初级篇：如何用CSS3制作爱心加载（代码详解） html制作爱心代码

网页中常常有这样的CSS3爱心加载，给大家分享一下看效果图看完效果，我们来研究一下是怎么实现呢，给大家用于讲解html+css图片文字排版的基本流程。

效果大概长这样

1、首先html创建新文件，定义9个div标签。

2、开始定义css样式来进行修饰添加background-color属性设置背景颜色，宽度设置为100%，高度设置为100%，margin属性设置所有外边距属性。

body {
        width: 100%;
        height: 100%;
        margin: 0;
        background-color: #ccc;
    }

3、container标题文本样式，利用align-items属性居中对齐。

.container {
        display: flex;
        width: 100%;
        height: 100%;
        justify-content: center;
        align-items: center;

4、header标题文本样式，利用position属性指定一个元素定位。

.header {
        position: relative;
        width: 138px;
        /* display: flex; */

5、class*=’header-‘标题文本样式，利用position属性定位元素，语法“position: absolute;top: -5px;border-radius: 5px”生成绝对定位的元素。

[class*='header-']{
        position: absolute;
        width: 10px;
        height: 10px;
        top: -5px;
        border-radius: 5px;
     }

6、header0-8标题文本样式，利用animation（动画）属性绑定到每8个元素，让元素摆动起来。

.header-0,
    .header-8 {
        animation: header-0 3.2s infinite;
    }
    .header-1,
    .header-7 {
        animation: header-1 3.2s infinite;
    }
    .header-2,
    .header-6 {
        animation: header-2 3.2s infinite;
    }
    .header-3,
    .header-5 {
        animation: header-3 3.2s infinite;
    }
    .header-4 {
        animation: header-4 3.2s infinite;
    }

7、使用4个@keyframes规则，给4个创建动画逐步改变0％是开头动画，100％。

@keyframes header-0 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 30px;
        top: -10px;
    }
}
@keyframes header-1 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 60px;
        top: -31px;
    }
}
@keyframes header-2 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 80px;
        top: -37px;
    }
}
@keyframes header-3 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 90px;
        top: -31px;
    }
}
@keyframes header-4 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 94px;
        top: -23px;
    }

8、header0-8标题文本样式添加animation-delay属性等待1秒然后开始动画，background属性设置颜色绑定8个元素。

.header-0 {
    left: 0;
    animation-delay: 0s;
    background: #92fe9d;

}
.header-1 {
    left: 16px;
    animation-delay: 0.15s;
    background: #00c9ff;
}
.header-2 {
    left: 32px;
    animation-delay: 0.3s;
    background: #ff758c;
}
.header-3 {
    left: 48px;
    animation-delay: 0.45s;
    background: #ff7eb3;
}
.header-4 {
    left: 66px;
    animation-delay: 0.6s;
    background: #fa71cd;
}
.header-5 {
    left: 82px;
    animation-delay: 0.75s;
    background: #6f86d6;
}
.header-6 {
    left: 98px;
    animation-delay: 0.9s;
    background: #f9f586;
}

.header-7 {
    left: 114px;
    animation-delay: 1.05s;
    background: #b1f4cf;
}
.header-8 {
    left: 130px;
    animation-delay: 1.2s;
    background: #fef9d7;
}

代码效果出来了

下面完整代码

    
    
    
    html,body {
        width: 100%;
        height: 100%;
        margin: 0;
        background-color: #ccc;
    }
  .container {
        display: flex;
        width: 100%;
        height: 100%;
        justify-content: center;
        align-items: center;

    }
    .header {
        position: relative;
        width: 138px;
        /* display: flex; */
    }
    [class*='header-']{
        position: absolute;
        width: 10px;
        height: 10px;
        top: -5px;
        border-radius: 5px;
        
    }
   .header-0,
    .header-8 {
        animation: header-0 3.2s infinite;
    }
    .header-1,
    .header-7 {
        animation: header-1 3.2s infinite;
    }
    .header-2,
    .header-6 {
        animation: header-2 3.2s infinite;
    }
    .header-3,
    .header-5 {
        animation: header-3 3.2s infinite;
    }
    .header-4 {
        animation: header-4 3.2s infinite;
    }

@keyframes header-0 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 30px;
        top: -10px;
    }
}
@keyframes header-1 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 60px;
        top: -31px;
    }
}
@keyframes header-2 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 80px;
        top: -37px;
    }
}
@keyframes header-3 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 90px;
        top: -31px;
    }
}
@keyframes header-4 {
    0%,
    10%,
    90%,
    100% {
        height: 10px;
        top: -5px;
    }
    45%,
    55% {
        height: 94px;
        top: -23px;
    }
}
.header-0 {
    left: 0;
    animation-delay: 0s;
    background: #92fe9d;

}
.header-1 {
    left: 16px;
    animation-delay: 0.15s;
    background: #00c9ff;
}
.header-2 {
    left: 32px;
    animation-delay: 0.3s;
    background: #ff758c;
}
.header-3 {
    left: 48px;
    animation-delay: 0.45s;
    background: #ff7eb3;
}
.header-4 {
    left: 66px;
    animation-delay: 0.6s;
    background: #fa71cd;
}
.header-5 {
    left: 82px;
    animation-delay: 0.75s;
    background: #6f86d6;
}
.header-6 {
    left: 98px;
    animation-delay: 0.9s;
    background: #f9f586;
}

.header-7 {
    left: 114px;
    animation-delay: 1.05s;
    background: #b1f4cf;
}
.header-8 {
    left: 130px;
    animation-delay: 1.2s;
    background: #fef9d7;
}