Position of Bootstrap Dropdown Button Shifts

I tried following the guidelines provided at this link: https://getbootstrap.com/docs/4.1/components/dropdowns/ and inserted a dropdown button into my code:

<div class="dropdown">
    <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Example 1</button>
</div>

However, I encountered an issue where clicking on the button to display the dropdown-menu caused the button to change its position. This strange behavior occurred with both of the dropdown buttons I added.

Here is what it looks like when the buttons are not clicked on:

https://i.sstatic.net/JLVFg.png

And here are examples of how the button changes position once the dropdown is clicked on:

https://i.sstatic.net/BVgFv.png

https://i.sstatic.net/OXNah.png

If you want to see the code that is causing this issue, you can check it out here: https://codepen.io/danfuentes/pen/MWaYOgz

Is there a way for me to ensure that the button stays in place while the menu items appear below it?

Answer №1

To group your elements together, enclose them within a parent div element with the btn-grp class. Here's an example:

<div class="btn-group" role="group">
    <button id="btnGroupDrop1" type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
      Dropdown
    </button>
    <div class="dropdown-menu" aria-labelledby="btnGroupDrop1">
      <a class="dropdown-item" href="#">Dropdown link</a>
      <a class="dropdown-item" href="#">Dropdown link</a>
    </div>
  </div>

Answer №2

To understand the issue with the button element, you need to share the HTML structure surrounding it and the corresponding CSS styles.

Kindly update your question with this additional information so that we can provide a better solution than just analyzing the button tag alone.

Post reviewing the codepen snippet:

I noticed some misplacement of div tags. Here's how you can correct it:


<div class="btn-group">
  <div class="dropdown">
    <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Example 1</button>
    <div class="dropdown-menu" aria-labelledby="dropdownMenu2">
      <a class="dropdown-item" href="#">Dropdown Text</a>
      <a class="dropdown-item" href="#">Dropdown 2</a>
      <a class="dropdown-item" href="#">Dropdown 3</a>
      <a class="dropdown-item" href="#">Dropdown 4</a>
      <a class="dropdown-item" href="#">Dropdown 5</a>
    </div>
  </div>

  <div class="dropdown">
    <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Example 2</button>
    <div class="dropdown-menu" aria-labelledby="dropdownMenu2">
      <a class="dropdown-item" href="#">Dropdown 1</a>
      <a class="dropdown-item" href="#">Dropdown 2</a>
      <a class="dropdown-item" href="#">Dropdown 3</a>
      <a class="dropdown-item" href="#">Dropdown 4</a>
      <a class="dropdown-item" href="#">Dropdown 5</a>
    </div>
  </div>

  <button type="button" class="btn btn-primary" onclick="#">Regular Button 1</button>
  <button type="button" class="btn btn-primary" onclick="#">Regular Button 2</button>
</div>

The key fix is to enclose all buttons within a single "dropdown" div.

The "dropdown" class applies css position:relative for appropriate dropdown display without disrupting other page elements.

Update 2: I've revised the HTML above to address the latest issue encountered. Each dropdown must now be enclosed in a div with the "dropdown" class to support individual links. To maintain their positioning, all buttons are now wrapped in a "btn-group" div.

The "btn-group" class sets position to relative but may cause styling issues like removing spacing between buttons. To counter this, I've added the following CSS rule:


button {
  margin: 10px !important
}

This rule assigns a 10px margin to all buttons on the page.

If you need to override any bootstrap class styles, remember to use the !important property on those elements.

Here's the corrected codepen link:

https://codepen.io/pen/pojvprg

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