How to read Excel file using JavaScript/Jquery?

Good evening!
Found this script SheetJS/js-xlsx, but the fact that I couldn't deal with it because a whole bunch and just get confused. Could you please help me with this, for example, working simple examples?
July 4th 19 at 23:38
1 answer
July 4th 19 at 23:40
Here the answer is example of:
Tried to create this theme - did not work. - Arthur_McCullough70 commented on July 4th 19 at 23:43

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