https://github.com/DLHTX/waterfall-sinanews/edit/master/index.html
先将img标签中的src链接设为同一张图片（空白图片），将其真正的图片地址存储再img标签的自定义属性中（比如data-src）。当js监听到该图片元素进入可视窗口时，即将自定义属性中的地址存储到src属性中，达到懒加载的效果。
先通过计算出一排能够容纳几列元素，然后寻找各列之中所有元素高度之和的最小者，并将新的元素添加到该列上，然后继续寻找所有列的各元素之和的最小者，继续添加至该列上，如此循环下去，直至所有元素均能够按要求排列为止；
通过app.start()进入程序，然后通过ajax获取数据，之后将得到的数据拼装成html放入dom中，等待图片全部load完，进行瀑布流的布局，监听滚动事件，但是要设置节流函数，对于ajax的请求设置枷锁机制，不让它在没有接到数据的时候进行多次请求。
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
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A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
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