make event handler names unique across components - fixes #1919

src/compile/render-dom/wrappers/Element/index.ts

@@ -410,7 +410,7 @@ export default class ElementWrapper extends Wrapper {
 			.filter(group => group.bindings.length);
 
 		groups.forEach(group => {
-			const handler = block.getUniqueName(`${this.var}_${group.events.join('_')}_handler`);
+			const handler = renderer.component.getUniqueName(`${this.var}_${group.events.join('_')}_handler`);
 			renderer.component.declarations.push(handler);
 			renderer.component.template_references.add(handler);
 

test/runtime/samples/binding-input-text-contextual-deconflicted/_config.js

@@ -0,0 +1,37 @@
+export default {
+	props: {
+		foo: 'a',
+		items: ['x'],
+	},
+
+	html: `
+		<div><input><p>a</p></div>
+		<div><input><p>x</p></div>
+	`,
+
+	ssrHtml: `
+		<div><input value=a><p>a</p></div>
+		<div><input value=x><p>x</p></div>
+	`,
+
+	async test({ assert, component, target, window }) {
+		const inputs = [...target.querySelectorAll('input')];
+		const items = component.items;
+		const event = new window.Event('input');
+
+		assert.equal(inputs[0].value, 'a');
+
+		inputs[0].value = 'b';
+		inputs[1].value = 'y';
+		await inputs[0].dispatchEvent(event);
+		await inputs[1].dispatchEvent(event);
+
+		assert.equal(component.foo, 'b');
+		assert.equal(component.items[0], 'y');
+
+		assert.htmlEqual(target.innerHTML, `
+			<div><input><p>b</p></div>
+			<div><input><p>y</p></div>
+		`);
+	},
+};

test/runtime/samples/binding-input-text-contextual-deconflicted/main.html

@@ -0,0 +1,5 @@
+<div><input bind:value={foo}><p>{foo}</p></div>
+
+{#each items as bar}
+	<div><input bind:value={bar}><p>{bar}</p></div>
+{/each}