Download animation

Hello,

Sometimes files are a little too big, large pdf for example.

A weblink in my website with target="_blank" to open in new tab will open blank tab while waiting for the file to load.

I would love to see a "loading" animation while the file is loaded.

Following instructions from advanced config i've create a config.php in /customizables

I have set it to true

$config['app']['weblinks']['show_page_before_download'] = true;

This supposedly would open "download.html"

I've created a simple download.html in system/modules/weblinks/sections/default/html/pages with a loader animation

When i click on the weblink it just does not open anything, i see the weblink in the navigation pane but neither animation, nor file loading, i just get nothing.

I've created a simpler download.html in case the loader was causing troubles

No success

So, is there a way that user clicking on a weblink can see sth while the file is loading?

Thank you!