Fix problem with stacked-100

src/api.flow.js

@@ -83,7 +83,8 @@ c3_chart_fn.flow = function (args) {
             t.values = missing.concat(t.values);
         });
     }
-    $$.data.targets = $$.data.targets.concat(targets); // add remained
+    $$.data._targets = $$.data.targets.concat(targets); // add remained
+    $$.data.targets = $$.normalize($$.data._targets);
 
     // check data count because behavior needs to change when it's only one
     dataCount = $$.getMaxDataCount();

src/axis.js

-c3_chart_internal_fn.initAxis = function () {
+c3_chart_internal_fn.initAxis = function(){
     var $$ = this, config = $$.config, main = $$.main;
     $$.axes.x = main.append("g")
         .attr("class", CLASS.axis + ' ' + CLASS.axisX)

src/core.js

@@ -164,12 +164,14 @@ c3_chart_internal_fn.initWithData = function (data) {
 
     // Init data as targets
     $$.data.xs = {};
-    $$.data.targets = $$.convertDataToTargets(data);
+    $$.data._targets = $$.convertDataToTargets(data);
 
     if (config.data_filter) {
-        $$.data.targets = $$.data.targets.filter(config.data_filter);
+        $$.data._targets = $$.data._targets.filter(config.data_filter);
     }
 
+    $$.data.targets = $$.normalize($$.data._targets);
+
     // Set targets to hide if needed
     if (config.data_hide) {
         $$.addHiddenTargetIds(config.data_hide === true ? $$.mapToIds($$.data.targets) : config.data_hide);
@@ -394,10 +396,9 @@ c3_chart_internal_fn.updateSizes = function () {
     }
 };
 
-c3_chart_internal_fn.updateTargets = function (t){
+c3_chart_internal_fn.updateTargets = function (targets){
     var $$ = this;
 
-    var targets = $$.normalize(t);
     /*-- Main --*/
 
     //-- Text --//

src/data.load.js

@@ -21,13 +21,13 @@ c3_chart_internal_fn.load = function (targets, args) {
                 }
             }
         });
-        $$.data.targets = $$.data.targets.concat(targets); // add remained
+        $$.data._targets = $$.data._targets.concat(targets); // add remained
+        $$.data.targets = $$.normalize($$.data._targets);
     }
 
     // Set targets
     $$.updateTargets($$.data.targets);
 
-
     $$.tuneAxis();
     // Redraw with new targets
     $$.redraw({withUpdateOrgXDomain: true, withUpdateXDomain: true, withLegend: true});
@@ -82,8 +82,9 @@ c3_chart_internal_fn.unload = function (targetIds, done) {
             $$.legend.selectAll('.' + CLASS.legendItem + $$.getTargetSelectorSuffix(id)).remove();
         }
         // Remove target
-        $$.data.targets = $$.data.targets.filter(function (t) {
+        $$.data._targets = $$.data.targets.filter(function (t) {
             return t.id !== id;
         });
+        $$.data.targets = $$.normalize($$.data._targets);
     });
 };

src/stacked.js

@@ -5,7 +5,11 @@ c3.chart.internal.fn.normalize = function(targets){
         return targets;
     }
 
-    var data = copyArray(targets);
+    var data = [];
+
+    targets.forEach(function(target){
+        data.push($$.cloneTarget(target));
+    });
 
     for(var k = 0; k < targets[0].values.length; k++) {
         var tt = 0;
@@ -17,7 +21,11 @@ c3.chart.internal.fn.normalize = function(targets){
 
     for(c in targets) {
         for(k = 0; k < tr.length; k++) {
-            data[c].values[k].value = targets[c].values[k].value / tr[k];
+            if(tr[k] == 0){
+                data[c].values[k].value = 0;
+            } else {
+                data[c].values[k].value = targets[c].values[k].value / tr[k];
+            }
         }
     }
 

src/type.js

@@ -32,7 +32,8 @@ c3_chart_internal_fn.hasArcType = function (targets) {
 };
 c3_chart_internal_fn.isLineType = function (d) {
     var config = this.config, id = isString(d) ? d : d.id;
-    return !config.data_types[id] || ['line', 'spline', 'area', 'area-spline', 'step', 'area-step'].indexOf(config.data_types[id]) >= 0;
+    var is = !config.data_types[id] || ['line', 'spline', 'area', 'area-spline', 'step', 'area-step'].indexOf(config.data_types[id]) >= 0;
+    return is;
 };
 c3_chart_internal_fn.isStepType = function (d) {
     var id = isString(d) ? d : d.id;

src/util.js

@@ -63,10 +63,10 @@ var isValue = c3_chart_internal_fn.isValue = function (v) {
         var newObj = {};
         for(var key in oldObj){
             if(oldObj.hasOwnProperty(key)){
-                if(typeof oldObj[key] === 'object'){
-                    newObj[key] = copyObject(oldObj[key]);
-                } else if(Array.isArray(oldObj[key])){
+                if(Array.isArray(oldObj[key])){
                     newObj[key] = copyArray(oldObj[key]);
+                } else if(typeof oldObj[key] === 'object'){
+                    newObj[key] = copyObject(oldObj[key]);
                 } else if(typeof oldObj[key] === 'function'){
                     newObj[key] = oldObj[key].bind(newObj);
                 } else {