Sets the value of the specified widget property.
For widgets built with a self-hosted custom element, properties are bound to the element's attributes. Updating a widget property triggers the custom element's attributeChangedCallback() function.
| Name | Type | Description |
|---|---|---|
propName | string | Name of the property that you want to set. |
value | string | Value of the property that you want to set. |
Promise<void>