https://case-battle.one/ case average price

case_battle.js

let priceArray = []
var casePrice = 0

let items = document.getElementsByClassName("unit");
for (var i=0; i<items.length; i++){
    let item = items[i];
    let price = item.getElementsByClassName("price")[0].children[0].innerText.slice(2).replace(" ","");
    priceArray.push(parseInt(price));
}
console.warn("All items prices: ", priceArray.sort(function(a, b) {return a - b;}))

const average = (array) => array.reduce((a, b) => a + b) / array.length;
console.error("Average item price is: ", average(priceArray));


if (document.getElementById("btns-before-open-holder")){
    let casePriceTxt = document.getElementById("btns-before-open-holder").children[0].innerText;
    casePrice = parseInt(casePriceTxt.slice(11,-4));
} else {
    casePrice = parseInt(document.getElementById("info-block-holder").getElementsByTagName("span")[0].innerText)
}
console.info("Case open price is: ", casePrice);

var lowPricePrizes = priceArray.filter(function isBigEnough(value) {
    return value < casePrice;
});

var doublePricePrizes = priceArray.filter(function isBigEnough(value) {
    return (value >= casePrice*2);
});
console.info("All prizes count: ", priceArray.length );
console.info("Prizes with lower price then case: ", lowPricePrizes.length );
console.info("Prizes with more then double case price: ", doublePricePrizes.length );
console.warn("Chance to lose money: " + (lowPricePrizes.length/priceArray.length)*100 + "%")
console.warn("Chance to double money: " + (doublePricePrizes.length/priceArray.length)*100 + "%")