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System which auto update prices on the order page


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First, I have prestashop


I've seen on differents websites using prestashop that when they increase the number of products they want while they are on the order page, the values in the table like "Taxes" or "Total prices" are updated instantly, while on my website I need to reload the page to update those values.


So I would like to ask you guys who know a bit better the prestashop system than me, what is used to update those values automatically ? I would like to know where I fucked up in short because this is really important to appear serious.


Best regards.





My browser's console tell me "priceDisplayPrecision is not defined" in Tools.js file everytime I try to update the quantity for an article, anybody knows where this var is supposed to be assigned ?

Edited by Alexenn (see edit history)
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