Java-script-course/10-dom-projects.html at main · Dev-Soft-tech/Java-script-course · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <title>Dom project</title>
    <style>
      body {
        font-family: Arial, Helvetica, sans-serif;
      }
      .subscribe-button {
        border: none;
        background-color: black;
        color: white;
        padding-top: 10px;
        padding-bottom: 10px;
        padding-left: 15px;
        padding-right: 15px;
        font-weight: bold;
        border-radius: 50px;
        cursor: pointer;
        margin-bottom: 30px;
      }
      .is-subscribed{
        background-color: rgb(240, 240, 240);
        color: black;
      }
      .cost-input {
        font-size: 15px;
        padding: 10px;
      }
      .calculate-button {
        background-color: green;
        color: white;
        border: none;
        font-size: 15px;
        padding: 12px 15px;
        cursor: pointer;
      }
    </style>
  </head>
  <body>
    <p>Youtube subscribe button</p>
    <button onclick="subscribe()" class="js-subscribe-button subscribe-button">Subscribe</button>
    <p>Amazon Shipping Calculator</p>
    <input placeholder="cost of order" class="js-cost-input cost-input" onkeydown="
      handleCostKeydown(event)">
    <button onclick="CalculateTotal();" class="calculate-button">Calculate</button>
    <p class="js-total-cost"></p>
    <script>
      function handleCostKeydown(event) {
        if (event.key === 'Enter') {
          CalculateTotal();
        }
      }
      function CalculateTotal() {
        const inputElement = document.querySelector('.js-cost-input');
        let cost = Number(inputElement.value);
        if (cost < 40) {
          cost = cost + 10;
        }
        document.querySelector('.js-total-cost')
          .innerHTML = `$${cost}`;
      }
      function subscribe() {
        const buttonElement = document.querySelector('.js-subscribe-button');
        if (buttonElement.innerText === 'Subscribe') {
          buttonElement.innerHTML = 'Subscribed';
          buttonElement.classList.add('is-subscribed')
        } else {
          buttonElement.innerHTML = 'Subscribe';
          buttonElement.classList.remove('is-subscribed');
        }
      }
    </script>
  </body>
</html>