MIUI option box switch style simulation

There is switch simulation for IOS, and of course there is also switch simulation for MIUI

Seeing the switch style in the settings options, I decided to try it out on a whim

The final effect is as shown in the picture:

Implementation process

1. Option box checkbox

Of course, the analog switch requires an option box, and the checkbox is used here

2. Understand the process of switching

Click the switch button to turn it on or off. The native checkbox cannot achieve the effect of the icon, so additional elements are needed to represent the switch in the picture

And we need to use the click effect of the checkbox and the effect of whether it is checked after clicking, so the checkbox cannot be hidden, but it can be overwritten

In order to reduce the use of redundant tags, you can use pseudo elements: before and :after. The tag structure is

<span style="color: #0000ff;">　　<</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="switch-wrap"</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">span</span><span style="color: #0000ff;">><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="switch-action"</span><span style="color: #0000ff;">></span>开启<span style="color: #0000ff;"></</span><span style="color: #800000;">span</span><span style="color: #0000ff;">></span>WLAN<span style="color: #0000ff;"></</span><span style="color: #800000;">span</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">label </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="switch"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="checkbox"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="switch"</span><span style="color: #ff0000;"> id</span><span style="color: #0000ff;">="switch"</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"></</span><span style="color: #800000;">label</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

3. Implementation of switch

Use the :before pseudo-element as the switch background layer, and the :after pseudo-element as the switch item (that is, the small circle)

<span style="color: #800000;">        .switch input:before </span>{<span style="color: #ff0000;">
            content</span>:<span style="color: #0000ff;"> ''</span>;<span style="color: #ff0000;">
            display</span>:<span style="color: #0000ff;"> inline-block</span>;<span style="color: #ff0000;">
            position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
            border-radius</span>:<span style="color: #0000ff;"> 20px</span>;<span style="color: #ff0000;">
            border</span>:<span style="color: #0000ff;"> 1px solid #ccccc6</span>;<span style="color: #ff0000;">
            box-shadow</span>:<span style="color: #0000ff;"> 0 0 1px 1px #ececf3</span>;<span style="color: #ff0000;">
            background-color</span>:<span style="color: #0000ff;"> #fff</span>;<span style="color: #ff0000;">
            cursor</span>:<span style="color: #0000ff;"> pointer</span>;
        }

<span style="color: #800000;">        .switch input:after </span>{<span style="color: #ff0000;">
            content</span>:<span style="color: #0000ff;"> ''</span>;<span style="color: #ff0000;">
            position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
            width</span>:<span style="color: #0000ff;"> 12px</span>;<span style="color: #ff0000;">
            height</span>:<span style="color: #0000ff;"> 12px</span>;<span style="color: #ff0000;">
            top</span>:<span style="color: #0000ff;"> 2px</span>;<span style="color: #ff0000;">
            left</span>:<span style="color: #0000ff;"> 3px</span>;<span style="color: #ff0000;">
            border-radius</span>:<span style="color: #0000ff;"> 50%</span>;<span style="color: #ff0000;">
            background-color</span>:<span style="color: #0000ff;"> #ccccc6</span>;<span style="color: #ff0000;">
            transition</span>:<span style="color: #0000ff;"> .2s left, .2s background-color</span>;
        }

The initial small circle is on the left. When the switch state is on, move it to the right and update the background color of the on state

<span style="color: #800000;">        .switch input:checked:after </span>{<span style="color: #ff0000;">
            left</span>:<span style="color: #0000ff;"> 15px</span>;<span style="color: #ff0000;">
            background-color</span>:<span style="color: #0000ff;"> #36a6fa</span>;<span style="color: #ff0000;">
            transition</span>:<span style="color: #0000ff;"> .2s left, .2s background-color</span>;
        }

The above is the key code, the following is the complete style

<span style="color: #008080;"> 1</span> <span style="color: #800000;"><style>
</span><span style="color: #008080;"> 2</span> <span style="color: #800000;">    .switch-wrap </span>{
<span style="color: #008080;"> 3</span> <span style="color: #ff0000;">            position</span>:<span style="color: #0000ff;"> relative</span>;
<span style="color: #008080;"> 4</span> <span style="color: #ff0000;">            margin</span>:<span style="color: #0000ff;"> 50px auto</span>;
<span style="color: #008080;"> 5</span> <span style="color: #ff0000;">            width</span>:<span style="color: #0000ff;"> 120px</span>;
<span style="color: #008080;"> 6</span> <span style="color: #ff0000;">            height</span>:<span style="color: #0000ff;"> 40px</span>;
<span style="color: #008080;"> 7</span> <span style="color: #ff0000;">            font</span>:<span style="color: #0000ff;"> 14px/1.5 Arial, Sans-Serif</span>;
<span style="color: #008080;"> 8</span>         }
<span style="color: #008080;"> 9</span> 
<span style="color: #008080;">10</span> <span style="color: #800000;">        .switch,
</span><span style="color: #008080;">11</span> <span style="color: #800000;">        .switch input,
</span><span style="color: #008080;">12</span> <span style="color: #800000;">        .switch input:before </span>{
<span style="color: #008080;">13</span> <span style="color: #ff0000;">            width</span>:<span style="color: #0000ff;"> 30px</span>;
<span style="color: #008080;">14</span> <span style="color: #ff0000;">            height</span>:<span style="color: #0000ff;"> 14px</span>;
<span style="color: #008080;">15</span>         }
<span style="color: #008080;">16</span> 
<span style="color: #008080;">17</span> <span style="color: #800000;">        .switch input </span>{
<span style="color: #008080;">18</span> <span style="color: #ff0000;">            position</span>:<span style="color: #0000ff;"> absolute</span>;
<span style="color: #008080;">19</span> <span style="color: #ff0000;">            right</span>:<span style="color: #0000ff;"> 0</span>;
<span style="color: #008080;">20</span>         }
<span style="color: #008080;">21</span> 
<span style="color: #008080;">22</span> <span style="color: #800000;">        .switch input:before </span>{
<span style="color: #008080;">23</span> <span style="color: #ff0000;">            content</span>:<span style="color: #0000ff;"> ''</span>;
<span style="color: #008080;">24</span> <span style="color: #ff0000;">            display</span>:<span style="color: #0000ff;"> inline-block</span>;
<span style="color: #008080;">25</span> <span style="color: #ff0000;">            position</span>:<span style="color: #0000ff;"> relative</span>;
<span style="color: #008080;">26</span> <span style="color: #ff0000;">            border-radius</span>:<span style="color: #0000ff;"> 20px</span>;
<span style="color: #008080;">27</span> <span style="color: #ff0000;">            border</span>:<span style="color: #0000ff;"> 1px solid #ccccc6</span>;
<span style="color: #008080;">28</span> <span style="color: #ff0000;">            box-shadow</span>:<span style="color: #0000ff;"> 0 0 1px 1px #ececf3</span>;
<span style="color: #008080;">29</span> <span style="color: #ff0000;">            background-color</span>:<span style="color: #0000ff;"> #fff</span>;
<span style="color: #008080;">30</span> <span style="color: #ff0000;">            cursor</span>:<span style="color: #0000ff;"> pointer</span>;
<span style="color: #008080;">31</span>         }
<span style="color: #008080;">32</span> 
<span style="color: #008080;">33</span> <span style="color: #800000;">        .switch input:after </span>{
<span style="color: #008080;">34</span> <span style="color: #ff0000;">            content</span>:<span style="color: #0000ff;"> ''</span>;
<span style="color: #008080;">35</span> <span style="color: #ff0000;">            position</span>:<span style="color: #0000ff;"> absolute</span>;
<span style="color: #008080;">36</span> <span style="color: #ff0000;">            width</span>:<span style="color: #0000ff;"> 12px</span>;
<span style="color: #008080;">37</span> <span style="color: #ff0000;">            height</span>:<span style="color: #0000ff;"> 12px</span>;
<span style="color: #008080;">38</span> <span style="color: #ff0000;">            top</span>:<span style="color: #0000ff;"> 2px</span>;
<span style="color: #008080;">39</span> <span style="color: #ff0000;">            left</span>:<span style="color: #0000ff;"> 3px</span>;
<span style="color: #008080;">40</span> <span style="color: #ff0000;">            border-radius</span>:<span style="color: #0000ff;"> 50%</span>;
<span style="color: #008080;">41</span> <span style="color: #ff0000;">            background-color</span>:<span style="color: #0000ff;"> #ccccc6</span>;
<span style="color: #008080;">42</span> <span style="color: #ff0000;">            transition</span>:<span style="color: #0000ff;"> .2s left, .2s background-color</span>;
<span style="color: #008080;">43</span>         }
<span style="color: #008080;">44</span> 
<span style="color: #008080;">45</span> <span style="color: #800000;">        .switch input:checked:after </span>{
<span style="color: #008080;">46</span> <span style="color: #ff0000;">            left</span>:<span style="color: #0000ff;"> 15px</span>;
<span style="color: #008080;">47</span> <span style="color: #ff0000;">            background-color</span>:<span style="color: #0000ff;"> #36a6fa</span>;
<span style="color: #008080;">48</span> <span style="color: #ff0000;">            transition</span>:<span style="color: #0000ff;"> .2s left, .2s background-color</span>;
<span style="color: #008080;">49</span>         }
<span style="color: #008080;">50</span> 
<span style="color: #008080;">51</span> 
<span style="color: #008080;">52</span> <span style="color: #800000;">    </style></span>

Full CSS code

4. Switch test

Finally, you can use JS to detect the status change of the switch

    <span style="color: #0000ff;"><</span><span style="color: #800000;">script </span><span style="color: #ff0000;">src</span><span style="color: #0000ff;">="jquery.js"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">script</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><</span><span style="color: #800000;">script </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="text/javascript"</span><span style="color: #0000ff;">></span><span style="background-color: #f5f5f5; color: #000000;">
        $(</span><span style="background-color: #f5f5f5; color: #000000;">'</span><span style="background-color: #f5f5f5; color: #000000;">#switch</span><span style="background-color: #f5f5f5; color: #000000;">'</span><span style="background-color: #f5f5f5; color: #000000;">).change(</span><span style="background-color: #f5f5f5; color: #0000ff;">function</span><span style="background-color: #f5f5f5; color: #000000;">() {
            $(</span><span style="background-color: #f5f5f5; color: #000000;">'</span><span style="background-color: #f5f5f5; color: #000000;">.switch-action</span><span style="background-color: #f5f5f5; color: #000000;">'</span><span style="background-color: #f5f5f5; color: #000000;">).text(</span><span style="background-color: #f5f5f5; color: #0000ff;">this</span><span style="background-color: #f5f5f5; color: #000000;">.checked </span><span style="background-color: #f5f5f5; color: #000000;">?</span> <span style="background-color: #f5f5f5; color: #000000;">'</span><span style="background-color: #f5f5f5; color: #000000;">关闭</span><span style="background-color: #f5f5f5; color: #000000;">'</span><span style="background-color: #f5f5f5; color: #000000;"> : </span><span style="background-color: #f5f5f5; color: #000000;">'</span><span style="background-color: #f5f5f5; color: #000000;">开启</span><span style="background-color: #f5f5f5; color: #000000;">'</span><span style="background-color: #f5f5f5; color: #000000;">);
        });
    </span><span style="color: #0000ff;"></</span><span style="color: #800000;">script</span><span style="color: #0000ff;">></span>