tidy

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

@@ -15,7 +15,7 @@ import create_debugging_comment from './shared/create_debugging_comment';
 export default class SlotWrapper extends Wrapper {
 	node: Slot;
 	fragment: FragmentWrapper;
-	fallback: Block | null;
+	fallback: Block | null = null;
 
 	var: Identifier = { type: 'Identifier', name: 'slot' };
 	dependencies: Set<string> = new Set(['$$scope']);
@@ -32,7 +32,6 @@ export default class SlotWrapper extends Wrapper {
 		this.cannot_use_innerhtml();
 		this.not_static_content();
 
-		this.fallback = null;
 		if (this.node.children.length) {
 			this.fallback = block.child({
 				comment: create_debugging_comment(this.node.children[0], this.renderer.component),
@@ -153,19 +152,18 @@ export default class SlotWrapper extends Wrapper {
 			b`@transition_out(${slot_or_fallback}, #local);`
 		);
 
-		const dynamic_dependencies = Array.from(this.dependencies).filter(name => {
+		const is_dependency_dynamic = name => {
 			if (name === '$$scope') return true;
 			if (this.node.scope.is_let(name)) return true;
 			const variable = renderer.component.var_lookup.get(name);
 			return is_dynamic(variable);
-		});
+		};
 
-		const fallback_dynamic_dependencies = this.fallback ? Array.from(this.fallback.dependencies).filter(name => {
-			if (name === '$$scope') return true;
-			if (this.node.scope.is_let(name)) return true;
-			const variable = renderer.component.var_lookup.get(name);
-			return is_dynamic(variable);
-		}) : [];
+		const dynamic_dependencies = Array.from(this.dependencies).filter(is_dependency_dynamic);
+
+		const fallback_dynamic_dependencies = this.fallback
+			? Array.from(this.fallback.dependencies).filter(is_dependency_dynamic)
+			: [];
 
 		const slot_update = b`
 			if (${slot}.p && ${renderer.dirty(dynamic_dependencies)}) {

test/runtime/samples/component-slot-fallback-2/Inner.svelte

@@ -1,6 +1,6 @@
 <script>
-  import {model} from "./store.svelte"
-  export let value = '';
+	import { model } from "./store.svelte";
+	export let value = '';
 </script>
 
 <input bind:value={$model} />

test/runtime/samples/component-slot-fallback-2/Outer.svelte

@@ -1,7 +1,7 @@
 <script>
-  import Inner from "./Inner.svelte"
-  export let defaultValue = '';
-  export let slotProps = '';
+	import Inner from "./Inner.svelte";
+	export let defaultValue = '';
+	export let slotProps = '';
 </script>
 
 <slot {slotProps}><Inner value={defaultValue} /></slot>

test/runtime/samples/component-slot-fallback-2/store.svelte

@@ -1,16 +1,16 @@
 <script context="module">
   let value = 'Blub';
   let count = 0;
-  let subscribers = new Set();
+  const subscribers = new Set();
   export const model = {
     subscribe(fn) {
       subscribers.add(fn);
       count ++;
       fn(value);
       return () => {
-        count --;
+        count--;
         subscribers.delete(fn);
-      }
+      };
     },
     set(v) {
       value = v;
@@ -19,5 +19,5 @@
     getCount() {
       return count;
     }
-  }
+  };
 </script>