Project requirements:
you need to upload pictures on the web page on the PC. There are at least 10,000 pictures uploaded at a time, and receive the processing results of the background after all the images have been uploaded.

the way I practice:
by getting the files attribute of the input tag, but common browsers can"t select more than 5000 images at once. Even if 5000 images are uploaded at one time, the upload will fail due to the restriction of http. If the timer is used to upload, the browser may crash inexplicably due to a large number of http requests