Detect when user clicks link, but aborts

Question

I am working on a Web CMS. When the user clicks on a link to move to a different page, or submits a form, I want a "please wait" animated GIF to show up in the top

Answer 1

window.onabort seems to be a promising solution but at this time (2020-05-02) it is marked as an experimental technology supported by Chrome and Edge only. Besides, it seems is designed for handling abort of loading existing page or resources rather than next page.