Accept multiple args in xgrids/ygrids.remove API

c3.js

@@ -4655,15 +4655,20 @@
         function isArc(d) {
             return 'data' in d && hasTarget(c3.data.targets, d.data.id);
         }
-        function getGridFilter(params) {
-            params = params || {};
-            return function (line) {
-                return !(('value' in params && line.value === params.value) || ('class' in params && line.class === params.class));
-            };
+        function getGridFilterToRemove(params) {
+            return params ? function (line) {
+                var found = false;
+                [].concat(params).forEach(function (param) {
+                    if ((('value' in param && line.value === params.value) || ('class' in param && line.class === params.class))) {
+                        found = true;
+                    }
+                });
+                return found;
+            } : function () { return true; };
         }
         function removeGridLines(params, forX) {
-            var toShow = getGridFilter(params),
-                toRemove = function (line) { return !toShow(line); },
+            var toRemove = getGridFilterToRemove(params),
+                toShow = function (line) { return !toRemove(line); },
                 classLines = forX ? CLASS.xgridLines : CLASS.ygridLines,
                 classLine = forX ? CLASS.xgridLine : CLASS.ygridLine;
             main.select('.' + classLines).selectAll('.' + classLine).filter(toRemove)

htdocs/samples/grid_x_lines.html

@@ -44,6 +44,19 @@
       setTimeout(function () {
         chart.xgrids.remove({class:'hoge'});
       }, 5000);
+
+      setTimeout(function () {
+        chart.xgrids.remove([{value: 1}, {value: 4}]);
+      }, 6000);
+
+      setTimeout(function () {
+        chart.xgrids([{value: 1, text:'Label 1'}, {value: 4, text: 'Label 4'}]);
+      }, 7000);
+
+      setTimeout(function () {
+        chart.xgrids.remove();
+      }, 8000);
+
     </script>
   </body>
 </html>