I have an HTML5 canvas image that I want to save from one page and use it on another page (by uploading the image into storage, AWS S3). I don't want to upload it to S3 on the first page.

What is the best strategy for this?

Possible solution

1. save the canvas as a dataURL / buffer ?
2. save that file to the user's device (local storage)?
3. on the new page retrieve the file
4. post image / file to S3