How to transfer prices from calculator to json file?

Question

JavaScript

How to transfer prices from calculator to json file? For convenience, you need to display prices from the js file to json, so that later in this json file you can change prices without resorting to edits in the js file

//price
    if (server === "na" || server === "oce" || server === "las" || server === "lan" || server === "br" || server === "jp") {
        if (current_tier_num === "0") {
            pricepergame = 2.9;
        }
        if (current_tier_num === "1") {
            pricepergame = 1.8;
        }
        if (current_tier_num === "2") {
            pricepergame = 1.8;
        }
        if (current_tier_num === "3") {
            pricepergame = 2.8;
        }
        if (current_tier_num === "4") {
            pricepergame = 3.6;
        }
        if (current_tier_num === "5") {
            pricepergame = 4.3;
        }
        if (current_tier_num === "6") {
            pricepergame = 6;
        }
        if (current_tier_num === "7") {
            pricepergame = 9;
        }
        if (current_tier_num === "8") {
            pricepergame = 10;
        }
        if (current_tier_num === "9") {
            pricepergame = 11;
        }
        
        currency = "РУБ";
        currency_s = "₽";
    } else {
       
        if (current_tier_num === "0") {
            pricepergame = 2;
        }
        if (current_tier_num === "1") {
            pricepergame = 1.5;
        }
        if (current_tier_num === "2") {
            pricepergame = 1.65;
        }
        if (current_tier_num === "3") {
            pricepergame = 2;
        }
        if (current_tier_num === "4") {
            pricepergame = 2.5;
        }
        if (current_tier_num === "5") {
            pricepergame = 3;
        }
        if (current_tier_num === "6") {
            pricepergame = 4.5;
        }
        if (current_tier_num === "7") {
            pricepergame = 7;
        }
        if (current_tier_num === "8") {
            pricepergame = 8;
        }
        if (current_tier_num === "9") {
            pricepergame = 9;
        }
        currency = "РУБ";
        currency_s = "₽";

    }
    //end price

Answer 1

on the client - no way, you need to send data to the back and write to the json file on the back through the fs module.