jQuery Changing Element Styles and Classes

//Select every second link
const $odd = $('a:odd');

//Select all secure links
const $secureLinks = $('a[href^="https://"]');

//Select all links that ends with .pdf
const $pdfs = $('a[href$=".pdf"]');

//Add target blank attribute to every secure link
$secureLinks.attr('target', '_blank');

//Make downloadable pdf-s instead of open it in the browser
$pdfs.attr('download', true);