Resolved "Cannot read property 'simulation' of undefined"

TheRobBrennan · TheRobBrennan · commit 68befd55918d · 2019-08-28T15:58:01.000-07:00
diff --git a/client/components/provenance/provenance-graph/provenance-graph.component.ts b/client/components/provenance/provenance-graph/provenance-graph.component.ts
@@ -42,7 +42,9 @@ export class ProvenanceGraphComponent implements AfterViewInit, OnChanges {
 
     ngOnChanges(changes: SimpleChanges) {
         this.initGraph();
-        this.graph.simulation.tick(100);
+        if (this.graph) {
+            this.graph.simulation.tick(100);
+        }
     }
 
     initGraph() {

Original file line number	Diff line number	Diff line change
`@@ -42,7 +42,9 @@ export class ProvenanceGraphComponent implements AfterViewInit, OnChanges {`
`42`	`42`
`43`	`43`	`ngOnChanges(changes: SimpleChanges) {`
`44`	`44`	`this.initGraph();`
`45`		`- this.graph.simulation.tick(100);`
	`45`	`+ if (this.graph) {`
	`46`	`+ this.graph.simulation.tick(100);`
	`47`	`+ }`
`46`	`48`	`}`
`47`	`49`
`48`	`50`	`initGraph() {`