fixes

src/compile/nodes/Attribute.ts

@@ -16,7 +16,6 @@ export default class Attribute extends Node {
 	name: string;
 	isSpread: boolean;
 	isTrue: boolean;
-	isConcatenated: boolean;
 	isDynamic: boolean;
 	isSynthetic: boolean;
 	shouldCache: boolean;
@@ -39,7 +38,6 @@ export default class Attribute extends Node {
 
 			this.isDynamic = true; // TODO not necessarily
 			this.shouldCache = false; // TODO does this mean anything here?
-			this.isConcatenated = false;
 		}
 
 		else {
@@ -67,8 +65,6 @@ export default class Attribute extends Node {
 					? this.chunks[0].node.type !== 'Identifier' || scope.names.has(this.chunks[0].node.name)
 					: true
 				: false;
-
-			this.isConcatenated = this.chunks.length > 1;
 		}
 	}
 

src/compile/render-ssr/handlers/Element.ts

@@ -109,13 +109,13 @@ export default function(node, renderer, options) {
 			} else if (attribute.name === 'class' && classExpr) {
 				addClassAttribute = false;
 				openingTag += ` class="\${[\`${stringifyAttribute(attribute)}\`, ${classExpr}].join(' ').trim() }"`;
-			} else if (attribute.isConcatenated || !attribute.isDynamic) {
-				openingTag += ` ${attribute.name}="${stringifyAttribute(attribute)}"`;
-			} else {
+			} else if (attribute.chunks.length === 1 && attribute.chunks[0].type !== 'Text') {
 				const { name } = attribute;
 				const { snippet } = attribute.chunks[0];
 
-				openingTag += '${(v => v == null ? "" : ` ' + name + '=${' + snippet + '}`)(' + snippet + ')}';
+				openingTag += '${(v => v == null ? "" : ` ' + name + '="${@escape(' + snippet + ')}"`)(' + snippet + ')}';
+			} else {
+				openingTag += ` ${attribute.name}="${stringifyAttribute(attribute)}"`;
 			}
 		});
 	}