currency_convert_page.js

(function(){
    "use strict";
    const USD_PER_EURO = 1.15; // used to be 1.123
    const USD_PER_NOK = 0.12;
    let recur=function(ele){
        if(ele.nodeName === "SCRIPT"){
            return;
        }
        if(ele.nodeName==="#text"){
            // euro->usd
            let text=ele.nodeValue;
            let rex = /(?<euro_text>(?<euro_amount>\d+(?:\.\d+)?)\s*\€)/;
            let exec = rex.exec(text);
            if(!exec){
                rex =  /(?<euro_text>\€\s*(?<euro_amount>\d+(?:\.\d+)?))/;
                exec = rex.exec(text);
            }
            if(exec){
                let euro_text = exec.groups.euro_text;
                let euro_amount = exec.groups.euro_amount;
                let USD = euro_amount * USD_PER_EURO;
                text = text.substring(0,exec.index) + USD.toFixed(2) + "$" + text.substring(exec.index + euro_text.length);
                ele.nodeValue = text;
                console.log(text);
            }
            // nok -> usd
            rex = /(?<nok_text>kr\s*(?<nok_amount>\d+(?:(?:\.|\,)\d+)?))/;
            exec = rex.exec(text);
            if(exec){
                let nok_text = exec.groups.nok_text;
                let nok_amount = exec.groups.nok_amount.replace(",",".");
                let USD = nok_amount * USD_PER_NOK;
                text = text.substring(0,exec.index) + USD.toFixed(2) + "$" + text.substring(exec.index + nok_text.length);
                ele.nodeValue = text;
                console.log(text);
            }

        }
        if(!ele.childNodes || !ele.childNodes.length){
            return;
        }
        for(let i=0;i<ele.childNodes.length;++i){
            recur(ele.childNodes[i]);
        }
    };
    recur(document);
})();