js实现瀑布流布局(无限加载)
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2022-06-22 13:54:33
本文实例为大家分享了js实现瀑布流布局的具体代码,供大家参考,具体内容如下1.实现瀑布流布局思路准备好数据之后. 绑定滚动事件. 判断页面是否到底(滚动的距离+可是区域的高度 == 最后一个元素的to...
本文实例为大家分享了js实现瀑布流布局的具体代码,供大家参考,具体内容如下
1.实现瀑布流布局思路
准备好数据之后
. 绑定滚动事件
. 判断页面是否到底(滚动的距离+可是区域的高度 == 最后一个元素的top)
. 加载新数据,渲染新页面
.重新执行瀑布流效果
2.代码(更换图片路径之后可直接运行)
<!doctype html> <html> <head> <meta charset="utf-8"> <title>document</title> <style> .cont{margin: 0 auto;background: #ccc;position: relative;} .cont::after{content: "";display: block;clear: both;} .box{float: left;padding: 6px;} .imgbox{border: solid 1px black;padding: 6px;border-radius: 6px;} .imgbox img{width: 200px;display: block;} </style> <script src="data/data.js"></script> <script> // w1. 准备数据 // w2. 绑定滚动事件 // w3. 判断页面是否到底(滚动的距离+可是区域的高度 == 最后一个元素的top) // w4. 加载新数据,渲染新页面 // w5. 重新执行瀑布流效果 onload = function(){ new waterfall; } class waterfall{ constructor(){ // 1.选择元素 this.box = document.queryselectorall(".box"); this.cont = document.queryselector(".cont"); this.clienth = document.documentelement.clientheight; this.heightarr = []; // 2.补全布局 this.init(); this.addevent(); } addevent(){ var that = this; onscroll = function(){ var scrollt = document.documentelement.scrolltop; if(that.clienth + scrollt > that.scrollh-300){ that.render() } } } render(){ for(var i=0;i<data.length;i++){ var img = document.createelement("img") img.src = data[i].src; var imgbox = document.createelement("div") imgbox.classname = "imgbox"; var box = document.createelement("div") box.classname = "box"; imgbox.appendchild(img); box.appendchild(imgbox); this.cont.appendchild(box); } // 初始化所有 this.box = document.queryselectorall(".box"); this.heightarr = []; // 重新渲染瀑布流结构 this.firstline(); this.otherline(); } init(){ // 计算一行最多能放几个,再计算最大宽度 this.clientw = document.documentelement.clientwidth; this.boxw = this.box[0].offsetwidth; this.maxnum = parseint(this.clientw / this.boxw) this.cont.style.width = this.boxw * this.maxnum + "px"; // 3. 区分第一行 this.firstline() // 4. 区分其他行 this.otherline(); } firstline(){ // 5. 获取所有元素的高度,存起来 for(var i=0;i<this.maxnum;i++){ this.heightarr.push(this.box[i].offsetheight); } } otherline(){ for(var i=this.maxnum;i<this.box.length;i++){ // 6. 拿到第一行所有的高度 // console.log(this.heightarr) // 计算最小值和最小值的索引 // var min = getmin(this.heightarr); // var min = math.min.apply(null,this.heightarr); var min = math.min(...this.heightarr); var minindex = this.heightarr.indexof(min); // console.log(minindex); // 7. 设置元素的定位 this.box[i].style.position = "absolute"; // 8. 设置元素的top和left this.box[i].style.top = min + "px"; this.box[i].style.left = minindex * this.boxw + "px"; // 9. 修改最小值 this.heightarr[minindex] += this.box[i].offsetheight; } this.scrollh = document.documentelement.scrollheight; } } function getmin(arr){ // 先对数组进行截取(为了深拷贝) // 然后对截取出的新数组排序 // 找第0位 // 返回出去 return arr.slice(0).sort((a,b)=>a-b)[0]; } </script> </head> <body> <div class="cont"> <div class="box"> <div class="imgbox"> <img src="../imgs/4.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/2.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/3.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/5.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/1.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/6.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/7.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/8.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/9.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/10.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/4.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/2.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/3.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/5.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/1.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/6.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/7.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/8.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/9.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/10.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/4.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/2.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/3.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/5.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/1.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/6.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/7.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/8.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/9.jpg" alt=""> </div> </div> <div class="box"> <div class="imgbox"> <img src="../imgs/10.jpg" alt=""> </div> </div> </div> </body> </html>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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