本文介绍的是利用Vue实现购物小球抛物线的相关内容，下面话不多说了，来一起看看详细的介绍吧
css片段
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.shop{ position: fixed; top: 300px; left: 40px;}.ball{ position: fixed; left: 32px; bottom: 22px; z-index: 200; transition: all 0.4s cubic-bezier(0.49, -0.29, 0.75, 0.41); /*贝塞尔曲线*/}.inner{ width: 16px; height: 16px; border-radius: 50%; background-color: rgb(0,160,220); transition: all 0.4s linear;}.cart{ position: fixed; bottom: 22px; left: 32px; width: 30px; height: 30px; background-color: rgb(0,160,220); color: rgb(255,255,255);} |
html片段
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<div id="app"> <ul class="shop"> <li v-for="item in items"> <span>{{item.text}}</span> <span>{{item.price}}</span> <button @click="additem">添加</button> </li> </ul> <div class="cart" style="">{{count}}</div> <div class="ball-container"><!--小球--> <div v-for="ball in balls"> <transition name="drop" @before-enter="beforeDrop" @enter="dropping" @after-enter="afterDrop"> <div class="ball" v-show="ball.show"> <div class="inner inner-hook"></div> </div> </transition> </div> </div> </div> |
js片段
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<script> new Vue({ el:"#app", data:{ count: 0, items:[ { text: "苹果", price: 15 }, { text: "香蕉", price: 15 } ], balls: [ //小球 设为3个 { show: false }, { show: false }, { show: false }, ], dropBalls:[], }, methods:{ additem(event){ this.drop(event.target); this.count ++; }, drop(el){ //抛物 for(let i=0;i<this.balls.length;i++){ let ball= this.balls[i]; if(!ball.show){ ball.show = true; ball.el=el; this.dropBalls.push(ball); return; } } }, beforeDrop(el) {/* 购物车小球动画实现 */ let count = this.balls.length; while (count--) { let ball = this.balls[count]; if (ball.show) { let rect = ball.el.getBoundingClientRect(); //元素相对于视口的位置 let x = rect.left - 32; let y = -(window.innerHeight - rect.top - 22); //获取y el.style.display = ''; el.style.webkitTransform = 'translateY('+y+'px)'; //translateY el.style.transform = 'translateY('+y+'px)'; let inner = el.getElementsByClassName('inner-hook')[0]; inner.style.webkitTransform = 'translateX('+x+'px)'; inner.style.transform = 'translateX('+x+'px)'; } } }, dropping(el, done) { /*重置小球数量 样式重置*/ let rf = el.offsetHeight; el.style.webkitTransform = 'translate3d(0,0,0)'; el.style.transform = 'translate3d(0,0,0)'; let inner = el.getElementsByClassName('inner-hook')[0]; inner.style.webkitTransform = 'translate3d(0,0,0)'; inner.style.transform = 'translate3d(0,0,0)'; el.addEventListener('transitionend', done); }, afterDrop(el) { /*初始化小球*/ let ball = this.dropBalls.shift(); if (ball) { ball.show=false; el.style.display = 'none'; } } } }) </script> |
transtion属性可以查看官方文档，具体位置可以通过调试获得。
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原文链接：https://blog.csdn.net/weixin_49847526/article/details/109855595
