How to Export HTML Table Data as Ms Excel file using JavaScript

In this video, it has been shown that how you can export table data as an MS Excel file using javascript. It is the sequel video another video, the video link is attached below:
First, we added a button with which we will export data, Then we wrote the javascript function below. We used blob here to export/download.

If you have any other queries like, how to export HTML table data pdf/CSV file or how to print table data, let us know in the comment section below. We'll try to make tutorials on those topics.
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[AlokKumar-otsx]

here are you using any external library? or only plain javascript

[twiztidstaticx]

I love this layout although i do have an issue when using the "var dataType = ??? Not sure what i should put here. Also i would like to be able to use this form and keep updating to the existing Excel sheet. Is this possible? I dont want to replace what is there i want to add to it. Thanks

[NirjharaaPatel]

Hello...the video is very useful and has an apt understanding...tho am facing an issue during var datatype = ?... I have tried multiple ways of using different mime-type extensions too...can you plz help out

[popibasak]

Sir why show file couldn't be accessed
Err file not found
When execute this code
Plz help

[ankitkumarghosh]

why dont you post codeforces editorials now?

[iwdtdef]

How to remove that corrupted error while opening the generated file.

[ateyajarin]

"How can we export data as pdf?"