Change the background by clicking on the button

I need to change the background color at the same time as changing the image by clicking on the button. Darkening the background works completely, but how do I change the background by clicking on the button? I was looking for it, but it didn't work out, please help me.

document.getElementById('hide-checkbox').addEventListener('click', function() {
  const currentTheme = document.body.className;
  if (currentTheme === 'light-theme') {
    document.body.className = 'dark-theme';
    localStorage.setItem('theme', 'css/Style.css');
  } else {
    document.body.className = 'light-theme';
    localStorage.setItem('theme', 'css/Style.css');
  }
});

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-image: url("https://sun9-66.userapi.com/impg/U_B0e4HYLxsYNJIxFpYW6jR12JhDy76x2zhkXw/O4OafXIrfLc.jpg?size=2560x1920&quality=95&sign=c9143650a2af6853e49e25e18475c8f4&type=album");
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

<div class="image">
  <input type="checkbox" id="hide-checkbox">
  <label for="hide-checkbox" class="toggle">
    <span class="toggle-button">
      <span class="crater crater-1"></span>
      <span class="crater crater-2"></span>
      <span class="crater crater-3"></span>
      <span class="crater crater-4"></span>
      <span class="crater crater-5"></span>
      <span class="crater crater-6"></span>
      <span class="crater crater-7"></span>
    </span>
    <span class="star star-1"></span>
    <span class="star star-2"></span>
    <span class="star star-3"></span>
    <span class="star star-4"></span>
    <span class="star star-5"></span>
    <span class="star star-6"></span>
    <span class="star star-7"></span>
    <span class="star star-8"></span>
  </label>
</div>

Solution

Here is the full code. You need to write CSS for changing colors. Change background urls and try...

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

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    body {
      margin: 0;
      font-family: Arial, sans-serif;
      /* background-image: url("https://sun9-66.userapi.com/impg/U_B0e4HYLxsYNJIxFpYW6jR12JhDy76x2zhkXw/O4OafXIrfLc.jpg?size=2560x1920&quality=95&sign=c9143650a2af6853e49e25e18475c8f4&type=album"); */
      /* background-position: center center;
      background-repeat: no-repeat;
      background-attachment: fixed;
      background-size: cover; */
    }

    body.dark-theme {
      background-color: #131313;
      color: #dfdfdf;
    }

    body.light-theme {
      background-color: #dfdfdf;
      color: #131313;
    }

  </style>
</head>

<body class="light-theme">
  <div class="image">
    <input type="checkbox" id="hide-checkbox">
    <h1>Theme Demo</h1>
    <label for="hide-checkbox" class="toggle">
      <span class="toggle-button">
        <span class="crater crater-1"></span>
        <span class="crater crater-2"></span>
        <span class="crater crater-3"></span>
        <span class="crater crater-4"></span>
        <span class="crater crater-5"></span>
        <span class="crater crater-6"></span>
        <span class="crater crater-7"></span>
      </span>
      <span class="star star-1"></span>
      <span class="star star-2"></span>
      <span class="star star-3"></span>
      <span class="star star-4"></span>
      <span class="star star-5"></span>
      <span class="star star-6"></span>
      <span class="star star-7"></span>
      <span class="star star-8"></span>
    </label>

    <script>
      document.addEventListener("DOMContentLoaded", () => {
        const themeBtn = document.querySelector('#hide-checkbox');
        themeBtn.addEventListener('change', (e) => {
          if (e.currentTarget.checked) {
            document.body.classList.add("dark-theme");
            document.body.classList.remove("light-theme");
            // document.body.style.backgroundImage = 'url(someurl)';
          } else {
            // document.body.style.backgroundImage = 'url(anotherurl)';
            document.body.classList.add("light-theme");
            document.body.classList.remove("dark-theme");
          }
        });
      });
    </script>
</body>

</html>