From 84ac47e6f26a09d67007f44c97afc2aba4fdff3d Mon Sep 17 00:00:00 2001
From: colinl <clanlaw@gmail.com>
Date: Sat, 23 May 2026 16:07:42 +0100
Subject: [PATCH] Pass merged ui_update.chartOptions to clients when updates
 received

---
 nodes/widgets/ui_chart.js           | 2 ++
 ui/src/widgets/ui-chart/UIChart.vue | 7 -------
 2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/nodes/widgets/ui_chart.js b/nodes/widgets/ui_chart.js
index 6930f5cf3..1e049be45 100644
--- a/nodes/widgets/ui_chart.js
+++ b/nodes/widgets/ui_chart.js
@@ -165,6 +165,8 @@ module.exports = function (RED) {
                         // Deep merge new options in with old
                         const mergedOptions = deepMerge(currentOptions, updates.chartOptions)
                         statestore.set(group.getBase(), node, msg, 'chartOptions', mergedOptions)
+                        // pass the full set to the clients so they don't need to do the merge
+                        msg.ui_update.chartOptions = mergedOptions
                     }
                 }
 
diff --git a/ui/src/widgets/ui-chart/UIChart.vue b/ui/src/widgets/ui-chart/UIChart.vue
index 71beec29e..b5b771499 100644
--- a/ui/src/widgets/ui-chart/UIChart.vue
+++ b/ui/src/widgets/ui-chart/UIChart.vue
@@ -34,7 +34,6 @@ export default {
             },
             chartUpdateDebounceTimeout: null,
             tooltipDataset: [],
-            dynamicChartOptions: [], // an array of chart options updates received this session
             resizeObserver: null
         }
     },
@@ -193,8 +192,6 @@ export default {
                 if (this.chart) {
                     this.chart.setOption(updates.chartOptions)
                 }
-                // add these options to the array of previous updates received this session
-                this.dynamicChartOptions.push(updates.chartOptions)
             }
         },
         generateChartOptions () {
@@ -433,10 +430,6 @@ export default {
                         if (chartOptions) {
                             this.chart.setOption(chartOptions)
                         }
-                        // then from this session
-                        this.dynamicChartOptions.forEach((options) => {
-                            this.chart.setOption(options)
-                        })
                     }
                 }
             }