If I downgrade from a site plan to a free plan, what will happen to my custom code?

I’m considering buying a site plan just to have custom code. If I downgrade back to a free plan, what will happen with the custom code? Will the features implemented with it still remain, or will the code go back to how it was pre-site plan?

There is a clarification from Webflow Staff on this thread:

I guess the custom code will still be there but won’t have any effect as long as you stay on the free plan. However, this is just my assumption. Never tried it myself. You may want to contact Webflow support directly for more information.