1. we have used table2excel JS (  https://github.com/rainabba/jquery-table2excel ) for converting HTML data in Excel sheet.

2. We are successfully converted dynamic data in excel sheet but when we try to open(after downloading) that excel sheet we are getting some warning message i.e. file format & extension don't match. 

3. Please refer the below screenshot for the same.

4. Is there any proper way to convert HTML data to excel sheet without getting such warning message.

5. Also most of the App in mobile devices like in IOS, Microsoft excel, office suit, Polaris are unable to open the file only WPS Office is opening the file.

6. Suggestions are appreciated.