Why is pdf not downloading correctly in firefox?

Question

JavaScript

Through ajax, a pdf is downloaded using the following code

jQuery('#lp-download-pdf')
    .attr('href', string.trim())
    .attr('download', string.split('/').pop())[0]
     .click();

in chrome everything happens correctly, but in firefox if you upload 2 different files with the same name but different content, then the first uploaded file is downloaded all the time until the browser is restarted. the back end returns different files. What could be the problem?

Answer 1

The above code is not directly related to the ajax technology. It just substitutes the href properties (by the presence of this property, you can guess that this is a link element) and download properties into the element with the lp-download-pdf id, then, forcibly, programmatically fires a click event, as if the user clicked on the element.
How the browser will react to a double "robotic" click on a link with the same href can only be guessed at. You can try to make the link unique on each click.
Substitute some random parameter to the link at this stage:

.attr('href', string.trim() + "?random_param=" + Math.round(Math.random() * 1000))