链接:
https://github.com/facebook/react-native/blob/master/Examples/2048/GameBoard.js
代码第35行
···
var Tile = function (value?: number, row?: number, column?: number) {
};
···
value?: number, row?: number, column?: number这个是个什么语法？
› React
This topic created in 4016 days ago, the information mentioned may be changed or developed.
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1
zythum Jun 4, 2015
用 babel 转换为 var Tile = function Tile(value, row, column) {};
所以估计是某个es7的冷门规范。估计是规定类型什么（类似typescript），但是具体规范在哪没找到.... |
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2
leofml Jun 4, 2015  2
facebook 出的 http://flowtype.org/
Flow is a static type checker, designed to find type errors in JavaScript programs |
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3
amphineko Jun 5, 2015 via iPhone
condition ? value-true : value-false
就是 ? 运算符吧 |
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