From e3cc811d2f86dd596f462393b130c9931e3ae852 Mon Sep 17 00:00:00 2001
From: syedosamamaruf <syedosamamaruf@gmail.com>
Date: Tue, 24 Mar 2020 19:52:47 +0500
Subject: [PATCH] exposed view port scroll event

---
 VirtualList.svelte | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/VirtualList.svelte b/VirtualList.svelte
index c92f65a..c6f6925 100644
--- a/VirtualList.svelte
+++ b/VirtualList.svelte
@@ -1,5 +1,7 @@
 <script>
-	import { onMount, tick } from 'svelte';
+	import { onMount, tick, createEventDispatcher } from 'svelte';
+
+	const dispatch = createEventDispatcher();
 
 	// props
 	export let items;
@@ -64,7 +66,7 @@
 
 	}
 
-	async function handle_scroll() {
+	async function handle_scroll(event) {
 		const { scrollTop } = viewport;
 
 		const old_start = start;
@@ -122,6 +124,8 @@
 			viewport.scrollTo(0, scrollTop + d);
 		}
 
+		dispatch('scroll', event);
+
 		// TODO if we overestimated the space these
 		// rows would occupy we may need to add some
 		// more. maybe we can just call handle_scroll again?