6

图片描述

效果预览

按下右侧的“点击预览”按钮可以在当前页面预览,点击链接可以全屏预览。

https://codepen.io/comehope/pen/rKPLMW

可交互视频

此视频是可以交互的,你可以随时暂停视频,编辑视频中的代码。

请用 chrome, safari, edge 打开观看。

https://scrimba.com/p/pEgDAM/c6NzPfK

源代码下载

每日前端实战系列的全部源代码请从 github 下载:

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

代码解读

定义 dom,容器中包含机体、出水口、咖啡杯、按钮和咖啡:

<div class="coffee-machine">
    <span class="body"></span>
    <span class="spout"></span>
    <span class="cup"></span>
    <span class="button"></span>
    <span class="coffee"></span>
</div>

居中显示:

body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to right bottom, sandybrown, darkred);
}

定义容器尺寸:

.coffee-machine {
    width: 15em;
    height: 15em;
    background-color: white;
    font-size: 20px;
    border-radius: 50%;
    border: 2em solid white;
}

画出机体的外框:

.coffee-machine {
    position: relative;
    display: flex;
    justify-content: center;
}

.body {
    position: absolute;
    width: 8em;
    height: 12em;
    background-color: sandybrown;
    border-radius: 1.2em;
    top: 1.5em;
    border-right: 0.6em solid peru;
}

用伪元素画出机体的中间部分:

.body::after {
    content: '';
    position: absolute;
    width: 8em;
    height: 8em;
    background-color: darkslategray;
    top: 2em;
    border-right: 0.6em solid black;
}

画出出水口:

.spout {
    position: absolute;
    width: 3em;
    height: 1em;
    background-color: white;
    top: 3.5em;
    border-radius: 0.5em;
    border-right: 0.5em solid silver;
}

画出咖啡杯的杯体:

.cup {
    position: absolute;
    width: 3em;
    height: 2em;
    background-color: white;
    bottom: 3.5em;
    border-radius: 0 0 1.4em 1.4em;
    border-right: 0.5em solid silver;
}

用伪元素画出咖啡杯的把手:

.cup::after {
    content: '';
    position: absolute;
    width: 0.6em;
    height: 0.6em;
    border: 0.3em solid silver;
    border-radius: 50%;
    right: -1.2em;
    top: 0.2em;
}

画出按钮:

.button {
    position: absolute;
    width: 1.2em;
    height: 1.2em;
    background-color: tomato;
    border-radius: 50%;
    bottom: 2em;
    right: 4.5em;
}

画出咖啡:

.coffee::before,
.coffee::after {
    content: '';
    position: absolute;
    width: 0.7em;
    height: 5em;
    background-color: chocolate;
    top: 4.5em;
    left: calc((15em - 0.7em) / 2);
}

接下来润色一下。

为咖啡机增加光影:

.coffee-machine {
    z-index: 1;
}

.coffee-machine::before,
.coffee-machine::after {
    content: '';
    position: absolute;
    width: 2em;
    height: 2em;
    border: 0.3em solid transparent;
    z-index: 2;
    border-radius: 50%;
    border-left-color: white;
    left: 3.8em;
}

.coffee-machine::before {
    top: 1.8em;
    transform: rotate(40deg);
}

.coffee-machine::after {
    bottom: 1.8em;
    transform: rotate(-40deg);
}

定义咖啡流动的前半段动画,即咖啡从出水口流到杯中:

.coffee::before {
    animation: 2s linear infinite;
    animation-name: pouring-before;
    transform-origin: top;
}

@keyframes pouring-before {
    0%, 20% {
        transform: scaleY(0);
    }

    30%, 100% {
        transform: scaleY(1);
    }

    70%, 100% {
        visibility: hidden;
    }
}

定义咖啡流动的后半段动画,即出水口停止流出咖啡,剩余咖啡流到杯中:

.coffee::after {
    animation: 2s linear infinite;
    animation-name: pouring-after;
    transform-origin: bottom;
}

@keyframes pouring-after {
    0%, 70% {
        visibility: hidden;
        transform: scaleY(1);
    }

    80%, 100% {
        transform: scaleY(0);
    }
}

大功告成!


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