fix #1183 transfer js code in export.html into separe .js file (commit name export files)

[Sally-N]

Fixes #1183 (<=== Add issue number here)

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[Sally-N]

@TildaDares I just made a pull request and I'd love a review from you

[TildaDares]

Hi @Sally-N, looks like your linter/formatter has added unnecessary changes. Can you disable the linter, undo the changes and then redo them? Thanks!

[Sally-N]

Will do that. Thank you @TildaDares

[Sally-N]

@TildaDares I made the changes, Request for review

[TildaDares]

Feel free to just click the Commit suggestion button. Thanks!

[TildaDares]

Great work @Sally-N. Thanks!

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