How to implement constant monitoring of a variable?

Question

Flask

There is a variable images, it contains a list of images.
images= os.listdir('./output')

The Flask script displays images from this list on the page.
Right now the list of images is updated only after the page is reloaded.

How can I implement constant monitoring and updating of the images list so that images are displayed without refreshing the page?

Answer 1

Ajax

Answer 2

Use AJAX technology that will send a request to the server, and in response the server will return a new image