# SceneScript Event applyUserProperties

This event function will be called under two circumstances:

  • It will be called once initially when the wallpaper is loaded.
  • It will be called each time the user adjusts a user property setting.
export function applyUserProperties(changedUserProperties) {

The parameter changedUserProperties will contain the key names of the specific user properties that you created. You can access properties via changedUserProperties.keyname, where keyname is the key that was assigned to the property in the project settings. For example, if you have a color property, it would be accessible via changedUserProperties.color.


After the initial wallpaper load event, the parameters will only contain property changes. For this reason, it is crucial that you check which value is being sent with the current event. We recommend using the hasOwnProperty() function for this.

export function applyUserProperties(changedUserProperties) {
        if (changedUserProperties.hasOwnProperty('first_property')) {
            // Logic for changedUserProperties.first_property goes here
        if (changedUserProperties.hasOwnProperty('second_property')) {
            // Logic for changedUserProperties.second_property goes here
        if (changedUserProperties.hasOwnProperty('third_property')) {
            // Logic for changedUserProperties.third_property goes here
        // More properties go here

# Example Usage

In the following example, we use a checkbox property to conditionally turn off some code in our update() function.

In this example, we have assigned our script to a Color property. The checkbox user property with the key iscolorful will be used to turn off our code that cycles the color in rainbow colors. To try this example, create a checkbox property named "Is Colorful?" (the user property key will be auto-generated to iscolorful in that case) and bind a SceneScript to a Color property of an asset.

We created the applyUserProperties event function and to make sure that Wallpaper Engine has sent any changes for this property, we first check if our iscolorful user property is part of the event:

 if (changedUserProperties.hasOwnProperty('iscolorful'))

We then assign the current value of our user property to a local variable named isColorful. We then continuously check if isColorful is true in the update() function of our element and turn off our rainbow color code if the value is not true.

You can see the full example here:




'use strict';
import * as WEColor from 'WEColor';
let rainbowSpeed = 1;
let rainbowSaturation = 1;
let rainbowBrightness = 1;
let isColorful = false;
 * @param {Vec3} value
export function update(value) {
	if (isColorful) {
		value = WEColor.hsv2rgb({
			x: Date.now() / 2000 * rainbowSpeed % 1,
			y: rainbowSaturation,
			z: rainbowBrightness
	return value;
export function applyUserProperties(changedUserProperties) {
        // First make sure to check if applyUserProperties is sending your property. Unchanged properties are not sent along so do not forget to check for this!
        if (changedUserProperties.hasOwnProperty('iscolorful')) {
            // Assign the changed property to a local variable
            isColorful = changedUserProperties.iscolorful;