List:add infinite & detail optimize

[nikogu]

• support infinite loading
• add some simple demo List Component #4905 (comment)
• loading optimize List optimize #7391 (comment)
• React.children.map -> context 0034d05#commitcomment-23935894

[afc163]

都是第一个。。。

[nikogu]

我改改。。。忽略了这个细节 ＝。-

[codecov]

Codecov Report

Merging #7445 into antd-3.0 will decrease coverage by 0.98%.
The diff coverage is 44.04%.

@@             Coverage Diff              @@
##           antd-3.0    #7445      +/-   ##
============================================
- Coverage     86.95%   85.97%   -0.99%     
============================================
  Files           252      252              
  Lines          5160     5234      +74     
  Branches       1428     1446      +18     
============================================
+ Hits           4487     4500      +13     
- Misses          673      734      +61

Impacted Files	Coverage Δ
components/list/Item.tsx	100% <100%> (ø)	⬆️
components/list/index.tsx	40.77% <40.5%> (-59.23%)	⬇️
components/menu/index.tsx	96.11% <0%> (ø)	⬆️

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[afc163]

Add some test?

[yesmeck]

这个为啥叫 grid

[nikogu]

这个跟 Card 保持一致

[yesmeck]

这个 infinite loading 感觉没必要在组件内部实现？可以有独立的组件实现吧，比如 https://github.com/CassetteRocks/react-infinite-scroller

还有如果要做无限加载的话是不是还要实现 virtualization。

[afc163]

对，最好把 virtualization 的功能内建到 List 里。这样 List 可以作为纯粹的逻辑组件和各种自定义列表配合。

[nikogu]

这个 infinite loading 感觉没必要在组件内部实现？可以有独立的组件实现吧，比如 https://github.com/CassetteRocks/react-infinite-scroller

内部实现更方便一点？他只用关心逻辑就好了，loading 一般都标准化了，类似 Table？好像独立组件实现没有什么优势，除了可以灵活定制样式（不过一般我们 loading 的样子都视觉规范好了）？

[nikogu]

virtualization 后面可以搞个...

[nikogu]

pro 那边需要，先合了，其他功能已经记录到：#4905