Vue實現購物小球拋物線的方法例項
阿新 • • 發佈:2020-11-24
本文介紹的是利用Vue實現購物小球拋物線的相關內容,下面話不多說了,來一起看看詳細的介紹吧
css片段
.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); /*貝塞爾曲線*/ } .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(0,220); color: rgb(255,255,255); }
html片段
<div id="app"> <ul class="shop"> <li v-for="item in items"> <span>{{item.text}}</span> <span>{{item.price}}</span> <button @click="additem">新增</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
<script> new Vue({ el:"#app",data:{ count: 0,items:[ { text: "蘋果",price: 15 },{ text: "香蕉",price: 15 } ],balls: [ //小球 設為3個 { show: false },{ show: false },],dropBalls:[],},methods:{ additem(event){ this.drop(event.target); this.count ++; },drop(el){ //拋物 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) {/* 購物車小球動畫實現 */ let count = this.balls.length; while (count--) { let ball = this.balls[count]; if (ball.show) { let rect = ball.el.getBoundingClientRect(); //元素相對於視口的位置 let x = rect.left - 32; let y = -(window.innerHeight - rect.top - 22); //獲取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) { /*重置小球數量 樣式重置*/ let rf = el.offsetHeight; el.style.webkitTransform = 'translate3d(0,0)'; el.style.transform = 'translate3d(0,0)'; let inner = el.getElementsByClassName('inner-hook')[0]; inner.style.webkitTransform = 'translate3d(0,0)'; inner.style.transform = 'translate3d(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屬性可以檢視官方文件,具體位置可以通過除錯獲得。
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