more binding stuff

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

@@ -141,6 +141,7 @@ export default class EachBlockWrapper extends Wrapper {
 			this.block.bindings.set(prop.key.name, {
 				object: this.vars.each_block_value,
 				property: this.index_name,
+				modifier: prop.modifier,
 				snippet: prop.modifier(x`${this.vars.each_block_value}[${this.index_name}]` as Node),
 				store,
 				tail: prop.modifier(x`[${this.index_name}]` as Node)

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

@@ -244,29 +244,33 @@ function get_event_handler(
 	const contextual_dependencies = new Set(binding.node.expression.contextual_dependencies);
 
 	const context = block.bindings.get(name);
+	let set_store;
 
 	if (context) {
-		const { object, property } = context;
+		const { object, property, modifier, store } = context;
 
 		if (lhs.type === 'Identifier') {
-			lhs = x`${object}[${property}]`;
+			lhs = modifier(x`${object}[${property}]`);
 
 			contextual_dependencies.add(object.name);
 			contextual_dependencies.add(property.name);
 		}
-	}
-
-	let mutation = b`${lhs} = ${value}`;
 
+		if (store) {
+			set_store = b`${store}.set(${object.name});`;
+		}
+	} else {
 		const object = get_object(lhs);
 		if (object.name[0] === '$') {
 			const store = object.name.slice(1);
+			set_store = b`${store}.set(${object.name});`;
+		}
+	}
 
-		mutation = b`
-			${mutation}
-			${store}.set(${object.name});
+	let mutation = b`
+		${lhs} = ${value};
+		${set_store}
 	`;
-	}
 
 	return {
 		uses_context: binding.node.is_contextual || binding.node.expression.uses_context, // TODO this is messy