2">
  <div class="cookie2"></div>
</div>
.toggle{
  display:inline-block;
  position:relative;
  height:25px;
  width:50px;  
  border-radius:4px;
  background:#CC0000;
}
.cookie{
  position:absolute;
  left:2px;
  top:2px;
  bottom:2px;
  width:50%;
  background:rgba(230,230,230,0.9);
  border-radius:3px;
}
.toggle2{
  display:inline-block;
  position:relative;
  height:25px;
  width:50px; 
  padding:2px;
  border-radius:4px;
  background:#66CC33;  
}
.cookie2{
  position:absolute;
  right:2px;
  top:2px;
  bottom:2px;  
  width:50%;
  background:rgba(230,230,230,0.9);
  border-radius:3px;
}

Effect:

Then we put these two sketches into the label

<label for="ck4">
  <input type="checkbox" id="ck4">
  <div class="toggle">
    <div class="cookie"></div>
  </div>
</label>
<br>
<label for="ck3">
  <input type="checkbox" id="ck3" checked>
  <div class="toggle2">
    <div class="cookie2"></div>
  </div>
</label>

Effect:

Combined label and checkbox to organize and optimize css

<label for="ck5">
  <input type="checkbox" id="ck5">
  <div class="toggle-finish">
    <div class="cookie-finish"></div>
  </div>
</label>
<br>
<label for="ck6">
  <input type="checkbox" id="ck6" checked>
  <div class="toggle-finish">
    <div class="cookie-finish"></div>
  </div>
</label>
.toggle-finish{
  cursor:pointer;
  display:inline-block;
  position:relative;
  height:25px;
  width:50px;  
  border-radius:4px;
  background:#CC0000;
}
.cookie-finish{
  position:absolute;
  left:2px;
  top:2px;
  bottom:2px;
  width:50%;
  background:rgba(230,230,230,0.9);
  border-radius:3px;
}
input:checked + .toggle-finish{
  background:#66CC33;  
}
input:checked + .toggle-finish .cookie-finish{ 
  left:auto;
  right:2px;
}

Effect:

So far, the function of a switch has been basically implemented. Remember to hide the input.

Recommended related video tutorials: css video tutorial

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