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Export prefetch

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This commit is contained in:
Emil Tholin
2018-01-03 18:39:51 +01:00
parent 5da9d0926a
commit e87ac1f367
1 changed files with 12 additions and 8 deletions
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20
src/runtime/index.ts
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@@ -164,20 +164,24 @@ let prefetching: {
promise: Promise<{ Component: ComponentConstructor, data: any }>; promise: Promise<{ Component: ComponentConstructor, data: any }>;
} = null; } = null;
function prefetch(event: MouseEvent | TouchEvent) { export function prefetch(href: string) {
const a: HTMLAnchorElement = <HTMLAnchorElement>findAnchor(<Node>event.target); const selected = select_route(new URL(href));
if (!a || a.rel !== 'prefetch') return;
const selected = select_route(new URL(a.href));
if (selected) { if (selected) {
prefetching = { prefetching = {
href: a.href, href,
promise: selected.route.load().then(mod => prepare_route(mod.default, selected.data)) promise: selected.route.load().then(mod => prepare_route(mod.default, selected.data))
}; };
} }
} }
function handle_touchstart_mouseover(event: MouseEvent | TouchEvent) {
const a: HTMLAnchorElement = <HTMLAnchorElement>findAnchor(<Node>event.target);
if (!a || a.rel !== 'prefetch') return;
prefetch(a.href);
}
let inited: boolean; let inited: boolean;
export function init(_target: Node, _routes: Route[]) { export function init(_target: Node, _routes: Route[]) {
@@ -189,8 +193,8 @@ export function init(_target: Node, _routes: Route[]) {
window.addEventListener('popstate', handle_popstate); window.addEventListener('popstate', handle_popstate);
// prefetch // prefetch
window.addEventListener('touchstart', prefetch); window.addEventListener('touchstart', handle_touchstart_mouseover);
window.addEventListener('mouseover', prefetch); window.addEventListener('mouseover', handle_touchstart_mouseover);
inited = true; inited = true;
} }