From ea74bfec554a9fba50d5d5ab803f96bd63fe83ba Mon Sep 17 00:00:00 2001
From: Mikhail Korepanov <panyakor@gmail.com>
Date: Sun, 16 Jun 2019 13:37:28 +0300
Subject: [PATCH] Allow whitespace after = in attributes (#3026)

---
 src/compiler/parse/state/tag.ts               |  1 +
 .../attribute-with-whitespace/input.svelte    |  1 +
 .../attribute-with-whitespace/output.json     | 39 +++++++++++++++++++
 3 files changed, 41 insertions(+)
 create mode 100644 test/parser/samples/attribute-with-whitespace/input.svelte
 create mode 100644 test/parser/samples/attribute-with-whitespace/output.json

diff --git a/src/compiler/parse/state/tag.ts b/src/compiler/parse/state/tag.ts
index 2fb82b4d2e..907233fdc7 100644
--- a/src/compiler/parse/state/tag.ts
+++ b/src/compiler/parse/state/tag.ts
@@ -385,6 +385,7 @@ function read_attribute(parser: Parser, unique_names: Set<string>) {
 
 	let value: any[] | true = true;
 	if (parser.eat('=')) {
+		parser.allow_whitespace();
 		value = read_attribute_value(parser);
 		end = parser.index;
 	} else if (parser.match_regex(/["']/)) {
diff --git a/test/parser/samples/attribute-with-whitespace/input.svelte b/test/parser/samples/attribute-with-whitespace/input.svelte
new file mode 100644
index 0000000000..2743a89ed0
--- /dev/null
+++ b/test/parser/samples/attribute-with-whitespace/input.svelte
@@ -0,0 +1 @@
+<button on:click= {foo}>Click</button>
diff --git a/test/parser/samples/attribute-with-whitespace/output.json b/test/parser/samples/attribute-with-whitespace/output.json
new file mode 100644
index 0000000000..eab6054f2a
--- /dev/null
+++ b/test/parser/samples/attribute-with-whitespace/output.json
@@ -0,0 +1,39 @@
+{
+	"html": {
+		"start": 0,
+		"end": 38,
+		"type": "Fragment",
+		"children": [
+			{
+				"start": 0,
+				"end": 38,
+				"type": "Element",
+				"name": "button",
+				"attributes": [
+					{
+						"start": 8,
+						"end": 23,
+						"type": "EventHandler",
+						"name": "click",
+						"modifiers": [],
+						"expression": {
+							"type": "Identifier",
+							"start": 19,
+							"end": 22,
+							"name": "foo"
+						}
+					}
+				],
+				"children": [
+					{
+						"start": 24,
+						"end": 29,
+						"type": "Text",
+						"raw": "Click",
+						"data": "Click"
+					}
+				]
+			}
+		]
+	}
+}