How to do a PUT request from a button?

[1MuhammadYahya]

I am fairly confused on how to convert an endpoint PUT function to use actions such that it can be called from a button.
My usecase consisted of setting a cookie for preserving dark-theme so that the initial SSR renders the page in the preferred theme. Previously I would just use
export const PUT: RequestHandler = async ( {request} ) => { // Validate Request return { headers: { 'Set-Cookie': 'theme=${theme}; SameSite=Strict; Secure; HttpOnly;' } } }
Inside +page.server.ts

However ever since the intorduction of Actons, I have no idea on how to convert this piece of code to the newer format. Am i missing something? Any help would be appreciated.
Thanks!

[NormandoHall]

Form Actions are always POST. If you need a PUT endpoint, you can do it as https://kit.svelte.dev/docs/routing#server with server.ts