Feature Request: this.entity_attribute[attributeName] replacement

README.md

@@ -199,7 +199,7 @@ sort:
 
 ## Entity options
 
-In the `options:` option of the filters, the string `this.entity_id` will be replaced with the matched entity_id. Useful for service calls - see below.
+In the `options:` option of the filters, the string `this.entity_id` will be replaced with the matched entity_id. `this.entity_attribute[attribute]` will be replaced with the value of the `attribute` attribute of the matched entity. Useful for service calls - see below.
 
 ## Examples
 

src/main.ts

@@ -222,6 +222,9 @@ class AutoEntities extends LitElement {
                 JSON.stringify({ ...entity, ...filter.options }).replace(
                   /this.entity_id/g,
                   entity.entity
+                ).replace(
+                  /this.entity_attribute\[((?!\d)[\w$]+)\]/g,
+                  (_, attribute) => this.hass.states[entity.entity]?.attributes[attribute]
                 )
               )
             );