CSS realizes process navigation effect (three methods)

CSS realizes the process navigation effect. The specific contents are as follows:

::tip Use pure CSS for online process navigation effects. This article uniformly adopts flex layout, you can also use other layouts to achieve it, the core principle remains unchanged:::

## Method 1: Cropping This method is not supported in IE

Use clip-path: polygon() to directly draw a triangle. The only point you need to calculate is the approximate percentage.

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width">
        <style>
            .nav-box {
                display: flex;
                list-style: none;
                font-size: 14px;
            }
            .nav-box li {
                white-space: nowrap;
                color: #019fe9;
                background: #edf9ff;
                counter-increment: listCounter;
                clip-path: polygon(87% 0, 100% 50%, 87% 100%, 0 100%, 13% 50%, 0 0);
                line-height: 40px;
                padding: 0 25px;
                margin-right: -10px;
            }
            .nav-box li::before {
                content: counter(listCounter) "-";
            }
            .nav-box .active {
                color: #fcfefe;
                background: #009fe9;
            }
            .nav-box .active ~ li {
                color: #8e8e8e;
                background: #ebedf0;
            }
        </style>
    </head>
    <body>
        <!-- Container -->
        <ol class="nav-box">
            <li><a href="">Rule Description</a></li>
            <li><a href="">Participate in the event</a></li>
            <li class="active" aria-current="true"><a href="">Participate in the lucky draw</a></li>
            <li><a href="">Prize Distribution</a></li>
            <li><a href="">View Results</a></li>
        </ol>
    </body>
</html>

## Method 2: Using Dislocation

flex + transform : skewX(); implement the prefix -ms- in ie9+ + This method also fully utilizes before and after. + Principle 1 --- Use before + after to divide into upper and lower halves <Badge text="[This method has a flaw that it needs to complete the first tail separately]" type="warn"/> + Principle 2 --- Use before + after to divide into left and right halves <Badge text="[This method only processes the first before or after to avoid the problem of the first one]" type="success"/>

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width">
       <style scoped>
            .nav-box {
                display: flex;
                list-style: none;
                font-size: 14px;
            }
            .nav-box li {
                white-space: nowrap;
                color: #019fe9;
                padding: 0 15px 0 25px;
                line-height: 40px;
                margin-left: 3px;
                position: relative;
                z-index: 99;
            }
            .nav-box li:first-child{
                background: #edf9ff;
                margin-right: 7px;
            }
            .nav-box .active:first-child{
                background: #019fe9;
            }
            .nav-box li:first-child::before,
            .nav-box li:first-child::after{
                left: 7px;
            }
            .nav-box li::before,
            .nav-box li::after {
                content: "";
                position: absolute;
                left: 0;
                height: 50%;
                width: 100%;
                background: #edf9ff;
                z-index: -1;
            }
            .nav-box li::before {
                top: 0;
                transform: skew(30deg);
            }
            .nav-box li::after {
                bottom: 0;
                transform: skew(-30deg);
            }
            .nav-box .active {
                color: #d7effb;
            }
            .nav-box .active::before,
            .nav-box .active::after {
                background: #009fe9;
            }
            .active ~ li {
                color: #909091;
            }
            .active ~ li::before,
            .active ~ li::after {
                background: #ebedf0;
            }
        </style>
    </head>
    <body>
        <!-- Container -->
        <ol class="nav-box">
            <li class="active">1-Rule Description</li>
            <li>2- Participate in activities</li>
            <li>3- Participate in the lucky draw</li>
            <li>4- Prize Distribution</li>
            <li>5-Participation Results</li>
        </ol>
    </body>
</html>

## Method 3: border triangle

Use border to generate front and back triangles. The disadvantage is that the index needs to be defined by yourself. CSS counters cannot be used without labels.

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <style>
    .nav-box{
        height:40px;
        line-height:40px;
        list-style: none;
        padding:0;
        display:flex;
        font-size:14px;
        overflow: hidden;
    }
    .nav-box li{
        padding:0 10px 0 10px;
        margin-right: 18px;
        white-space: nowrap;
        position:relative;
        color:#019fe9;
        background:#edf9ff;
    }
    /* Triangle */
    .nav-box li:before,.nav-box li:after{
        content:'';
        position:absolute;
        width: 0;
        height: 0;
    }
    .nav-box li:before{
        right: -16px;
        border: solid transparent;
        border-width: 20px 0 20px 16px;
        border-left-color:#edf9ff;
        z-index:2;
    }
    /* White line */
    .nav-box li:after{
        top: -3px;
        left: -18px;
        border: solid #edf9ff;
        border-width: 23px 0 23px 18px;
        border-left-color: transparent;
        z-index: 1;
    }
    .nav-box .active{
        color: #fff;
        background:#009fe9;
    }
    .nav-box .active ~ li{
        color:#8e8e8e;
        background:#ebedf0;
    }
    .nav-box .active:before{
        border-left-color:#009fe9;
    }
    .nav-box .active:after{
        border-color: #009fe9;
        border-left-color: transparent;
    }
    .nav-box .active ~ li:before{
        border-left-color:#ebedf0;
    } 
    .nav-box .active ~ li:after{
        border-color: #ebedf0;
        border-left-color: transparent;
    }
  </style>
</head>
<body>
    <ol class="nav-box">
        <li>1-Rules description</li>
        <li>2- Participate in activities</li>
        <li class="active">3- Participate in the lucky draw</li>
        <li>4- Prize Distribution</li>
        <li>5-Participation Results</li>
    </ol>
</body>
</html>

Summarize

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