javascript-halado-public/03-array/lessons/05-functional-programming-example.html at main · pryann/javascript-halado-public · GitHub

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<!DOCTYPE html>
<html lang="hu">

  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
  </head>

  <body>
    <ul id="price-list">
      <li>
        AOC C24G1 Monitor
      </li>
      <li data-company="AMD">
        SAPPHIRE Radeon RX 5700 XT 8GB GDDR6 256bit Videokártya
      </li>
      <li data-price="151.012,12">
        GIGABYTE GeForce RTX 2060 SUPER AORUS 8GB GDDR6 256bit Videokártya
      </li>
      <li data-price="123.243,55">
        LG 34UC79G-B Monitor
      </li>
      <li data-price="64.543,29">
        GIGABYTE GeForce GTX 1060 WINDFORCE OC 3GB GDDR5 192bit Videokártya
      </li>
      <li data-price="230.323,32">
        Acer Predator XB271HU Monitor
      </li>
      <li data-price="48.344,30">
        LG 25UM58-P Monitor
      </li>
    </ul>

    <script>
      'use strict';

      const sumOfMoitorsPrice = Array
        .from(document.querySelectorAll('#price-list li[data-price]'))
        .filter(item => item.textContent.includes('Monitor'))
        .map(item => parseFloat(item.dataset.price.replace('.', '').replace(',', '.')))
        .reduce((previousPrice, curentPrice) => previousPrice + curentPrice);

      console.log(sumOfMoitorsPrice);
    </script>
  </body>

</html>