enable <:Window bind:online/> - fixes #936 (#937)

src/validate/html/validateWindow.ts

@@ -12,6 +12,7 @@ const validBindings = [
 	'outerHeight',
 	'scrollX',
 	'scrollY',
+	'online'
 ];
 
 export default function validateWindow(validator: Validator, node: Node, refs: Map<string, Node[]>, refCallees: Node[]) {

test/validator/samples/window-binding-invalid/errors.json

@@ -1,5 +1,5 @@
 [{
-	"message": "'potato' is not a valid binding on <:Window> — valid bindings are innerWidth, innerHeight, outerWidth, outerHeight, scrollX or scrollY",
+	"message": "'potato' is not a valid binding on <:Window> — valid bindings are innerWidth, innerHeight, outerWidth, outerHeight, scrollX, scrollY or online",
 	"loc": {
 		"line": 1,
 		"column": 9

test/validator/samples/window-binding-online/errors.json

@@ -0,0 +1 @@
+[]

test/validator/samples/window-binding-online/input.html

@@ -0,0 +1 @@
+<:Window bind:online/>