From d7dbecc9938270f37e097652fe1c6db94d81a747 Mon Sep 17 00:00:00 2001
From: Fabrice Weinberg <Fabrice@weinberg.me>
Date: Wed, 7 Dec 2016 14:39:45 +0100
Subject: [PATCH] Switch from Map to Set

---
 compiler/parse/state/tag.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/compiler/parse/state/tag.js b/compiler/parse/state/tag.js
index 7d9ff77836..c7902535a0 100644
--- a/compiler/parse/state/tag.js
+++ b/compiler/parse/state/tag.js
@@ -74,7 +74,7 @@ export default function tag ( parser ) {
 	}
 
 	const attributes = [];
-	const uniqueNames = new Map();
+	const uniqueNames = new Set();
 
 	let attribute;
 	while ( attribute = readAttribute( parser, uniqueNames ) ) {
@@ -139,11 +139,11 @@ function readAttribute ( parser, uniqueNames ) {
 
 	const name = parser.readUntil( /(\s|=|\/|>)/ );
 	if ( !name ) return null;
-	if ( uniqueNames.has(name) ) {
+	if ( uniqueNames.has( name ) ) {
 		parser.error( 'Attributes need to be unique', start );
 	}
 
-	uniqueNames.set(name, true);
+	uniqueNames.add( name );
 
 	parser.allowWhitespace();