How to Remove the Arrow in Dropdown in Bootstrap 4?

With css, you could just do that:

.dropdown-toggle::after {
    display:none;
}

I don't recommend any of the existing answers because:

• .dropdown-toggle has more styling than just the caret. Removing the class from the element causes styling issues.

• Overriding .dropdown-toggle doesn't make sense. Just because you don't need a caret on some particular element, doesn't mean you won't need one later.

• ::after doesn't cover dropdown variants (some use ::before).

Use a custom .caret-off in the same element as your .dropdown-toggle element:

.caret-off::before {
    display: none;
}
.caret-off::after {
    display: none;
}

Some have said they needed to add !important but YMMV.

remove the dropdown-toggle class

If you are interested in replacing the arrow with another Icon (such as, FontAwesome) you would just need to remove the border on the pseudo element of .dropdown-toggle

.dropdown-toggle::after { border: none; }

I was using the accepted answer for quite a while in my project but just now stumbled across a variable used by bootstrap:

$enable-caret: true !default;

If you set this to false then the caret will be removed without having to do any custom code.

My project was Ruby/Rails so I was using the bootstrap-rubygem. I changed the variable by importing a custom-variables.scss with the above variable set to false in my application.scss BEFORE the bootstrap.scss file/files.

If you remove fit the dropdown-toggle class as below, all the dropdown buttons on your system will no longer have the caret.

.dropdown-toggle::after {
    display:none;
}

But maybe that's not what you want, so to remove just the specific button, we're going to insert a class called: remoecaret, and we'll fit the class: dropdown-toggle as follows:

.removecaret.dropdown-toggle::after {
    display: none;
}

and our html looks something like:

<div class="btn-group">
  <button class="btn btn-outline-secondary btn-sm dropdown-toggle removecaret" data-toggle="dropdown">
    <i class="fa fa-bars" aria-hidden="true"></i>
  </button>
  <ul class="dropdown-menu dropdown-menu-right">
    <li><a href="#"><a href="#"><i class="fa fa-cog" aria-hidden="true"></i>&nbsp;Edit</a></li>
  </ul>
</div>

.dropdown-toggle::after { 
 content: none; 
 }

You can also try this

Boostrap generates this using the CSS border:

.dropdown-toggle:after {
  border: none;
}

If you wanna exactly only in this bootstrap button class, make:

.btn .dropdown-toggle::after {
    display:none;
}

have you tried tag="a" within the class? it hides the arrow without further css.

Add no-arrow to drop-down toggle class declaration

This works on bootsrap4 and ng-bootstrap.

.dropdown-toggle:after {
    display: none;
}