How to implement a simple switch component in css

As front-end development engineers, we often need to add various switches to the page. Today, we will use CSS to implement a simple switch component for future use in our projects.

We can implement the switch in two ways. One is to use ready-made components from front-end framework libraries. The other is to write the switch yourself using HTML and CSS. We choose the latter so that we can better understand the implementation principle of the switch.

First, on the HTML page, we need to create a container that contains the switch. This container can be a div element or a fieldset element. In this container we can create two labels, one to display the status of the switch and another for the actual on/off operation.

It is very simple to implement the switch using CSS and HTML. We only need to use the input[type="checkbox"] selector to select the checkbox. Then, we can define the style of the switch through CSS styles. Here is a simple HTML code snippet:

<div class="switch-container">
  <label for="switch"></label>
  <input type="checkbox" id="switch">
</div>

Then, we can use CSS styles to define the style of the switch, including the state of the switch.

.switch-container {
  position: relative;
  display: inline-block;
  width: 32px;
  height: 16px;
}

/* 设置 label 元素样式 */
.switch-container label {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: #fff;
  border: 1px solid #ccc;
  box-shadow: inset 0 0 1px rgba(0, 0, 0, 0.25);
  transition: all 0.2s ease-in-out;
}

/* 设置 switch 元素样式 */
.switch-container input[type="checkbox"] {
  display: none;
}

/* 设置 label 元素 `::before` 伪元素的样式 */
.switch-container label::before {
  content: "";
  display: block;
  position: absolute;
  width: 10px;
  height: 10px;
  top: 3px;
  left: 3px;
  border-radius: 50%;
  background-color: #888;
  box-shadow: 0 0 1px rgba(0, 0, 0, 0.25);
  transition: all 0.2s ease-in-out;
}

/* 设置 switch 上下面板的样式 */
.switch-container input[type="checkbox"]:checked + label {
  border-color: #2ecc71;
  background-color: #2ecc71;
}

.switch-container input[type="checkbox"]:checked + label::before {
  transform: translateX(16px);
  background-color: #fff;
}

What does the above code snippet do? He defines a container that contains a label tag and an input[type="checkbox"] element. We then use CSS styles to define the switch's state and style. We use pseudo-elements to represent the on and off states of the switch and an animation to simulate their movement.

Here we set the colors for the on and off states, but you can customize them by changing the CSS styles. We can also add a shadow to the container, use a slider instead of a circle, and more.

Finally, you just need to add this code to your website to use the beautiful CSS switch control.

In short, it is very easy to control the state of the switch using CSS styles. This is a very simple, lightweight solution to completely customize your switch style. If you need to add toggle controls to your website, try this simple but powerful trick to gain more control over the toggle and customize it to enhance the user experience.

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