前端开发技能：瀑布流动态伸缩变换
摘要：前端开发清理缓存插件|前端开发技术的起源与历史|前端手机端开发曲屏 列数是自适应的 建议全屏预览 html 代码 <!DOCTYPE html> <html> <head> <title>瀑布流布局</title> ……
前端开发清理缓存插件|前端开发技术的起源与历史|前端手机端开发曲屏
列数是自适应的 建议全屏预览
html 代码
<!DOCTYPE html>
<html>
<head>
<title>瀑布流布局</title>
<meta charset=”utf-8″>
<style type=”text/css”>
/*flex布局下子元素等高，不可用*/
.container {
/*display: flex;*/
/*flex-wrap: wrap;
justify-content: center;*/
text-align: center;
}
.col {
/*flex: 1;*/
/*display: flex;
flex-direction: column;*/
display: inline-block;
vertical-align: top;
}
.pic {
padding: 10px;
border: 1px solid #ccc;
margin: 0 10px 20px 10px;
border-radius: 2px;
width: 192px;
position: relative;
overflow: hidden;
}
.pic:hover .title {
opacity: 1;
}
.pic:hover .mask {
box-shadow: 0 0 0 110px rgba(0, 0, 0, 0.6) inset;
}
.title {
/*width: 100%;*/
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
transition: all 0.4s linear 0.2s;
color: #fff;
opacity: 0;
}
.mask {
position: absolute;
width: 100%;
height: 100%;
top: 0;
left: 0;
box-shadow: 0 0 0 0px rgba(0, 0, 0, 0.4) inset;
transition: all 0.5s linear;
}
img {
width: 100%;
}
</style>
</head>
<body>
<div class=”container”></div>
</body>
<script type=”text/javascript”>
var waterfall = {
container: document.querySelector(‘.container’),
imgRoot: ‘http://cued.xunlei.com/demos/publ/img/’,
colW: 234,
imgIndex: 100,
colNum: 0,
// 判断列数并渲染
render: function () {
this.imgIndex = 100;
this.colNum = Math.floor(document.body.clientWidth / this.colW);
var tempHtml = ”;
for (var i = 0; i < this.colNum; i++) {
var colHtml = ”;
for (var j = 0; j < 5; j++) {
colHtml += ‘<div class=”pic”>\
<img src=”‘+ this.imgRoot + ‘P_’ + (this.imgIndex % 160) + ‘.jpg”>\
<div class=”mask”></div>\
<div class=”title”>我是描述文字</div>\
</div>’;
this.imgIndex++;
};
tempHtml += ‘<div class=”col col’ + (i + 1) + ‘”>’ + colHtml + ‘</div>’;
}
this.container.innerHTML = tempHtml;
},
// 判断是否滚动到最底部，并加载
scrollEndAppend: function () {
for (var i = 0; i < this.colNum; i++) {
var ele = document.querySelector(‘.col’ + (i + 1));
if (ele.clientHeight < document.body.scrollTop + window.innerHeight – 100) {
this.imgIndex = this.imgIndex % 160 > 100 ? this.imgIndex % 160 : this.imgIndex % 160 + 100;
var div = document.createElement(‘div’);
div.className = ‘pic’;
var img = document.createElement(‘img’);
img.src = this.imgRoot + ‘P_’ + this.imgIndex + ‘.jpg’;
var mask = document.createElement(‘div’);
mask.className = ‘mask’;
var title = document.createElement(‘div’);
title.className = ‘title’;
title.innerHTML = ‘我是描述文字’;
div.appendChild(img);
div.appendChild(mask);
div.appendChild(title);
ele.appendChild(div);
this.imgIndex++;
}
}
},
init: function () {
this.render();
var self = this;
window.onresize = this.render.bind(this);
window.onscroll = function () {
setTimeout(self.scrollEndAppend.bind(self), 100);
}
}
}
waterfall.init();
</script>
</html>
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