Troubleshooting CSS navigation bar hamburger dilemma

Currently, I am facing an issue with a toggle button on my website. When I click on the hamburger menu, the navigation bar does not show up even though the toggle feature is working perfectly fine. I have tried combining different sources to solve this problem since the underlying concept remains the same.

References:

https://www.example.com/toggle-button-video1

https://www.example.com/toggle-button-video2

* {
          margin: 0;
          padding: 0;
        }

        #toggle {
          display: none;
        }

        .hambuger {
          z-index: 1;
          position: fixed;
          width: 25px;
          top: 20px;
          left: 28px;
          cursor: pointer;
        }

        .line {
          display: block;
          width: 100%;
          height: 3px;
          margin-bottom: 3px;
          background-color: black;
        }

        .menu {
          display: none;
          width: 70px;
          line-height: 1.7em;
          margin: 40px;
        }

        .menu a {
          display: block;
          text-decoration: none;
          color: black;
          border: 1px grey solid;
        }

        #toggle:checked~.menu {
          display: block;
        }
<header class="content">
          <label for="toggle" class="hambuger">
            <input type="checkbox" id="toggle">
            <span class="line"></span>
            <span class="line"></span>
            <span class="line"></span>
          </label>

          <nav class="menu">
            <a href="#" class="active">Home</a>
            <a href="#" class="active">About us</a>
            <a href="#" class="active">History</a>
            <a href="#" class="active">Contacts</a>
          </nav>
        </header>

htmlcsshamburger-menu

Answer №1

To use the general sibling selector ~ to choose your .menu item from the input, I made the decision to relocate the input so that it becomes a sibling with the menu within the same parent (the header element).

* {
  margin: 0;
  padding: 0;
}

#toggle {
  display: none;
}

.hambuger {
  z-index: 1;
  /*keeps displaying the icon when it clicks*/
  position: fixed;
  width: 25px;
  /*The parents (hamburger) of siblings (span)*/
  top: 20px;
  left: 28px;
  cursor: pointer;
  /*to able to click it*/
}

.line {
  display: block;
  /*to show the three lines*/
  width: 100%;
  /*Maximize the width of the parents (hamburger: 25px width)*/
  height: 3px;
  margin-bottom: 3px;
  /*to separate and see the icons*/
  background-color: black;
  /*color of the icons*/
}

.menu {
  display: none;
  width: 70px;
  line-height: 1.7em;
  margin: 40px;
}

.menu a {
  display: block;
  text-decoration: none;
  color: black;
  border: 1px grey solid;
}

#toggle:checked~.menu {
  display: block;
  /*The toggle became the parents while menu is the sibling here*/
}
<header class="content">
  <input type="checkbox" id="toggle">
  <label for="toggle" class="hambuger">
    <span class="line"></span>
    <span class="line"></span>
    <span class="line"></span>
  </label>
  <nav class="menu">
    <a href="#" class="active">Home</a>
    <a href="#" class="active">About us</a>
    <a href="#" class="active">History</a>
    <a href="#" class="active">Contacts</a>
  </nav>

</header>

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