How is multicurrency implemented correctly in IM?

Question

Online shopping

Site on Wordpress. How is multicurrency implemented in IM in the most optimal way?
Necessary:

1. User-friendliness (which is better: with page reload or not)?
   
2. At the same time, it is necessary to take into account the work with caching with 100% confidence in adequate work.
   

I thought to implement either on JS with cookies (but "jumping-recalculations" of prices are possible here)
On php through get requests, then what about the load?
Do you have any other options?

Answer 1

Hello!
Do you want to write it yourself or are ready-made plugins suitable?
https://wpml.org/documentation/related-projects/wo...
https://ru.wordpress.org/plugins/woo-multi-currency/

Answer 2

item 1. - what do you think?)))
Of course, do it in JS, change prices smoothly through fade - everything will look like chocolate.
here you need to clarify a couple of nuances:
1. Upload (into a session or localstorage, or even just into a js-array) initially the exchange rate, this is just one or two numbers.
2. By clicking on the currency change, a banal recalculation and replacement in the corresponding blocks, it will take 50ms on the client
. The Russian Federation is allowed only in one currency, then there is no need for troubles with a basket, etc.. I.e. the original price in rubles will be added to the order!
I doubt that you are talking about a mega store with 20 currencies that sells all over the world. so all three of the above points are the very thing !! ))