本文實例為大家分享了js瀑布流加載效果，動態加載圖片，供大家參考，具體內容如下
鼠標滾動事件，當鼠標滾動到下邊，動態加載圖片。
1. HTML代碼
<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>js實現瀑布流效果-動態加載圖片</title> <link rel="stylesheet" href="css/waterfallflow.css" type="text/css" /> <script src="js/waterfallflow.js"></script> </head> <body> <div id="container"> <div class="box"> <div class="box_img"> <img src="img/1.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/2.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/3.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/4.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/5.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/6.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/7.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/3.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/1.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/2.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/1.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/2.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/3.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/4.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/5.jpg" /> </div> </div> <div class="box"> <div class="box_img"> <img src="img/6.jpg" /> </div> </div> </div> </body></html>
2. CSS代碼
*{ margin: 0px; padding: 0px;}#container{ position: relative;}.box{ padding: 5px; float: left; margin: 0px auto;}.box_img{ padding: 5px; border: 1px solid #DCDCDC; box-shadow: 0 0 5px #ccc; border-radius: 5px;}.box_img img{ width: 230px;}3. JavaScript代碼
window.onload=function(){ imgLocation("container","box"); var imgData={"data":[{"src":"1.jpg"},{"src":"2.jpg"},{"src":"3.jpg"},{"src":"3.jpg"},{"src":"4.jpg"},{"src":"5.jpg"},{"src":"6.jpg"},{"src":"2.jpg"},{"src":"3.jpg"},{"src":"3.jpg"},{"src":"4.jpg"},{"src":"5.jpg"}]} window.onscroll=function(){// console.log(document.documentElement.scrollTop); if(checkFlag()){ var cparent=document.getElementById("container"); for(var i=0;i<imgData.data.length;i++){ var ccontent=document.createElement("div"); ccontent.className="box"; cparent.appendChild(ccontent); var boximg=document.createElement("div"); boximg.className="box_img"; ccontent.appendChild(boximg); var img=document.createElement("img"); img.src="img/"+imgData.data[i].src; boximg.appendChild(img); //另外一種方法在div后邊追加內容，不覆蓋原有內容// var content="<div class='box'><div class='box_img'><img src='img/"+imgData.data[i].src+"'/></div></div>";// cparent.innerHTML+=content; } imgLocation("container","box"); } }} function checkFlag(){ var cparent=document.getElementById("container"); var ccontent=getChildElement(cparent,"box");//圖片的所有box數 var lastContentHeight=ccontent[ccontent.length-1].offsetTop;//最后一張圖片距離頂部高度 var scrollTop=document.documentElement.scrollTop||document.body.scrollTop;//滾動條距離頂部高度 var pageHeight=document.documentElement.clientHeight||document.body.clientHeight;//屏幕高度// console.log(lastContentHeight+","+scrollTop+","+pageHeight); if(lastContentHeight<scrollTop+pageHeight){ return true; }} function imgLocation(parent,content){ var cparent=document.getElementById(parent); var ccontent=getChildElement(cparent,content);//圖片的所有box數 var imgWidth=ccontent[0].offsetWidth;//圖片寬度 var num=Math.floor(document.documentElement.clientWidth/imgWidth);//一行放圖片個數 cparent.style.cssText="width:"+imgWidth*num+"px;margin:0px auto";//container的寬度 var boxHeightArr=[];//每一列box高度 for(var i=0;i<ccontent.length;i++){ if(i<num){ boxHeightArr[i]=ccontent[i].offsetHeight; }else{ var minHeight=Math.min.apply(null,boxHeightArr);//最小高度 var minIndex = getMinheightLocation(boxHeightArr,minHeight);//得到最小高度下標// console.log(minHeight+","+minIndex); ccontent[i].style.position="absolute"; ccontent[i].style.top=minHeight+"px";//距離頂部高度 ccontent[i].style.left=ccontent[minIndex].offsetLeft+"px";//距離左邊長度 boxHeightArr[minIndex]+=ccontent[i].offsetHeight;// console.log(ccontent[i].offsetHeight+","+ccontent[i].height);//ccontent[i].height=undefined } }} function getMinheightLocation(boxHeightArr,minHeight){ for(var i in boxHeightArr){ if(boxHeightArr[i]==minHeight){ return i } }} function getChildElement(parent,content){ //將parent下有content的全部取出 var contentArr=[]; var allContent=parent.getElementsByTagName("*"); for(i=0;i<allContent.length;i++){ if(allContent[i].className=="box"){ contentArr.push(allContent[i]); } } return contentArr;}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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