How can I add animation to the dropdown? I assume by modifying popperConfig, but how?
At the moment dropdown-menu has a generated inline style, e.g. position: absolute; inset: 0px auto auto 0px; margin: 0px; transform: translate3d(0px, 40px, 0px);
Of course I can just add transition: translate .3s ease
to it, but what if I want to change the direction or something more complex?
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Answer
In the current example, the dm-example
will be the dropdown menu that shows up.
HTML will not differ much from its Bootstrap5 examples:
<div class="dropdown"> <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton1" data-bs-toggle="dropdown" aria-expanded="false"> Dropdown button </button> <ul id="dm-example" class="dropdown-menu " aria-labelledby="dropdownMenuButton1 "> <li><a class="dropdown-item " href="# ">Action</a></li> <li><a class="dropdown-item " href="# ">Another action</a></li> <li><a class="dropdown-item " href="# ">Something else here</a></li> </ul> </div>
For CSS animation rules handling:
#dm-example.show
– describes initial styles for the block;
#dm-example.show .dropdown-item
– describes initial styles for inner items;
dm-animation
– is the animation on block;
item-animation
– is the animation on items.
<!-- Animate dropdown --> <style> #dm-example.show { position: fixed; animation-name: dm-animation; animation-duration: 2s; } #dm-example.show .dropdown-item { margin-bottom: 0; animation-name: item-animation; animation-duration: 2s; } @keyframes dm-animation { 0% { margin-top: 0px; } 50% { margin-top: 25px; } 75% { margin-top: 5px; } 100% { margin-top: 0px; } } @keyframes item-animation { 0% { margin-bottom: 0px; } 50% { margin-bottom: 25px; } 75% { margin-bottom: 5px; } 100% { margin-bottom: 0px; } } </style>