Angular Bootstrap dropdown menu opens on the left side for items

When using ngbDropdown, the default alignment of drop down items is on the right side. However, if the drop down alignment is too far to the right, the item may become invisible.

Below is the HTML code:

<div ngbDropdown class="d-inline-block float_right">
   <span id="dropdownBasic1" ngbDropdownToggle class="cursor-pointer">Sort by</span>
   <div ngbDropdownMenu aria-labelledby="dropdownBasic1">
      <button class="dropdown-item">Name</button>
      <button class="dropdown-item">Date of creation</button>
   </div>
</div>

I attempted to use the class dropdown-menu-left to align the drop down items to the left, but it was unsuccessful. How can I properly align the drop down items to ensure they display on the left side without breaking the text?

Answer №1

I managed to solve the issue by adding placement="bottom-right" to the main div. Here is the updated HTML:

<div ngbDropdown class="d-inline-block float_right" placement="bottom-right">
   <span id="dropdownBasic1" ngbDropdownToggle class="cursor-pointer">Sort by</span>
   <div ngbDropdownMenu aria-labelledby="dropdownBasic1">
      <button class="dropdown-item">Name</button>
      <button class="dropdown-item">Date of creation</button>
   </div>
</div>

Answer №2

In addition to the officially approved answer, if you're using Angular 8:

Make sure to add the placement="bottom-right" attribute to a tag that is nested within a tag with the navbar class, along with including display="dynamic".

By default, child elements of tags with the navbar class have a display="static" property. I found that Sony-Khan's solution didn't work until I added this override. The Ng-bootstrap documentation explains:

If a dropdown is used within Bootstrap's navbar, it won't be positioned (to align with Bootstrap's behavior and function properly on mobile). You can specify the display input to change this.

To make this adjustment, update the opening tag in the sample code provided to:

<div
  ngbDropdown
  class="d-inline-block float_right"
  placement="bottom-right"
  display="dynamic"
  >
  ...
</div>

I am a bit apprehensive about the part of the documentation mentioning that static is the default for compatibility with Bootstrap and optimal performance on mobile devices. Since I can't test this on mobile currently, I would appreciate more information on the potential side effects of implementing this override.

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