Check if chart is already connected

Author: Shadow-Devil

src/Chartjs/assets/dist/controller.js

@@ -20,6 +20,10 @@ class default_1 extends Controller {
         if (!(this.element instanceof HTMLCanvasElement)) {
             throw new Error('Invalid element');
         }
+        if(Chart.getChart(this.element)) {
+            // Chart is already connected
+            return;
+        }
         const payload = this.viewValue;
         if (Array.isArray(payload.options) && 0 === payload.options.length) {
             payload.options = {};