If in button-card, templating, java script

Configuration
1

Hi!

This drives me crazy. I am trying to master button-card, templating, java script function by using [[[ ]]].

I want to change the background color on a button-card based on if sensor.latest_available_version == sensor.installed_version or not.

This code works fine:

  - type: "custom:button-card"
    entity: sensor.latest_available_version
    color_type: card
    show_name: true
    color: blue
    styles:
      card:
        - background-color: >
            [[[
              if (1 == 1)
                return "green";
              return "blue";
            ]]]

but when I add the real if comparison it stops working.

  - type: "custom:button-card"
    entity: sensor.latest_available_version
    color_type: card
    show_name: true
    color: blue
    styles:
      card:
        - background-color: >
            [[[
              if (states('sensor.latest_available_version') == states('sensor.latest_available_version'))
                return "green";
              return "blue";
            ]]]

I have tested if {{ (states(‘sensor.latest_available_version’) == states(‘sensor.latest_available_version’)) }} in templating and it returns True so I cannot understand what makes it fail. Incorrect use of quotes " and ’ or comparison on wrong data type?