mikeguru
diff --git a/‎src/plot_api/plot_api.js
Copy file name to clipboardExpand all lines: src/plot_api/plot_api.js
+1-1Lines changed: 1 addition & 1 deletion b/‎src/plot_api/plot_api.js
Copy file name to clipboardExpand all lines: src/plot_api/plot_api.js
+1-1Lines changed: 1 addition & 1 deletion
diff --git a/‎test/jasmine/tests/plot_api_test.js
Copy file name to clipboardExpand all lines: test/jasmine/tests/plot_api_test.js
+23Lines changed: 23 additions & 0 deletions b/‎test/jasmine/tests/plot_api_test.js
Copy file name to clipboardExpand all lines: test/jasmine/tests/plot_api_test.js
+23Lines changed: 23 additions & 0 deletions
@@ -2372,7 +2372,7 @@ function diffData(gd, oldFullData, newFullData, immutable) {
     if(oldFullData.length !== newFullData.length) {
         return {
             fullReplot: true,
-            clearCalc: true
+            calc: true
         };
     }
 
 
@@ -2610,6 +2610,29 @@ describe('Test plot api', function() {
             images.draw.calls.reset();
         }
 
+        it('can add / remove traces', function(done) {
+            var data1 = [{y: [1, 2, 3], mode: 'markers'}];
+            var data2 = [data1[0], {y: [2, 3, 1], mode: 'markers'}];
+            var layout = {};
+            Plotly.newPlot(gd, data1, layout)
+            .then(countPlots)
+            .then(function() {
+                expect(d3.selectAll('.point').size()).toBe(3);
+
+                return Plotly.react(gd, data2, layout);
+            })
+            .then(function() {
+                expect(d3.selectAll('.point').size()).toBe(6);
+
+                return Plotly.react(gd, data1, layout);
+            })
+            .then(function() {
+                expect(d3.selectAll('.point').size()).toBe(3);
+            })
+            .catch(failTest)
+            .then(done);
+        });
+
         it('should notice new data by ===, without layout.datarevision', function(done) {
             var data = [{y: [1, 2, 3], mode: 'markers'}];
             var layout = {};
Original file line number	Diff line number	Diff line change
`@@ -2372,7 +2372,7 @@ function diffData(gd, oldFullData, newFullData, immutable) {`
`2372`	`2372`	`if(oldFullData.length !== newFullData.length) {`
`2373`	`2373`	`return {`
`2374`	`2374`	`fullReplot: true,`
`2375`		`- clearCalc: true`
	`2375`	`+ calc: true`
`2376`	`2376`	`};`
`2377`	`2377`	`}`
`2378`	`2378`