diff --git a/mocha.opts b/mocha.opts
index af6b17a845..427b029758 100644
--- a/mocha.opts
+++ b/mocha.opts
@@ -1,2 +1 @@
---bail
 test/test.js
\ No newline at end of file
diff --git a/src/compile/nodes/Element.ts b/src/compile/nodes/Element.ts
index 9fa630124e..33955919ee 100644
--- a/src/compile/nodes/Element.ts
+++ b/src/compile/nodes/Element.ts
@@ -658,10 +658,10 @@ export default class Element extends Node {
 		const slot = this.attributes.find(attribute => attribute.name === 'slot');
 		if (slot) {
 			const prop = quotePropIfNecessary(slot.chunks[0].data);
-			return `@append(${name}._slotted${prop}, ${this.var});`;
+			return `@append(${name}.$$slotted${prop}, ${this.var});`;
 		}
 
-		return `@append(${name}._slotted.default, ${this.var});`;
+		return `@append(${name}.$$slotted.default, ${this.var});`;
 	}
 
 	addCssClass(className = this.component.stylesheet.id) {
diff --git a/src/compile/nodes/Transition.ts b/src/compile/nodes/Transition.ts
index 6e16c57f97..5e6aa922d2 100644
--- a/src/compile/nodes/Transition.ts
+++ b/src/compile/nodes/Transition.ts
@@ -10,13 +10,6 @@ export default class Transition extends Node {
 	constructor(component, parent, scope, info) {
 		super(component, parent, scope, info);
 
-		if (!component.transitions.has(info.name)) {
-			component.error(info, {
-				code: `missing-transition`,
-				message: `Missing transition '${info.name}'`
-			});
-		}
-
 		this.name = info.name;
 		this.directive = info.intro && info.outro ? 'transition' : info.intro ? 'in' : 'out';
 
diff --git a/src/compile/nodes/shared/Node.ts b/src/compile/nodes/shared/Node.ts
index ca56375962..4ce51b46c9 100644
--- a/src/compile/nodes/shared/Node.ts
+++ b/src/compile/nodes/shared/Node.ts
@@ -51,7 +51,7 @@ export default class Node {
 	}
 
 	remount(name: string) {
-		return `${this.var}.m(${name}._slotted.default, null);`;
+		return `${this.var}.m(${name}.$$slotted.default, null);`;
 	}
 
 	warnIfEmptyBlock() {
diff --git a/src/compile/render-dom/index.ts b/src/compile/render-dom/index.ts
index 95c109e0a3..fe584a7d45 100644
--- a/src/compile/render-dom/index.ts
+++ b/src/compile/render-dom/index.ts
@@ -88,8 +88,8 @@ export default function dom(
 
 				${renderer.slots.size && deindent`
 					connectedCallback() {
-						Object.keys(this._slotted).forEach(key => {
-							this.appendChild(this._slotted[key]);
+						Object.keys(this.$$slotted).forEach(key => {
+							this.appendChild(this.$$slotted[key]);
 						});
 					}`}
 
diff --git a/src/compile/render-dom/wrappers/EachBlock.ts b/src/compile/render-dom/wrappers/EachBlock.ts
index 94e20f5d53..bc274e7032 100644
--- a/src/compile/render-dom/wrappers/EachBlock.ts
+++ b/src/compile/render-dom/wrappers/EachBlock.ts
@@ -501,6 +501,6 @@ export default class EachBlockWrapper extends Wrapper {
 
 	remount(name: string) {
 		// TODO consider keyed blocks
-		return `for (var #i = 0; #i < ${this.vars.iterations}.length; #i += 1) ${this.vars.iterations}[#i].m(${name}._slotted.default, null);`;
+		return `for (var #i = 0; #i < ${this.vars.iterations}.length; #i += 1) ${this.vars.iterations}[#i].m(${name}.$$slotted.default, null);`;
 	}
 }
\ No newline at end of file
diff --git a/src/compile/render-dom/wrappers/Element/index.ts b/src/compile/render-dom/wrappers/Element/index.ts
index e530d4f1aa..8cfb224416 100644
--- a/src/compile/render-dom/wrappers/Element/index.ts
+++ b/src/compile/render-dom/wrappers/Element/index.ts
@@ -174,6 +174,9 @@ export default class ElementWrapper extends Wrapper {
 		});
 
 		if (this.parent) {
+			// console.log(`has intro ${!!node.intro}`);
+			// console.log(`has outro ${!!node.outro}`);
+
 			if (node.actions.length > 0) this.parent.cannotUseInnerHTML();
 			if (node.animation) this.parent.cannotUseInnerHTML();
 			if (node.bindings.length > 0) this.parent.cannotUseInnerHTML();
@@ -211,7 +214,7 @@ export default class ElementWrapper extends Wrapper {
 		let initialMountNode;
 
 		if (this.slotOwner) {
-			initialMountNode = `${this.slotOwner.var}._slotted${prop}`;
+			initialMountNode = `${this.slotOwner.var}.$$slotted${prop}`;
 		} else {
 			initialMountNode = parentNode;
 		}
@@ -714,7 +717,7 @@ export default class ElementWrapper extends Wrapper {
 
 			block.addVariable(name);
 
-			const fn = `%transitions-${intro.name}`;
+			const fn = `ctx.${intro.name}`;
 
 			block.builders.intro.addConditional(`#component.root._intro`, deindent`
 				if (${name}) ${name}.invalidate();
@@ -744,7 +747,7 @@ export default class ElementWrapper extends Wrapper {
 					? intro.expression.snippet
 					: '{}';
 
-				const fn = `%transitions-${intro.name}`; // TODO add built-in transitions?
+				const fn = `ctx.${intro.name}`; // TODO add built-in transitions?
 
 				if (outro) {
 					block.builders.intro.addBlock(deindent`
@@ -767,7 +770,7 @@ export default class ElementWrapper extends Wrapper {
 					? outro.expression.snippet
 					: '{}';
 
-				const fn = `%transitions-${outro.name}`;
+				const fn = `ctx.${outro.name}`;
 
 				block.builders.intro.addBlock(deindent`
 					if (${outroName}) ${outroName}.abort(1);
@@ -900,10 +903,10 @@ export default class ElementWrapper extends Wrapper {
 		const slot = this.attributes.find(attribute => attribute.name === 'slot');
 		if (slot) {
 			const prop = quotePropIfNecessary(slot.chunks[0].data);
-			return `@append(${name}._slotted${prop}, ${this.var});`;
+			return `@append(${name}.$$slotted${prop}, ${this.var});`;
 		}
 
-		return `@append(${name}._slotted.default, ${this.var});`;
+		return `@append(${name}.$$slotted.default, ${this.var});`;
 	}
 
 	addCssClass(className = this.component.stylesheet.id) {
diff --git a/src/compile/render-dom/wrappers/InlineComponent/index.ts b/src/compile/render-dom/wrappers/InlineComponent/index.ts
index 07c2d99d68..fb789c5710 100644
--- a/src/compile/render-dom/wrappers/InlineComponent/index.ts
+++ b/src/compile/render-dom/wrappers/InlineComponent/index.ts
@@ -92,7 +92,7 @@ export default class InlineComponentWrapper extends Wrapper {
 			componentInitProperties.push(`slots: { ${slots.join(', ')} }`);
 
 			this.fragment.nodes.forEach((child: Wrapper) => {
-				child.render(block, `${this.var}._slotted.default`, 'nodes');
+				child.render(block, `${this.var}.$$slotted.default`, 'nodes');
 			});
 		}
 
@@ -471,7 +471,7 @@ export default class InlineComponentWrapper extends Wrapper {
 	}
 
 	remount(name: string) {
-		return `${this.var}.$$mount(${name}._slotted.default, null);`;
+		return `${this.var}.$$mount(${name}.$$slotted.default, null);`;
 	}
 }
 
diff --git a/src/compile/render-dom/wrappers/Slot.ts b/src/compile/render-dom/wrappers/Slot.ts
index 723eb9d2a4..d12464cc61 100644
--- a/src/compile/render-dom/wrappers/Slot.ts
+++ b/src/compile/render-dom/wrappers/Slot.ts
@@ -49,7 +49,7 @@ export default class SlotWrapper extends Wrapper {
 
 		const content_name = block.getUniqueName(`slot_content_${sanitize(slotName)}`);
 		const prop = quotePropIfNecessary(slotName);
-		block.addVariable(content_name, `#component._slotted${prop}`);
+		block.addVariable(content_name, `#component.$$slotted${prop}`);
 
 		// TODO can we use isDomNode instead of type === 'Element'?
 		const needsAnchorBefore = this.prev ? this.prev.node.type !== 'Element' : !parentNode;
@@ -107,7 +107,7 @@ export default class SlotWrapper extends Wrapper {
 
 		// if the slot is unmounted, move nodes back into the document fragment,
 		// so that it can be reinserted later
-		// TODO so that this can work with public API, component._slotted should
+		// TODO so that this can work with public API, component.$$slotted should
 		// be all fragments, derived from options.slots. Not === options.slots
 		const unmountLeadin = block.builders.destroy.toString() !== destroyBefore
 			? `else`
diff --git a/src/compile/render-dom/wrappers/Text.ts b/src/compile/render-dom/wrappers/Text.ts
index 3d4e99197b..a32e908f63 100644
--- a/src/compile/render-dom/wrappers/Text.ts
+++ b/src/compile/render-dom/wrappers/Text.ts
@@ -62,6 +62,6 @@ export default class TextWrapper extends Wrapper {
 	}
 
 	remount(name: string) {
-		return `@append(${name}._slotted.default, ${this.var});`;
+		return `@append(${name}.$$slotted.default, ${this.var});`;
 	}
 }
\ No newline at end of file
diff --git a/src/compile/render-dom/wrappers/shared/Tag.ts b/src/compile/render-dom/wrappers/shared/Tag.ts
index b0b5ec01c3..4829867849 100644
--- a/src/compile/render-dom/wrappers/shared/Tag.ts
+++ b/src/compile/render-dom/wrappers/shared/Tag.ts
@@ -62,6 +62,6 @@ export default class Tag extends Wrapper {
 	}
 
 	remount(name: string) {
-		return `@append(${name}._slotted.default, ${this.var});`;
+		return `@append(${name}.$$slotted.default, ${this.var});`;
 	}
 }
\ No newline at end of file
diff --git a/src/compile/render-dom/wrappers/shared/Wrapper.ts b/src/compile/render-dom/wrappers/shared/Wrapper.ts
index cc59e2b6fd..21112f3f55 100644
--- a/src/compile/render-dom/wrappers/shared/Wrapper.ts
+++ b/src/compile/render-dom/wrappers/shared/Wrapper.ts
@@ -87,6 +87,6 @@ export default class Wrapper {
 	}
 
 	remount(name: string) {
-		return `${this.var}.m(${name}._slotted.default, null);`;
+		return `${this.var}.m(${name}.$$slotted.default, null);`;
 	}
 }
\ No newline at end of file
diff --git a/src/internal/SvelteComponent.js b/src/internal/SvelteComponent.js
index 36af47e8db..9e6d64db26 100644
--- a/src/internal/SvelteComponent.js
+++ b/src/internal/SvelteComponent.js
@@ -9,6 +9,8 @@ export class SvelteComponent {
 		this.$$onupdate = [];
 		this.$$ondestroy = [];
 
+		this.$$slotted = options.slots;
+
 		set_current_component(this);
 		const [get_state, inject_props, inject_refs] = this.$$init(
 			key => this.$$make_dirty(key)
diff --git a/src/internal/transitions.js b/src/internal/transitions.js
index 8dfa50b8ff..4b039402b2 100644
--- a/src/internal/transitions.js
+++ b/src/internal/transitions.js
@@ -89,7 +89,8 @@ export function wrapTransition(component, node, fn, params, intro) {
 		},
 
 		start(program) {
-			component.fire(`${program.b ? 'intro' : 'outro'}.start`, { node });
+			// TODO find an alternative to this
+			// component.fire(`${program.b ? 'intro' : 'outro'}.start`, { node });
 
 			program.a = this.t;
 			program.delta = program.b - program.a;
@@ -128,7 +129,8 @@ export function wrapTransition(component, node, fn, params, intro) {
 
 			if (obj.tick) obj.tick(this.t, 1 - this.t);
 
-			component.fire(`${program.b ? 'intro' : 'outro'}.end`, { node });
+			// TODO find an alternative to this
+			// component.fire(`${program.b ? 'intro' : 'outro'}.end`, { node });
 
 			if (!program.b && !program.invalidated) {
 				program.group.callbacks.push(() => {
diff --git a/src/parse/state/tag.ts b/src/parse/state/tag.ts
index c9d5aece72..e6c17120a2 100644
--- a/src/parse/state/tag.ts
+++ b/src/parse/state/tag.ts
@@ -408,15 +408,28 @@ function readAttribute(parser: Parser, uniqueNames: Set<string>) {
 	const end = parser.index;
 
 	if (type) {
-		name = name.slice(colon_index + 1);
+		const directive_name = name.slice(colon_index + 1);
 
-		return {
+		const directive = {
 			start,
 			end,
 			type,
-			name,
-			[type === 'Binding' ? 'value' : 'expression']: value[0] && value[0].expression
+			name: directive_name
 		};
+
+		if (type === 'Binding') {
+			directive.value = value[0] && value[0].expression;
+		} else {
+			directive.expression = value[0] && value[0].expression;
+		}
+
+		if (type === 'Transition') {
+			const direction = name.slice(0, colon_index);
+			directive.intro = direction === 'in' || direction === 'transition';
+			directive.outro = direction === 'out' || direction === 'transition';
+		}
+
+		return directive;
 	}
 
 	return {
diff --git a/src/utils/annotateWithScopes.ts b/src/utils/annotateWithScopes.ts
index 33f083ac5f..5b0a28efb5 100644
--- a/src/utils/annotateWithScopes.ts
+++ b/src/utils/annotateWithScopes.ts
@@ -76,6 +76,11 @@ export class Scope {
 		}
 	}
 
+	findOwner(name: string): Scope {
+		if (this.declarations.has(name)) return this;
+		return this.parent && this.parent.findOwner(name);
+	}
+
 	has(name: string): boolean {
 		return (
 			this.declarations.has(name) || (this.parent && this.parent.has(name))
diff --git a/test/runtime/samples/autofocus/main.html b/test/runtime/samples/autofocus/main.html
index 8bbec2a3c5..0f108d7ba1 100644
--- a/test/runtime/samples/autofocus/main.html
+++ b/test/runtime/samples/autofocus/main.html
@@ -1,3 +1,7 @@
+<script>
+	let input;
+</script>
+
 {#if visible}
 	<input ref:input autofocus>
 {/if}
\ No newline at end of file
diff --git a/test/runtime/samples/nested-transition-detach-if-false/Folder.html b/test/runtime/samples/nested-transition-detach-if-false/Folder.html
index f0acf1533e..b37ba80b76 100644
--- a/test/runtime/samples/nested-transition-detach-if-false/Folder.html
+++ b/test/runtime/samples/nested-transition-detach-if-false/Folder.html
@@ -1,9 +1,8 @@
 <script>
 	export let dir;
 	export let open = true;
-	export let items = [];
 
-	function items() {
+	function get_items() {
 		return dir === 'a'
 			? [
 				{
@@ -25,7 +24,7 @@
 
 	{#if open}
 		<ul>
-			{#each items as item (item.filename)}
+			{#each get_items() as item (item.filename)}
 				{#if item.isDir}
 					<svelte:self dir={item.filename}/>
 				{:else}
diff --git a/test/runtime/samples/nested-transition-detach-if-false/_config.js b/test/runtime/samples/nested-transition-detach-if-false/_config.js
index 1e26a54787..de4ff2fe9f 100644
--- a/test/runtime/samples/nested-transition-detach-if-false/_config.js
+++ b/test/runtime/samples/nested-transition-detach-if-false/_config.js
@@ -16,7 +16,7 @@ export default {
 	nestedTransitions: true,
 
 	test(assert, component, target, window, raf) {
-		component.refs.folder.set({ open: false });
+		component.folder.open = false;
 		assert.htmlEqual(target.innerHTML, `
 			<li>
 				<span>a</span>