纯css瀑布流、Grid布局

1、纯css瀑布流

https://www.w3cplus.com/css/pure-css-create-masonry-layout.html

2、Grid布局

https://www.jianshu.com/p/d183265a8dad

案例：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>实现瀑布流</title>
</head>
<body>

	<div id="content-wrap">
		
	</div>

<script>
    (function () {
		var wrap = document.getElementById('content-wrap');
		for (var i = 0; i < 18; i++) {

			// 2.2flex布局：蛋疼（行与行是平行的）
			// var itemWrap = document.createElement('div');
			// itemWrap.setAttribute('class', 'item-wrap');
			// var item = document.createElement('div');
			// item.setAttribute('class', 'item');
			// itemWrap.append(item);
			// var itemChild = document.createElement('div');
			// itemChild.setAttribute('class', 'item-single');
			// item.append(itemChild);
			// itemChild.innerText = i+1;
			// wrap.append(itemWrap);
			//3.grid布局
			var item = document.createElement('div');
			item.setAttribute('class', 'item');
			var itemChild = document.createElement('div');
			itemChild.setAttribute('class', 'item-single');
			item.append(itemChild);
			itemChild.innerText = i+1;
			wrap.append(item);
		}
	})()
</script>

</body>
<style>
	.item{
		display: flex;
		justify-content: center;
		align-items: center;
		border: 1px solid red;
		color: red;
	}

	/* 1.多列布局  2.1flex布局：蛋疼（设定外容器的高度） */
	/* .item:nth-child(3),
	.item:nth-child(14),
	.item:nth-child(17),
	.item:nth-child(24),
	.item:nth-child(28),
	.item:nth-child(29),
	.item:nth-child(31),
	.item:nth-child(42){
		height: 50px;
		border: 1px solid gray;
		color: gray;
	}
	.item:nth-child(4),
	.item:nth-child(19),
	.item:nth-child(22),
	.item:nth-child(27),
	.item:nth-child(35),
	.item:nth-child(45){
		height: 180px;
		border: 1px solid yellowgreen;
		color: yellowgreen;
	}
	.item:nth-child(8),
	.item:nth-child(23),
	.item:nth-child(38),
	.item:nth-child(42),
	.item:nth-child(46),
	.item:nth-child(49){
		height: 200px;
		border: 1px solid blue;
		color: blue;
	} */
	/* 1.多列布局*/
	/* #content-wrap{
		column-count: 5;
		column-gap: 30px;
	}
	.item{
		break-inside: avoid;
	} */
	/* 2.1flex布局：蛋疼（设定外容器的高度） */
	/* #content-wrap {
		display: flex;
		flex-flow: column wrap;
		width: 100%;
		height: 100vh;
	} */



	/* 2.2flex布局：蛋疼（行与行是平行的） */
	/* .item-wrap:nth-child(14) .item,
	.item-wrap:nth-child(17) .item,
	.item-wrap:nth-child(24) .item,
	.item-wrap:nth-child(28) .item,
	.item-wrap:nth-child(29) .item,
	.item-wrap:nth-child(31) .item,
	.item-wrap:nth-child(42) .item{
		height: 50px;
		border: 1px solid gray;
		color: gray;
	}
	.item-wrap:nth-child(4) .item,
	.item-wrap:nth-child(19) .item,
	.item-wrap:nth-child(22) .item,
	.item-wrap:nth-child(27) .item,
	.item-wrap:nth-child(35) .item,
	.item-wrap:nth-child(45) .item{
		height: 180px;
		border: 1px solid yellowgreen;
		color: yellowgreen;
	}
	.item-wrap:nth-child(8) .item,
	.item-wrap:nth-child(23) .item,
	.item-wrap:nth-child(38) .item,
	.item-wrap:nth-child(42) .item,
	.item-wrap:nth-child(46) .item,
	.item-wrap:nth-child(49) .item{
		height: 200px;
		border: 1px solid blue;
		color: blue;
	}
	#content-wrap{
		display: flex;
		flex-direction: row;
		flex-wrap: wrap;
	}
	.item-wrap{
		display: flex;
		flex-direction: column;
		width: calc(100%/6);
	}  */


	

	/* 3.grid布局 */
	#content-wrap{
		display: grid;
		grid-template-rows: repeat(5, 1fr);
		grid-template-columns: repeat(5, 1fr);
		grid-gap: 10px;
		grid-auto-flow: row dense;
	}
	.item-wrap{
		
	}  
	.item:nth-child(7){
		grid-column: 2/5;
		grid-row: 3/5;
	}
	.item:nth-child(9){
		grid-column: span 2;
		grid-row: span 2;
	}
</style>
</html>