Collapse and expand elements with CSS

Question

I'm trying to build a page where only headlines are visible when it is loaded, and the tables beneath each title toggle between hidden and displayed state when the user clicks on the title. The constraint I have is to do this in CSS only.

This is what I came up with so far:

https://jsfiddle.net/Argoron/c1ypx24c/6/

It doesn't work the way it should because every time I click on a title, the tables beneath the other titles are hidden. What I'm trying to accomplish is that each section behaves independently, meaning that for example table 1 should change its display state only when title 1 is being clicked.

Also, not sure why both alternative titles are displayed in section 3.

Answer 1

I will suggest use checkbox input and :checked instead of a and :target tags to trigger the event since the target will change always you click another link. Try this:

.tb {
    margin:10px 0;
}
.tb span+span, .collapsible {
    display:none;
}
.tb input[type="checkbox"]:checked ~ span {
    display:none;
}
.tb input[type="checkbox"]:checked ~ span+span{
    display:inline;
}
.tb input[type="checkbox"]:checked ~ .collapsible {
    display:table;
}

<div class="tb">
    <input type="checkbox"/>
    <span>Show</span><span>Hide</span>
    <table class="collapsible" id="collapsible1">
        <tr>
            <td>Hello 1</td>
        </tr>   
    </table>    
</div>
<div class="tb">
    <input type="checkbox"/>
    <span>Show</span><span>Hide</span>
    <table class="collapsible" id="collapsible1">
        <tr>
            <td>Hello 2</td>
        </tr>   
    </table>    
</div>
<div class="tb">
    <input type="checkbox"/>
    <span>Show</span><span>Hide</span>
    <table class="collapsible" id="collapsible1">
        <tr>
            <td>Hello 3</td>
        </tr>   
    </table>    
</div>

---

Now if you don't want to see the checkbox you can use CSS. Check this Snippet

.tb {
  margin: 10px 0;
  position: relative;
}
input[type="checkbox"] {
  width: 100%;
  height: 23px;
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  z-index: 10;
  cursor: pointer;
}
input[type="checkbox"]:hover ~ span {
  background: black;
}
.tb span {
  position: relative;
  height: 23px;
  line-height: 23px;
  display: inline-block;
  background: red;
  color: white;
  transition: all .3s ease;
  padding: 0 10px;
  width: 100%;
}
.tb span+span,
.collapsible {
  display: none;
}
.tb input[type="checkbox"]:checked ~ span {
  display: none;
}
.tb input[type="checkbox"]:checked ~ span+span {
  display: inline-block;
}
.tb input[type="checkbox"]:checked ~ .collapsible {
  display: table;
}

<div class="tb">
  <input type="checkbox" />
  <span>Show</span><span>Hide</span>
  <table class="collapsible" id="collapsible1">
    <tr>
      <td>Hello 1</td>
    </tr>
  </table>
</div>
<div class="tb">
  <input type="checkbox" />
  <span>Show</span><span>Hide</span>
  <table class="collapsible" id="collapsible1">
    <tr>
      <td>Hello 2</td>
    </tr>
  </table>
</div>
<div class="tb">
  <input type="checkbox" />
  <span>Show</span><span>Hide</span>
  <table class="collapsible" id="collapsible1">
    <tr>
      <td>Hello 3</td>
    </tr>
  </table>
</div>

Or the DemoFiddle