Add option to choose between .xls and .xlsx

[amig0s]

Hi, it is possible to change format to xlsx file instead of xls? thank you!

[dqve]

I tried the following to fix this issue and it seems to work:

To change the file extension of the downloaded file, modify

var filename = String(this.props.filename) + '.xls' 

to

var filename = String(this.props.filename) + '.xlsx' 

at line 124 in index.js

[shahabahmed1]

I tried the following to fix this issue and it seems to work:

To change the file extension of the downloaded file, modify

var filename = String(this.props.filename) + '.xls' 

to

var filename = String(this.props.filename) + '.xlsx' 

at line 124 in index.js

I tried the same but its not working for me.. and for me, the line number is 74 in index.js