Web Messaging SDK config ignoring launcher position and color overrides

NICE CXone API & Integrations
1

The genesyscloud-messaging-ui SDK is completely ignoring the launcher configuration object. I’ve passed the exact JSON structure from the docs, but the widget stays in the bottom right with default blue.

  • SDK version: 2.3.1
  • Config passed to GenesysCloudMessagingUI.init():
{
"launcher": {
"position": "bottom-left",
"iconColor": "#FF0000"
}
}
  • Browser console shows no errors during init.

Is there a specific CSS class I need to override or is the SDK hard-coding these values? Need this fixed before the sprint review.

2

You’re likely hitting a caching issue or missing the customStyles wrapper. The SDK doesn’t always pick up top-level launcher overrides directly in init() unless you’re using the newer configuration schema.

Try wrapping your style overrides in customStyles instead. Here’s how I usually structure it in my deployment scripts to ensure it sticks:

GenesysCloudMessagingUI.init({
 orgId: "your-org-id",
 customStyles: {
 launcher: {
 position: "bottom-left",
 iconColor: "#FF0000"
 }
 }
});

Also, clear your browser cache or do a hard refresh. The widget assets are heavily cached, so sometimes you’ll see the old config even after changing the code. If you’re injecting this via Terraform or a script, make sure the HTML element is fully loaded before calling init(). I’ve seen race conditions where the SDK initializes before the DOM is ready, causing it to ignore dynamic configs.

Check the network tab for the config fetch too. If you see a 200 OK but the UI doesn’t change, it’s almost certainly a CSS override issue or cache.

3

That customStyles wrapper suggestion is risky if you’re on 2.3.1. The property name changed in a minor patch that same month. You’ll likely get a silent fail where the SDK logs a warning but renders nothing.

Check your browser console for GenesysCloudMessagingUI: Configuration validation failed. If you see it, drop customStyles and use the explicit launcher object at the root level, but ensure you’re passing position as a string enum and not a CSS value.

GenesysCloudMessagingUI.init({
 launcher: {
 position: "bottom-left", // Must be exact string match
 iconColor: "#FF0000",
 enabled: true // Explicitly enable it if overrides are ignored
 }
});

If that still doesn’t stick, clear your browser cache or hard reload. The SDK caches the config in localStorage under genesys-cloud-messaging-config. Old configs from previous deploys often overwrite new init calls if the version string doesn’t force a refresh.

4

The customStyles wrapper is definitely the culprit here, especially on 2.3.1. The SDK validation logic is strict about schema versioning.

You don’t need a wrapper. Just pass the launcher object directly to init(). The key is ensuring the property names match the exact casing expected by that specific minor version. iconColor might be ignored if the SDK expects backgroundColor or similar legacy keys.

Try this structure:

GenesysCloudMessagingUI.init({
 organizationId: 'your-org-id',
 launcher: {
 position: 'bottom-left',
 backgroundColor: '#FF0000' // Try backgroundColor instead of iconColor
 }
});

Check the browser console for GenesysCloudMessagingUI: Configuration validation failed. If that warning appears, the SDK is rejecting your config silently. I’ve seen this happen when the config object has extra keys that aren’t in the allow-list for that version.

Also, clear your local storage. The widget caches the last successful config. Even if you fix the code, it might still render the old cached version until you clear it.

This usually fixes the rendering issue. If the position still sticks to bottom-right, check if any global CSS in your app is overriding the widget’s container styles.