diff --git a/js/lib/beautify-html.js b/js/lib/beautify-html.js
index bf87f9808..efc4061c0 100644
--- a/js/lib/beautify-html.js
+++ b/js/lib/beautify-html.js
@@ -128,7 +128,7 @@
         wrap_attributes = (options.wrap_attributes === undefined) ? 'auto' : options.wrap_attributes;
         wrap_attributes_indent_size = (options.wrap_attributes_indent_size === undefined) ? indent_size : parseInt(options.wrap_attributes_indent_size, 10) || indent_size;
         end_with_newline = (options.end_with_newline === undefined) ? false : options.end_with_newline;
-        extra_liners = Array.isArray(options.extra_liners) ?
+        extra_liners = (typeof options.extra_liners == 'object') && options.extra_liners ?
             options.extra_liners.concat() : (typeof options.extra_liners === 'string') ?
             options.extra_liners.split(',') : 'head,body,/html'.split(',');
         eol = options.eol ? options.eol : '\n';
@@ -435,15 +435,15 @@
 
                 if (tag_complete.indexOf(' ') !== -1) { //if there's whitespace, thats where the tag name ends
                     tag_index = tag_complete.indexOf(' ');
-                } else if (tag_complete[0] === '{') {
+                } else if (tag_complete.charAt(0) === '{') {
                     tag_index = tag_complete.indexOf('}');
                 } else { //otherwise go with the tag ending
                     tag_index = tag_complete.indexOf('>');
                 }
-                if (tag_complete[0] === '<' || !indent_handlebars) {
+                if (tag_complete.charAt(0) === '<' || !indent_handlebars) {
                     tag_offset = 1;
                 } else {
-                    tag_offset = tag_complete[2] === '#' ? 3 : 2;
+                    tag_offset = tag_complete.charAt(2) === '#' ? 3 : 2;
                 }
                 var tag_check = tag_complete.substring(tag_offset, tag_index).toLowerCase();
                 if (tag_complete.charAt(tag_complete.length - 2) === '/' ||
@@ -451,7 +451,7 @@
                     if (!peek) {
                         this.tag_type = 'SINGLE';
                     }
-                } else if (indent_handlebars && tag_complete[0] === '{' && tag_check === 'else') {
+                } else if (indent_handlebars && tag_complete.charAt(0) === '{' && tag_check === 'else') {
                     if (!peek) {
                         this.indent_to_tag('if');
                         this.tag_type = 'HANDLEBARS_ELSE';
@@ -531,7 +531,7 @@
                     comment += input_char;
 
                     // only need to check for the delimiter if the last chars match
-                    if (comment[comment.length - 1] === delimiter[delimiter.length - 1] &&
+                    if (comment.charAt(comment.length - 1) === delimiter.charAt(delimiter.length - 1) &&
                         comment.indexOf(delimiter) !== -1) {
                         break;
                     }
@@ -608,7 +608,7 @@
                     this.line_char_count++;
                     space = true;
 
-                    if (indent_handlebars && input_char === '{' && content.length && content[content.length - 2] === '{') {
+                    if (indent_handlebars && input_char === '{' && content.length && content.charAt(content.length - 2) === '{') {
                         // Handlebars expressions in strings should also be unformatted.
                         content += this.get_unformatted('}}');
                         // These expressions are opaque.  Ignore delimiters found in them.
@@ -747,7 +747,7 @@
                     }
 
                     if (text && text !== '') {
-                        if (text.length > 1 && text[text.length - 1] === '\n') {
+                        if (text.length > 1 && text.charAt(text.length - 1) === '\n') {
                             // unformatted tags can grab newlines as their last character
                             this.output.push(text.slice(0, -1));
                             this.print_newline(false, this.output);
@@ -869,8 +869,11 @@
                         if (_beautifier) {
 
                             // call the Beautifier if avaliable
-                            var child_options = JSON.parse(JSON.stringify(options));
-                            child_options.eol = '\n';
+                            var Child_options = function() {
+                                this.eol = '\n';
+                            };
+                            Child_options.prototype = options;
+                            var child_options = new Child_options();
                             text = _beautifier(text.replace(/^\s*/, indentation), child_options);
                         } else {
                             // simply indent the string otherwise
diff --git a/js/test/beautify-css-tests.js b/js/test/beautify-css-tests.js
index e955bf359..e89d3dc29 100644
--- a/js/test/beautify-css-tests.js
+++ b/js/test/beautify-css-tests.js
@@ -14,7 +14,7 @@ function run_css_tests(test_obj, Urlencoded, js_beautify, html_beautify, css_bea
         break_chained_methods: false,
         selector_separator: '\n',
         end_with_newline: false,
-        newline_between_rules: true,
+        newline_between_rules: true
     };
 
     function test_css_beautifier(input)
diff --git a/test/template/node-css.mustache b/test/template/node-css.mustache
index 522ffc8a6..f806a9150 100644
--- a/test/template/node-css.mustache
+++ b/test/template/node-css.mustache
@@ -14,7 +14,7 @@ function run_css_tests(test_obj, Urlencoded, js_beautify, html_beautify, css_bea
         break_chained_methods: false,
         selector_separator: '\n',
         end_with_newline: false,
-        newline_between_rules: true,
+        newline_between_rules: true
     };
 
     function test_css_beautifier(input)