add test for navigator online

test/js/samples/window-binding-online/expected.js

@@ -0,0 +1,53 @@
+/* generated by Svelte vX.Y.Z */
+import {
+	SvelteComponent,
+	add_render_callback,
+	init,
+	listen,
+	noop,
+	run_all,
+	safe_not_equal
+} from "svelte/internal";
+
+function create_fragment(ctx) {
+	var dispose;
+
+	add_render_callback(ctx.onlinestatuschanged);
+
+	return {
+		c() {
+			dispose = [
+				listen(window, "online", ctx.onlinestatuschanged),
+				listen(window, "offline", ctx.onlinestatuschanged)
+			];
+		},
+
+		m: noop,
+		p: noop,
+		i: noop,
+		o: noop,
+
+		d(detaching) {
+			run_all(dispose);
+		}
+	};
+}
+
+function instance($$self, $$props, $$invalidate) {
+	let online;
+
+	function onlinestatuschanged() {
+		$$invalidate('online', online = navigator.onLine);
+	}
+
+	return { online, onlinestatuschanged };
+}
+
+class Component extends SvelteComponent {
+	constructor(options) {
+		super();
+		init(this, options, instance, create_fragment, safe_not_equal, []);
+	}
+}
+
+export default Component;

test/js/samples/window-binding-online/input.svelte

@@ -0,0 +1,5 @@
+<script>
+	let online;
+</script>
+
+<svelte:window bind:online={online}/>