Raw Configuration Editor - "value template" issue

Configuration Frontend
4

I see, Dev tools cannot help to debug a JS code.
Need to learn JS basics…
Suggest to ask all button-card related questions in the main thread - there is a chance users may help you.

Try this:

type: vertical-stack
cards:
  - type: entities
    entities:
      - input_text.test_text
  - type: custom:button-card
    entity: sun.sun
    styles:
      card:
        - background: >-
            [[[
              var strState = states['input_text.test_text'].state;
              if(strState.includes('jpg'))
              {
                var strPath = '/local/images/test/' + strState;
                return 'url(' + strPath + ')';
              }
              else
                return 'var(--red-color)'
            ]]]

image