How to use pure CSS to implement iPhone price infographic (source code attached)

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Release: 2018-09-19 16:10:15
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本篇文章给大家带来的内容是关于如何使用纯CSS实现iPhone 价格信息图(附源码),有一定的参考价值,有需要的朋友可以参考一下,希望对你有所帮助。

效果预览

How to use pure CSS to implement iPhone price infographic (source code attached)

源代码下载

https://github.com/comehope/front-end-daily-challenges

代码解读

定义 dom,容器中包含 3 个元素,h1 是图表标题,.back 表示背景墙,.side 表示侧边墙,.back.side 中都包含一个无序列表,背景墙展示价格,侧边墙展示名称:

<div>
    <h1>iPhone Price Comparison</h1>
    <div>
        <ul>
            <li><span>$1099 ~ $1449</span></li>
            <li><span>$999 ~ $1349</span></li>
            <li><span>$749 ~ $899</span></li>
            <li><span>$999 ~ $1149</span></li>
        </ul>
    </div>
    <div>
        <ul>
            <li>iPhone XS Max</li>
            <li>iPhone XS</li>
            <li>iPhone XR</li>
            <li>iPhone X</li>
        </ul>
    </div>
</div>
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居中显示:

body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(lightblue, skyblue);
}
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定义容器尺寸:

.wall {
    width: 60em;
    height: 40em;
    border: 1em solid rgba(255, 255, 255, 0.5);
    border-radius: 2em;
    font-size: 10px;
}
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用 grid 布局,把容器分成 2 部分,左侧80%为背景墙,右侧20%为侧边墙:

.wall {
    display: grid;
    grid-template-columns: 0 4fr 1fr;
}
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分别设置背景墙和侧边墙的背景色:

.back {
    background: linear-gradient(
        to right,
        #555,
        #ddd
    );
}

.side {
    background: 
        radial-gradient(
            at 0% 50%,
            /* tomato 25%,
            yellow 90% */
            rgba(0, 0, 0, 0.2) 25%,
            rgba(0, 0, 0, 0) 90%
        ),
        linear-gradient(
            to right,
            #ddd,
            #ccc
        )
}
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用 flex 布局设置对齐方式,列表垂直居中:

.back,
.side {
    display: flex;
    align-items: center;
}

.back {
    justify-content: flex-end;
}

ul {
    list-style-type: none;
    padding: 0;
}
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设置标题样式:

h1 {
    position: relative;
    width: 20em;
    margin: 1em;
    color: white;
    font-family: sans-serif;
}
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设置列表项的高度和颜色:

.back ul {
    width: 75%;
}

.side ul {
    width: 100%;
}

ul li {
    height: 5em;
    background-color: var(--c);
}

ul li:nth-child(1) {
    --c: tomato;
}

ul li:nth-child(2) {
    --c: coral;
}

ul li:nth-child(3) {
    --c: lightsalmon;
}

ul li:nth-child(4) {
    --c: deepskyblue;
}
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至此,整体布局完成。接下来设置左侧背景墙的横条样式。
横条的宽度根据与商品的上限售价 --high-price 成正比,以最贵的售价 --max-price 作为全长,其他横条的宽度为上限售价与最高售价的百分比:

ul {
    display: flex;
    flex-direction: column;
}

.back ul {
    align-items: flex-end;
}

ul {
    --max-price: 1449;
}

ul li.xs-max {
    --high-price: 1449;
}

ul li.xs {
    --high-price: 1349;
}

ul li.xr {
    --high-price: 899;
}

ul li.x {
    --high-price: 1149;
}

.back ul li {
    width: calc(var(--high-price) / var(--max-price) * 100%);
}
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在横条中区分起售价 --low-price 的位置,比起售价高的区域填充更深的颜色:

ul li.xs-max {
    --low-price: 1099;
    --c2: orangered;
}

ul li.xs {
    --low-price: 999;
    --c2: tomato;
}

ul li.xr {
    --low-price: 749;
    --c2: coral;
}

ul li.x {
    --low-price: 999;
    --c2: dodgerblue;
}

.back ul li {
    --percent: calc(var(--low-price) / var(--high-price) * 100%);
    background: linear-gradient(
        to left,
        var(--c) var(--percent),
        var(--c2) var(--percent)
    );
}
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在横线的顶端画出一个向左的三角形:

.back ul li {
    position: relative;
}

.back ul li::before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    transform: translateX(-3em);
    border-right: 3em solid var(--c2);
    border-top: 2.5em solid transparent;
    border-bottom: 2.5em solid transparent;
}
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设置价格文字样式:

.back ul li span {
    position: absolute;
    width: 95%;
    text-align: right;
    color: white;
    font-size: 1.25em;
    line-height: 4em;
    font-family: sans-serif;
}
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为各横条增加阴影,增强立体感:

ul li.xs-max {
    z-index: 5;
}

ul li.xs {
    z-index: 4;
}

ul li.xr {
    z-index: 3;
}

ul li.x {
    z-index: 2;
}

.back ul li {
    filter: drop-shadow(0 1em 1em rgba(0, 0, 0, 0.3));
}
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至此,背景墙的横条完成。接下来设置侧边墙的样式。
为了制造立体效果,需要设置侧边墙的景深,并使列表倾斜:

.side {
    perspective: 1000px;
}

.side ul {
    transform-origin: left;
    transform: rotateY(-75deg) scaleX(4);
}
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设置侧边墙的文字样式:

.wall {
    overflow: hidden;
}

.side ul li {
    padding-right: 30%;
    text-align: right;
    color: white;
    font-family: sans-serif;
    line-height: 5em;
}
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至此,静态视觉效果完成。最后增加入场动画效果:

ul li {
    animation: show 1s linear forwards;
    transform-origin: right;
    transform: scaleX(0);
}

@keyframes show {
    to {
        transform: scaleX(1);
    }
}

.back ul li {
    animation-delay: 1s;
}
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大功告成!

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