From e87ac1f36705814fb3cd7a03bee12f61010ce14e Mon Sep 17 00:00:00 2001
From: Emil Tholin <emtholin@gmail.com>
Date: Wed, 3 Jan 2018 18:39:51 +0100
Subject: [PATCH] Export prefetch

---
 src/runtime/index.ts | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/runtime/index.ts b/src/runtime/index.ts
index f0e9600..02f15ae 100644
--- a/src/runtime/index.ts
+++ b/src/runtime/index.ts
@@ -164,20 +164,24 @@ let prefetching: {
 	promise: Promise<{ Component: ComponentConstructor, data: any }>;
 } = null;
 
-function prefetch(event: MouseEvent | TouchEvent) {
-	const a: HTMLAnchorElement = <HTMLAnchorElement>findAnchor(<Node>event.target);
-	if (!a || a.rel !== 'prefetch') return;
-
-	const selected = select_route(new URL(a.href));
+export function prefetch(href: string) {
+	const selected = select_route(new URL(href));
 
 	if (selected) {
 		prefetching = {
-			href: a.href,
+			href,
 			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;
 
 export function init(_target: Node, _routes: Route[]) {
@@ -189,8 +193,8 @@ export function init(_target: Node, _routes: Route[]) {
 		window.addEventListener('popstate', handle_popstate);
 
 		// prefetch
-		window.addEventListener('touchstart', prefetch);
-		window.addEventListener('mouseover', prefetch);
+		window.addEventListener('touchstart', handle_touchstart_mouseover);
+		window.addEventListener('mouseover', handle_touchstart_mouseover);
 
 		inited = true;
 	}