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Customize the style of input[type='radio']

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Sep 27, 2016 pm 02:05 PM

For forms, the style of input[type="radio"] is always not so friendly and behaves differently in different browsers.

In order to show their differences to the greatest extent and for good looks, some styles are first defined:

<span style="color: #000000;">html:
</span><span style="color: #0000ff;"><</span><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">=""</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="sex"</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="female"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">label </span><span style="color: #ff0000;">for</span><span style="color: #0000ff;">="female"</span><span style="color: #0000ff;">></span>女<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;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="radio"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="sex"</span><span style="color: #ff0000;"> id</span><span style="color: #0000ff;">="female"</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="male"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">label </span><span style="color: #ff0000;">for</span><span style="color: #0000ff;">="male"</span><span style="color: #0000ff;">></span>男<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;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="radio"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="sex"</span><span style="color: #ff0000;"> id</span><span style="color: #0000ff;">="male"</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"></</span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span>

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<span style="color: #800000;">css:
body </span>{<span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> 0</span>; }<span style="color: #800000;">
input </span>{<span style="color: #ff0000;"> padding</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> border</span>:<span style="color: #0000ff;"> 0</span>; }<span style="color: #800000;">
.female, .male </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    line-height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    margin-left</span>:<span style="color: #0000ff;"> 40px</span>;
}<span style="color: #800000;">
.sex label </span>{<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    line-height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    font-size</span>:<span style="color: #0000ff;"> 20px</span>;<span style="color: #ff0000;">
    cursor</span>:<span style="color: #0000ff;"> pointer</span>;
}<span style="color: #800000;">
.sex input </span>{<span style="color: #ff0000;">
    z-index</span>:<span style="color: #0000ff;"> 3</span>;<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
    top</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    bottom</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    left</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;">
    cursor</span>:<span style="color: #0000ff;"> pointer</span>;
}

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Then if you observe it in each browser, you will find that there are big differences:

ie:

edge:

opera:

chrome:

firefox:

For the Firefox browser, even if the width and height are set, it still has no effect. The circle in input[type="radio"] is still as big as the initial state. The performance of other browsers is also inconsistent. In order to achieve consistent effects, we need to do compatibility processing.

Thought:

1. Hide input[type="radio"] and put opacity: 0; on top. When we click it, we can respond to the original event correctly.

2. Customize a circle and place it on the lower layer to simulate the original similar style;

3. Use js to change the original background color of the custom element below it when input[type="radio"] is selected.

Code:

<span style="color: #000000;">html:
</span><span style="color: #0000ff;"><</span><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">=""</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="sex"</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="female"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">label </span><span style="color: #ff0000;">for</span><span style="color: #0000ff;">="female"</span><span style="color: #0000ff;">></span>女<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;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="radio"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="sex"</span><span style="color: #ff0000;"> id</span><span style="color: #0000ff;">="female"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="female-custom"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">span</span><span style="color: #0000ff;">> <!-- 同下面的 span 一样作为自定义的元素 --></span>
        <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="male"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">label </span><span style="color: #ff0000;">for</span><span style="color: #0000ff;">="male"</span><span style="color: #0000ff;">></span>男<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;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="radio"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="sex"</span><span style="color: #ff0000;"> id</span><span style="color: #0000ff;">="male"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="male-custom"</span><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;">div</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"></</span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span>

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<span style="color: #800000;">css:
body </span>{<span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> 0</span>; }<span style="color: #800000;">
input </span>{<span style="color: #ff0000;"> padding</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> border</span>:<span style="color: #0000ff;"> 0</span>; }<span style="color: #800000;">
.female, .male </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> relative</span>; /* 设置为相对定位，以便让子元素能绝对定位 */<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    line-height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    margin-left</span>:<span style="color: #0000ff;"> 40px</span>;
}<span style="color: #800000;">
.sex label </span>{<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    line-height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    font-size</span>:<span style="color: #0000ff;"> 20px</span>;<span style="color: #ff0000;">
    cursor</span>:<span style="color: #0000ff;"> pointer</span>;
}<span style="color: #800000;">
.sex input </span>{<span style="color: #ff0000;">
    z-index</span>:<span style="color: #0000ff;"> 3</span>;<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
    top</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    bottom</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    left</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>; /* 这里及以上的定位，可以让该元素竖直居中。(top: 0; bottom: 0;) */<span style="color: #ff0000;">
    opacity</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;">
    cursor</span>:<span style="color: #0000ff;"> pointer</span>;
}<span style="color: #800000;">
.sex span </span>{<span style="color: #ff0000;">
    position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
    top</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    bottom</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
    left</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;">
    margin</span>:<span style="color: #0000ff;"> auto</span>;<span style="color: #ff0000;">
    display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">
    width</span>:<span style="color: #0000ff;"> 25px</span>;<span style="color: #ff0000;">
    height</span>:<span style="color: #0000ff;"> 25px</span>;<span style="color: #ff0000;">
    border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;<span style="color: #ff0000;">
    border-radius</span>:<span style="color: #0000ff;"> 50%</span>;<span style="color: #ff0000;">
    cursor</span>:<span style="color: #0000ff;"> pointer</span>;
}<span style="color: #800000;">        
.sex span.active </span>{<span style="color: #ff0000;">
    background-color</span>:<span style="color: #0000ff;"> #000</span>;            
}

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<span style="color: #000000;">js:
$(</span>"#male").click( <span style="color: #0000ff;">function</span><span style="color: #000000;"> () {
    $(</span><span style="color: #0000ff;">this</span>).siblings("span").addClass("active"<span style="color: #000000;">);
    $(</span><span style="color: #0000ff;">this</span>).parents("div").siblings("div").children("span").removeClass("active"<span style="color: #000000;">);
});
$(</span>"#female").click( <span style="color: #0000ff;">function</span><span style="color: #000000;"> () {
    $(</span><span style="color: #0000ff;">this</span>).siblings("span").addClass("active"<span style="color: #000000;">);
    $(</span><span style="color: #0000ff;">this</span>).parents("div").siblings("div").children("span").removeClass("active"<span style="color: #000000;">);
});</span>

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After processing in this way, the display effects in the browser are all the same:

Extensions:

1. For the positioning that appears in the code, use position: relative; for the parent element; use position: absolute; top: 0; right: 0; bottom: 0; left: 0; margin: auto; for the child element, so that the child can be realized The element is displayed centered relative to the parent element (satisfying horizontal centering and vertical centering). If you just need to center it vertically, you don’t need to add the right: 0; and left: 0; styles.

2. Sometimes when it is not easy for us to determine the height of a child element, we can set it like this: position for the parent element: relative; position for the child element: absolute; top: 10px; bottom: 10px; margin: auto; In this way, the child element The height of an element is the height of the parent element minus 20px. Similarly, top and bottom support percentages, making it more scalable.

Optimization update:

Requirements:

1. Sometimes we need inline radio selection styles;

2. The small circle inside the selected button does not need to occupy the entire outer circle.

Thought:

1. Let each package selected div float left;

2. Add a circular outer border to the parent element, and set a background slightly smaller than the size of the parent element on the child element.

Code:

<span style="color: #000000;">html:
</span><span style="color: #0000ff;"><</span><span style="color: #800000;">form </span><span style="color: #ff0000;">action</span><span style="color: #0000ff;">=""</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="fruit"</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="apple"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">label </span><span style="color: #ff0000;">for</span><span style="color: #0000ff;">="apple"</span><span style="color: #0000ff;">></span>苹果<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;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="radio"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="fruit"</span><span style="color: #ff0000;"> id</span><span style="color: #0000ff;">="apple"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="user-defined"</span><span style="color: #0000ff;">></span>
                <span style="color: #0000ff;"><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="circle"</span><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;">div</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="banana"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">label </span><span style="color: #ff0000;">for</span><span style="color: #0000ff;">="banana"</span><span style="color: #0000ff;">></span>香蕉<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;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="radio"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="fruit"</span><span style="color: #ff0000;"> id</span><span style="color: #0000ff;">="banana"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="user-defined"</span><span style="color: #0000ff;">></span>
                <span style="color: #0000ff;"><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="circle"</span><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;">div</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="orange"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">label </span><span style="color: #ff0000;">for</span><span style="color: #0000ff;">="orange"</span><span style="color: #0000ff;">></span>橘子<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;">input </span><span style="color: #ff0000;">type</span><span style="color: #0000ff;">="radio"</span><span style="color: #ff0000;"> name</span><span style="color: #0000ff;">="fruit"</span><span style="color: #ff0000;"> id</span><span style="color: #0000ff;">="orange"</span><span style="color: #0000ff;">></span>
            <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="user-defined"</span><span style="color: #0000ff;">></span>
                <span style="color: #0000ff;"><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="circle"</span><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;">div</span><span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #0000ff;"></</span><span style="color: #800000;">form</span><span style="color: #0000ff;">></span>

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<span style="color: #800000;">css:
* </span>{<span style="color: #ff0000;"> box-sizing</span>:<span style="color: #0000ff;"> border-box</span>; }<span style="color: #800000;">

body </span>{<span style="color: #ff0000;"> padding</span>:<span style="color: #0000ff;"> 50px</span>; }<span style="color: #800000;">

input </span>{<span style="color: #ff0000;"> padding</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> border</span>:<span style="color: #0000ff;"> 0</span>; }<span style="color: #800000;">

.fruit:before </span>{<span style="color: #ff0000;"> content</span>:<span style="color: #0000ff;"> ""</span>;<span style="color: #ff0000;"> display</span>:<span style="color: #0000ff;"> table</span>; }<span style="color: #800000;">

.fruit:after </span>{<span style="color: #ff0000;"> content</span>:<span style="color: #0000ff;"> ""</span>;<span style="color: #ff0000;"> display</span>:<span style="color: #0000ff;"> table</span>;<span style="color: #ff0000;"> clear</span>:<span style="color: #0000ff;"> both</span>; }<span style="color: #800000;">

.fruit > div </span>{<span style="color: #ff0000;"> position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;"> float</span>:<span style="color: #0000ff;"> left</span>;<span style="color: #ff0000;"> margin-right</span>:<span style="color: #0000ff;"> 50px</span>;<span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;"> 80px</span>;<span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;"> line-height</span>:<span style="color: #0000ff;"> 40px</span>; }<span style="color: #800000;">

.fruit > div:last-child </span>{<span style="color: #ff0000;"> margin-right</span>:<span style="color: #0000ff;"> 0</span>; }<span style="color: #800000;">

.fruit label </span>{<span style="color: #ff0000;"> display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;"> 50px</span>;<span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;"> line-height</span>:<span style="color: #0000ff;"> 40px</span>;<span style="color: #ff0000;"> cursor</span>:<span style="color: #0000ff;"> pointer</span>; }<span style="color: #800000;">

.fruit input </span>{<span style="color: #ff0000;"> z-index</span>:<span style="color: #0000ff;"> 3</span>;<span style="color: #ff0000;"> display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;"> opacity</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;"> top</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> bottom</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> left</span>:<span style="color: #0000ff;"> 50px</span>;<span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> auto</span>;<span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;"> cursor</span>:<span style="color: #0000ff;"> pointer</span>; }<span style="color: #800000;">

.fruit .user-defined </span>{<span style="color: #ff0000;"> z-index</span>:<span style="color: #0000ff;"> 2</span>;<span style="color: #ff0000;"> position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;"> top</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> bottom</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> left</span>:<span style="color: #0000ff;"> 50px</span>;<span style="color: #ff0000;"> margin</span>:<span style="color: #0000ff;"> auto</span>;<span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;"> border</span>:<span style="color: #0000ff;"> 1px solid #000</span>;<span style="color: #ff0000;"> border-radius</span>:<span style="color: #0000ff;"> 50%</span>;<span style="color: #ff0000;"> cursor</span>:<span style="color: #0000ff;"> pointer</span>; }<span style="color: #800000;">

.fruit .user-defined span.circle  </span>{<span style="color: #ff0000;"> display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;"> 24px</span>;<span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;"> 24px</span>;<span style="color: #ff0000;"> margin-top</span>:<span style="color: #0000ff;"> 2px</span>;<span style="color: #ff0000;"> margin-left</span>:<span style="color: #0000ff;"> 2px</span>;<span style="color: #ff0000;"> background-color</span>:<span style="color: #0000ff;"> transparent</span>;<span style="color: #ff0000;"> border-radius</span>:<span style="color: #0000ff;"> 50%</span>; }<span style="color: #800000;">

.fruit .user-defined span.active  </span>{<span style="color: #ff0000;"> background-color</span>:<span style="color: #0000ff;"> #000</span>; }

Copy after login

<span style="color: #000000;">js:
$(</span>"input").click(<span style="color: #0000ff;">function</span><span style="color: #000000;">() {
    $(</span><span style="color: #0000ff;">this</span>).siblings("div").children("span").addClass("active"<span style="color: #000000;">);
    $(</span><span style="color: #0000ff;">this</span>).parents("div").siblings("div").find("span").removeClass("active"<span style="color: #000000;">);
});</span>

Copy after login

The effect is shown as follows:

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