Hover over one element to make a different element visible

Question

I have been told that this isn't possible via CSS alone and so have turned to javascript.

Using onmouseover but I cannot get the hidden element to appear. I want it so that when hovering over element with ID #a, element with class .excerpt-box appears and then disappears when the mouse is moved away.

Does anyone know where I am going wrong? Thanks

Here's the code I've written so far:

The CSS includes visibility hidden for .excerpt-box.

          <div class="ind-circle" id="a" onmouseover="showExcerpt()">
            <p class="circle-title"> <a href="#">Read more</a></p>
          </div>
          
          <div class="excerpt-box" id="b">
          <h1 class="excerpts-title">This is an example excerpt title...</h1>
          <img class="excerpts-fi" src="<?php echo BASE_URL . '/assets/images/water.jpg'; ?>" alt="">
          <p class="excerpts-text">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>

        </div>

function showExcerpt() {
  document.getElementByClass('excerpt-box').style.visibility = 'visible';
}

Answer 1

First, the function you are looking for is document.getElementsByClassName. After this you have to select a particular element by index. See this link.

Better would be this solution: Grab the id of the div (id='b') and set display to block. As you can see, the div is display:none; at startup.

function showExcerpt() {
  document.getElementById('b').style.display = 'block';
}

.excerpt-box {
  display: none;
}

<div class="ind-circle" id="a" onmouseover="showExcerpt()">
  <p class="circle-title"> <a href="#">Read more</a></p>
</div>

<div class="excerpt-box" id="b">
  <h1 class="excerpts-title">This is an example excerpt title...</h1>
  <img class="excerpts-fi" src="<?php echo BASE_URL . '/assets/images/water.jpg'; ?>" alt="">
  <p class="excerpts-text">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure
    dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>

</div>