<link rel="expect">The rel="expect" attribute for the <link> HTML element is a hint to the browser to block rendering until the element that the href value references is connected to the document and fully parsed.limitedhttps://html.spec.whatwg.org/multipage/links.html#link-type-expecthttps://developer.mozilla.org/docs/Web/HTML/Reference/Attributes/relhtml.elements.link.rel.expecthttps://nowyoucanuse.com/features--link-rel-expect.html