<link rel="preconnect">The rel="preconnect" attribute for the <link> HTML element is a hint to the browser that the page or user is likely to request resources from another origin, so the browser should preemptively start a connection to the href value's origin.resource-hintsResource hintswidely2020-01-152022-07-15https://html.spec.whatwg.org/multipage/links.html#link-type-preconnecthttps://developer.mozilla.org/docs/Web/HTML/Reference/Attributes/rel/preconnecthtml.elements.link.rel.preconnecthttps://nowyoucanuse.com/features--link-rel-preconnect.html