How to implement image zoom-in animation with css

Method: 1. Use the "@keyframes animation name {}" rule and the "transform:scale (scale);" statement to create a zoom-in animation; 2. Use "picture element {animation: animation name time infinite ;}" statement scaling animation is applied to picture elements.

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

In CSS, you can use animation attributes, "@keyframes" rules, and transform: scale() to implement image zoom-in animation.

Example 1:

<div class="ballon"></div>

/*css部分*/
   @keyframes scaleDraw {  /*定义关键帧、scaleDrew是需要绑定到选择器的关键帧名称*/
            0%{
                transform: scale(1);  /*开始为原始大小*/
            }
            25%{
                transform: scale(1.1); /*放大1.1倍*/
            }
            50%{
                transform: scale(1);
            }
            75%{
                transform: scale(1.1);
            }
        }
    .ballon{
            width: 150px;
            height: 200px;
            background: url("images/balloon.png");
            background-size: 150px 200px;
            -webkit-animation-name: scaleDraw; /*关键帧名称*/
            -webkit-animation-timing-function: ease-in-out; /*动画的速度曲线*/
            -webkit-animation-iteration-count: infinite;  /*动画播放的次数*/
            -webkit-animation-duration: 5s; /*动画所花费的时间*/
        }

The above attributes can also be written together

animation: scaleDraw 5s ease-in-out infinite;
-webkit-animation: scaleDraw 5s ease-in-out infinite;

Effect:

Example 2:

 <div class="live">
         <img src="images/live.png" alt="">
         <span></span>
         <span></span>
 </div>

.live{
           position: relative;
           width: 100px;
           height: 100px;
       }
       .live img{
           width: 100px;
           height: 100px;
           z-index: 0;
       }
        @keyframes living {
            0%{
                transform: scale(1);
                opacity: 0.5;  
            }
            50%{
                transform: scale(1.5);  
                opacity: 0;   /*圆形放大的同时，透明度逐渐减小为0*/
            }
            100%{
                transform: scale(1);
                opacity: 0.5;
            }
        }
        .live span{
            position: absolute;
            width: 100px;
            height: 100px;
            left: 0;
            bottom: 0;
            background: #fff;
            border-radius: 50%;
            -webkit-animation: living 3s linear infinite;
            z-index: -1;
        }
        .live span:nth-child(2){
            -webkit-animation-delay: 1.5s; /*第二个span动画延迟1.5秒*/
        }

The essence is to use the delay attribute of animation. The animation-related attributes of the two layers of circles are basically the same. In addition to the outermost circle, the animation-delay attribute is set

(Learning video sharing: css video tutorial)

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