[JS] File Uploader

[Avtech04]

Title and Issue number

Title :

Issue No. :

Code Stack :

Close #

Checklist:

• [] I have mentioned the issue number in my Pull Request.
• [X] I have commented my code, particularly in hard-to-understand areas
• [] I have created a helpful and easy to understand README.md
• [] I have updated the Index.html file for my contribution

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[arpansaha13]

Have you tried running it in your local