[fix] mapがあるとは限らない

Author: kogai

lib/loader.js

@@ -9,21 +9,24 @@ var escapeRegexp = require("escape-regexp");
 var processCss = require("./processCss");
 var getImportPrefix = require("./getImportPrefix");
 
-const pathtoSprites = path.resolve('client/images/sprites');
-const nestedImport = escapeRegexp('../../../styles');
-
 module.exports = function(content, map) {
 	// ワークアラウンド
 	// postcss-spritesに各コンポーネント用のsprite.pngを渡す方法がわからない
-	const parsedMap = JSON.parse(map);
-	const hasSprite = content.match(/url\(client\/images\/sprites/) ? true : false;
-	const isNested = parsedMap.sources.filter((source)=> source.match(nestedImport)).length > 0;
+	if (map) {
+		var pathtoSprites = path.resolve('client/images/sprites');
+		var nestedImport = escapeRegexp('../../../styles');
+		var parsedMap = JSON.parse(map);
+		var hasSprite = content.match(/url\(client\/images\/sprites/) ? true : false;
+		var isNested = parsedMap.sources.filter(function(source) {
+			return source.match(nestedImport)
+		}).length > 0;
 
-	if (hasSprite) {
-		if (isNested) {
-			content = content.replace(/url\(client\/images\/sprites\//g, 'url(../../../images/sprites/');
-		} else {
-			content = content.replace(/url\(client\/images\/sprites\//g, 'url(../../images/sprites/');
+		if (hasSprite) {
+			if (isNested) {
+				content = content.replace(/url\(client\/images\/sprites\//g, 'url(../../../images/sprites/');
+			} else {
+				content = content.replace(/url\(client\/images\/sprites\//g, 'url(../../images/sprites/');
+			}
 		}
 	}