Fixes React errors+crash when system theme changes on loaded dashboard (#1123)

* Fixes crash on theme change

* Changelog

CHANGELOG.md

@@ -16,6 +16,7 @@ All notable changes to this project will be documented in this file.
 - Fix weekly report time range plausible/analytics#951
 - Make sure embedded dashboards can run when user has blocked third-party cookies plausible/analytics#971
 - Sites listing page will paginate if the user has a lot of sites plausible/analytics#994
+- Crash when changing theme on a loaded dashboard plausible/analytics#1123
 
 ### Removed
 - Removes AppSignal monitoring package

assets/js/dashboard/stats/countries.js

@@ -34,7 +34,7 @@ class Countries extends React.Component {
   componentDidUpdate(prevProps) {
     if (this.props.query !== prevProps.query) {
       this.setState({loading: true, countries: null})
-      this.fetchCountries().then(this.drawMap.bind(this))
+      this.fetchCountries().then(this.drawMap)
     }
 
     if (this.props.darkTheme !== prevProps.darkTheme) {
@@ -42,7 +42,7 @@ class Countries extends React.Component {
         document.getElementById('map-container').removeChild(document.querySelector('.datamaps-hoverover'));
         document.getElementById('map-container').removeChild(document.querySelector('.datamap'));
       }
-      this.drawMap();
+      this.fetchCountries().then(this.drawMap)
     }
   }
 

assets/js/dashboard/stats/visitor-graph.js

@@ -202,6 +202,7 @@ class LineGraph extends React.Component {
     }
 
     if (prevProps.darkTheme !== this.props.darkTheme) {
+      this.chart.destroy();
       this.chart = this.regenerateChart();
       this.chart.update();
     }