@Josephedirin said:
fetching image file path with Javascript
How do i get the image file path from themoviedb.org for my website using Javascript

I think you already know that the image_file_path are in the API Request responses.
And it knows what the base URL for the image is.

https://image.tmdb.org/t/p/original/[poster_path]  
https://image.tmdb.org/t/p/original/wigZBAmNrIhxp2FNGOROUAeHvdh.jpg  
https://image.tmdb.org/t/p/w500/wigZBAmNrIhxp2FNGOROUAeHvdh.jpg  

So you only need help with Javascript.
In this case I suggest:

• Wait for some user of this forum who knows Javascript
  
• Check this link if you find any solution - https://www.themoviedb.org/documentation/api/wrappers-libraries
  
• Seek help in another forum. Travis Bell recommends: https://stackoverflow.com/tags/themoviedb-api