Custom CSS on a Post Purchase extension

Retired Boards Appdev Extensions
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Topic summary

  • Issue: A developer asked how to apply custom CSS to the Text component in a Post-purchase extension.

  • Answer: It isn’t possible. The CSS for Post-purchase extension components—like Checkout UI components—cannot be altered or overridden, per Shopify’s documentation (link provided).

  • Status: Resolved; no workaround or alternative approach was provided.

Summarized with AI on January 18. AI used: gpt-5.
1

I’m working on a Post Purchase extension and I wanted to add a custom CSS to the Text component but I’ve tried all ways but without any success, any idea on how I can achieve that ?

2

Hi there :waving_hand:
The CSS of Post-purchase extension components, like Checkout UI components cannot be overridden.