[Added] JavaScript ComfyUI helpers

js/node_change.js

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+// Copyright (c) 2025 Salvador E. Tropea
+// Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
+// License: GPLv3
+// Project: ComfyUI-AudioSeparation
+
+// This script adds an event named "set-audioseparation-node"
+// It can currently just modify a widget value for the current node
+
+import { app } from "/scripts/app.js";
+
+// Register a new extension
+app.registerExtension({
+    name: "SET.AudioSeparation.NodeAdjust",  // Unique name
+
+    // The setup function is executed when the extension is loaded
+    setup() {
+        // Add a listener for our custom event
+        app.api.addEventListener("set-audioseparation-node", (event) => {
+            // The data from Python is in event.detail
+            const { action, arg1, arg2 } = event.detail;
+
+            // Find the node that is currently being executed
+            const node = app.graph.getNodeById(app.runningNodeId);
+            if (!node) {
+                console.warn(`[SET.AudioSeparation] Could not find running node with ID: ${app.runningNodeId}`);
+                return;
+            }
+
+            // --- ACTION EXECUTED HERE ---
+            switch (action) {
+                case 'change_widget':
+                    // arg1 = widget name (e.g., "model")
+                    // arg2 = new value (e.g., "💾 My Awesome Model")
+
+                    const widget = node.widgets.find(w => w.name === arg1);
+                    if (widget) {
+                        // This is the key part for combo boxes (dropdowns)
+                        // If the new value isn't in the list of options, add it first.
+                        if (!widget.options.values.includes(arg2)) {
+                            widget.options.values.push(arg2);
+                        }
+
+                        // Set the widget value
+                        widget.setValue(arg2, node, app.canvas);
+                    } else {
+                        console.error(`[SET.AudioSeparation] Widget '${arg1}' not found on node ${node.id}`);
+                    }
+                    break;
+
+                // Other actions here in the future
+                // case 'disable_widget':
+                //     ...
+                //     break;
+            }
+        });
+    },
+});

js/toast_handler.js

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+// Copyright (c) 2025 Salvador E. Tropea
+// Copyright (c) 2025 Instituto Nacional de Tecnología Industrial
+// License: GPLv3
+// Project: ComfyUI-AudioSeparation
+
+// This script adds an event named "set-audioseparation-toast"
+// Used to notify the user in the GUI using the Toast API
+
+import { app } from "/scripts/app.js";
+
+// Register a new extension
+app.registerExtension({
+    name: "SET.AudioSeparation.ToastHandler",  // Unique name
+
+    // The setup function is executed when the extension is loaded
+    setup() {
+        // Add a listener for our custom event
+        app.api.addEventListener("set-audioseparation-toast", (event) => {
+            // The data from Python is in event.detail
+            const { message, summary, severity } = event.detail;
+
+            // Use the ComfyUI toast API to show the message
+            // app.ui.toast.addMessage is the modern way to do this
+            app.extensionManager.toast.add({
+                severity: severity,
+                summary: summary,
+                detail: message,
+                life: 6000
+            });
+        });
+    },
+});