Add store data to bindings

src/compiler/compile/render_dom/Block.ts

@@ -10,7 +10,7 @@ export interface BlockOptions {
 	renderer?: Renderer;
 	comment?: string;
 	key?: string;
-	bindings?: Map<string, { object: string; property: string; snippet: string }>;
+	bindings?: Map<string, { object: string; property: string; snippet: string; store: string; tail: string }>;
 	dependencies?: Set<string>;
 }
 
@@ -27,7 +27,7 @@ export default class Block {
 
 	dependencies: Set<string>;
 
-	bindings: Map<string, { object: string; property: string; snippet: string }>;
+	bindings: Map<string, { object: string; property: string; snippet: string; store: string; tail: string }>;
 
 	builders: {
 		init: CodeBuilder;

src/compiler/compile/render_dom/wrappers/EachBlock.ts

@@ -121,11 +121,15 @@ export default class EachBlockWrapper extends Wrapper {
 			view_length: fixed_length === null ? `${iterations}.[✂${c}-${c+4}✂]` : fixed_length
 		};
 
+		const store = node.expression.node.name[0] === '$' ? node.expression.node.name.slice(1) : null;
+
 		node.contexts.forEach(prop => {
 			this.block.bindings.set(prop.key.name, {
 				object: this.vars.each_block_value,
 				property: this.index_name,
-				snippet: attach_head(`${this.vars.each_block_value}[${this.index_name}]`, prop.tail)
+				snippet: attach_head(`${this.vars.each_block_value}[${this.index_name}]`, prop.tail),
+				store,
+				tail: attach_head(`[${this.index_name}]`, prop.tail)
 			});
 		});
 

src/compiler/compile/render_dom/wrappers/Element/Binding.ts

@@ -249,7 +249,7 @@ function get_event_handler(
 		snippet?: string;
 	} {
 	const value = get_value_from_dom(renderer, binding.parent, binding);
-	const store = binding.object[0] === '$' ? binding.object.slice(1) : null;
+	let store = binding.object[0] === '$' ? binding.object.slice(1) : null;
 
 	let tail = '';
 	if (binding.node.expression.node.type === 'MemberExpression') {
@@ -258,7 +258,13 @@ function get_event_handler(
 	}
 
 	if (binding.node.is_contextual) {
-		const { object, property, snippet } = block.bindings.get(name);
+		const binding = block.bindings.get(name);
+		const { object, property, snippet } = binding;
+
+		if (binding.store) {
+			store = store || binding.store;
+			tail = `${binding.tail}${tail}`;
+		}
 
 		return {
 			uses_context: true,