js 导出xlsx，xls，csv插件

js导出excel插件，插件中自带导出例子，插件解决导出excel打开时候报错“扩展名不一致问题”。

 属性            大小     日期    时间   名称
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     目录           0  2017-10-22 19:41  excellentexport-master\
     文件         100  2017-10-22 19:41  excellentexport-master\.babelrc
     文件          60  2017-10-22 19:41  excellentexport-master\.gitignore
     目录           0  2017-10-22 19:41  excellentexport-master\.idea\
     文件         180  2017-10-22 19:41  excellentexport-master\.idea\vcs.xml
     文件        1068  2017-10-22 19:41  excellentexport-master\LICENSE.txt
     文件        4165  2017-10-22 19:41  excellentexport-master\README.md
     文件         659  2017-10-22 19:41  excellentexport-master\bower.json
     文件         462  2017-10-22 19:41  excellentexport-master\composer.json
     目录           0  2017-10-22 19:41  excellentexport-master\dist\
     文件      882390  2017-10-22 19:41  excellentexport-master\dist\excellentexport.js
     文件        8278  2017-10-22 19:41  excellentexport-master\excellentexport.js
     文件        2631  2017-10-22 19:41  excellentexport-master\index.bigtable.html
     文件        3703  2017-10-22 19:41  excellentexport-master\index.html
     文件        2080  2017-10-22 19:41  excellentexport-master\index.require.html
     文件        2430  2017-10-22 19:41  excellentexport-master\karma.conf.js
     文件      284817  2017-10-22 19:41  excellentexport-master\package-lock.json
     文件        1865  2017-10-22 19:41  excellentexport-master\package.json
     目录           0  2017-10-22 19:41  excellentexport-master\test\
     文件         505  2017-10-22 19:41  excellentexport-master\test\checkversion.test.js
     文件        1758  2017-10-22 19:41  excellentexport-master\test\convert.test.js
     文件         240  2017-10-22 19:41  excellentexport-master\test\index.js
     文件        2440  2017-10-22 19:41  excellentexport-master\test\negative.test.js
     文件         261  2017-10-22 19:41  excellentexport-master\test\simple.test.js
     文件         762  2017-10-22 19:41  excellentexport-master\webpack.config.js