fix: incoming options not merge with default options

Author: Scrum

index.js

@@ -26,7 +26,7 @@ function postHTMLParser(html, options) {
     };
 
     function parserDirective(name, data) {
-        var directives = options.directives || defaultDirectives;
+        var directives = objectAssign(defaultDirectives, options.directives);
         var last = bufArray.last();
 
         for (var i = 0; i < directives.length; i++) {
@@ -113,10 +113,10 @@ function postHTMLParser(html, options) {
 }
 
 function parserWrapper() {
-    var option;
+    var option = {};
 
     function parser(html) {
-        var opt = option || defaultOptions;
+        var opt = objectAssign(defaultOptions, option);
         return postHTMLParser(html, opt);
     }