Styles — spf.style

The style manager: constructable stylesheets (document.adoptedStyleSheets) with a <link> fallback where adoption can't apply (cross-origin/CSP). See the Resources guide; version switching is covered in Versioning.

Methods

load(url, name?)

function load(url: string, name?: string): Promise<CSSStyleSheet | HTMLLinkElement>;

Loads a stylesheet once (deduped by name or URL) and applies it. Returns the adopted CSSStyleSheet, or the fallback HTMLLinkElement when the fetch or adoption failed (cross-origin/CSP).

await spf.style.load('/theme/dark.css', 'theme-dark');

prefetch(url)

function prefetch(url: string): void;

Requests a stylesheet without applying it, priming the browser cache with a <link rel="preload" as="style">.

unload(name)

function unload(name: string): void;

Removes a managed stylesheet from the page: un-adopts a CSSStyleSheet or removes the fallback <link> element.

isLoaded(name)

function isLoaded(name: string): boolean;

Whether a name is currently registered.