Renderer setState fix (#675)

* only call setstate after mounted

* version patch

packages/sanddance-explorer/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@msrvida/sanddance-explorer",
-  "version": "4.1.4",
+  "version": "4.1.5",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@msrvida/sanddance-explorer",
-      "version": "4.1.4",
+      "version": "4.1.5",
       "license": "MIT",
       "dependencies": {
         "d3-format": "^1.3.2"

packages/sanddance-explorer/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@msrvida/sanddance-explorer",
-  "version": "4.1.4",
+  "version": "4.1.5",
   "description": "SandDance data exploration React component.",
   "main": "dist/es6/index.js",
   "repository": {

packages/sanddance-explorer/src/controls/renderer.tsx

@@ -29,6 +29,7 @@ export interface State {
 function _Renderer(_props: Props) {
 
     class __Renderer extends base.react.Component<Props, State> {
+        private mounted: boolean;
 
         constructor(props: Props) {
             super(props);
@@ -36,13 +37,21 @@ function _Renderer(_props: Props) {
             if (!this.state.viewer?.presenter?.morphchartsref) {
                 const t = setInterval(() => {
                     const newState = this.getInitialState(props);
-                    if (newState.viewer?.presenter?.morphchartsref) {
+                    if (this.mounted && newState.viewer?.presenter?.morphchartsref) {
                         clearInterval(t);
                         this.setState(newState);
                     }
                 }, 10);
             }
         }
+        
+        componentDidMount() {
+            this.mounted = true;
+        }
+
+        componentWillUnmount() {
+            this.mounted = false;
+        }
 
         getInitialState(props: Props): State {
             const { viewer } = props.explorer;