From f97601ff1d40c9b01d6954e2ac365aa6ff541ca5 Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Wed, 16 May 2018 21:55:14 -0400
Subject: [PATCH] always create outro method for top-level block - fixes #1470

---
 src/compile/dom/index.ts                          |  4 ++++
 .../if-block-component-without-outro/Widget.html  |  1 +
 .../if-block-component-without-outro/_config.js   | 15 +++++++++++++++
 .../if-block-component-without-outro/main.html    | 11 +++++++++++
 4 files changed, 31 insertions(+)
 create mode 100644 test/runtime/samples/if-block-component-without-outro/Widget.html
 create mode 100644 test/runtime/samples/if-block-component-without-outro/_config.js
 create mode 100644 test/runtime/samples/if-block-component-without-outro/main.html

diff --git a/src/compile/dom/index.ts b/src/compile/dom/index.ts
index dc47f76392..543562e589 100644
--- a/src/compile/dom/index.ts
+++ b/src/compile/dom/index.ts
@@ -55,6 +55,10 @@ export default function dom(
 	compiler.fragment.build();
 	const { block } = compiler.fragment;
 
+	if (compiler.options.nestedTransitions) {
+		block.hasOutroMethod = true;
+	}
+
 	// prevent fragment being created twice (#1063)
 	if (options.customElement) block.builders.create.addLine(`this.c = @noop;`);
 
diff --git a/test/runtime/samples/if-block-component-without-outro/Widget.html b/test/runtime/samples/if-block-component-without-outro/Widget.html
new file mode 100644
index 0000000000..c66687863a
--- /dev/null
+++ b/test/runtime/samples/if-block-component-without-outro/Widget.html
@@ -0,0 +1 @@
+<div>A wild component appears</div>
\ No newline at end of file
diff --git a/test/runtime/samples/if-block-component-without-outro/_config.js b/test/runtime/samples/if-block-component-without-outro/_config.js
new file mode 100644
index 0000000000..c071648432
--- /dev/null
+++ b/test/runtime/samples/if-block-component-without-outro/_config.js
@@ -0,0 +1,15 @@
+export default {
+	skipIntroByDefault: true,
+	nestedTransitions: true,
+
+	data: {
+		foo: true,
+	},
+
+	html: '<div>A wild component appears</div>',
+
+	test(assert, component, target) {
+		component.set({ foo: false });
+		assert.htmlEqual(target.innerHTML, '');
+	},
+};
diff --git a/test/runtime/samples/if-block-component-without-outro/main.html b/test/runtime/samples/if-block-component-without-outro/main.html
new file mode 100644
index 0000000000..f043b3644a
--- /dev/null
+++ b/test/runtime/samples/if-block-component-without-outro/main.html
@@ -0,0 +1,11 @@
+{#if foo}
+	<Widget/>
+{/if}
+
+<script>
+	export default {
+		components: {
+			Widget: './Widget.html'
+		}
+	};
+</script>
\ No newline at end of file