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React学习手册
book

React学习手册

by Alex Banks, Eve Porcello
December 2017
Intermediate to advanced
329 pages
6h 9m
Chinese
China Electric Power Press Ltd.
Content preview from React学习手册
JavaScript
新特性
31
示例
2-7
:模块文件
./mt-freel.js
const freel = new Expedition("Mt. Freel", 2, ["water", "snack"])
export default
freel
当希望导出的数据只包含一种类型时,用户可以使用
export default
替换
export
。当
然,
export
export default
都适用于任意
JavaScript
数据类型:基元、对象、数组和
函数。
4
还可以使用
import
语句在其他
JavaScript
文件中调用模块。包含多个
exoprt
语句的模块
还可以进行对象解构。使用
epxort default
的模块还可以被导入到单个变量中:
import { print, log } from './text-helpers'
import freel from './mt-freel'
print('printing a message')
log('logging a message')
freel.print()
用户甚至可以通过别名实现模块变量的本地化:
import { print as p, log as l } from './text-helpers'
p('printing a message')
l('logging a message')
用户还可以通过星号
*
将所有信息导入单个变量中:
import * as fns from './text-helpers
目前并非所有主流的浏览器都为 ...
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Publisher Resources

ISBN: 9787519814236