From 3c15d0ef0b98cfb4080ceabb7f5b1de8707182aa Mon Sep 17 00:00:00 2001
From: jaknapper <jaknapper@hotmail.com>
Date: Thu, 5 Jun 2025 11:50:43 +0100
Subject: [PATCH] Custom at() function in webapp for backwards compatibility

---
 .../labThingsComponents/actionButton.vue      | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/webapp/src/components/labThingsComponents/actionButton.vue b/webapp/src/components/labThingsComponents/actionButton.vue
index 7efbbbc9..4033f133 100644
--- a/webapp/src/components/labThingsComponents/actionButton.vue
+++ b/webapp/src/components/labThingsComponents/actionButton.vue
@@ -171,6 +171,25 @@ export default {
   },
 
   mounted() {
+    //Define .at() as a custom function, for backwards compatibility with Connect
+    function at(n) {
+      // ToInteger() abstract op
+      n = Math.trunc(n) || 0;
+      // Allow negative indexing from the end
+      if (n < 0) n += this.length;
+      // OOB access is guaranteed to return undefined
+      if (n < 0 || n >= this.length) return undefined;
+      // Otherwise, this is just normal property access
+      return this[n];
+    }
+  const TypedArray = Reflect.getPrototypeOf(Int8Array);
+  for (const C of [Array, String, TypedArray]) {
+      Object.defineProperty(C.prototype, "at",
+        { value: at,
+          writable: true,
+          enumerable: false,
+          configurable: true });
+    }
     // Check for already running tasks
     if (this.taskStarted != true) {
       this.checkExistingTasks();