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How to prevent event bubbling in blazor server side?

In my blazor server side application I have cards representing datasets, which the user can manage.
They look like this:
The relevant code looks like this:
<div class="card h-100 text-dark" #onclick="() => OnDatasetSelected(dataset)">
<!-- header image -->
<div class="card-body position-relative">
<div class="dropdown dropstart">
<button type="button" data-bs-toggle="dropdown" aria-expanded="false">
<i class="bi bi-three-dots-vertical"></i>
</button>
<ul class="dropdown-menu">
<!-- menu content -->
</div>
<!-- card content -->
</div>
As one can see from the code, I'm currently adding the context menu (three vertical dots) using the template code from bootstraps dropdown (dropleft in my case) component.
This works fine - or rather it would if it weren't for the #onclick event on the card, which calls the code to select the dataset and navigate to another page.
Question basically is: How can I prevent the OnClick event, if an element inside is being clicked on. I guess, what I'm asking is: How can I prevent event bubbling in HTML? Is it possible without adding code to the inner dropdown element (display of bootstrap-dropdowns is done with popper.js, which is external)

Lol, found the answer here 5 minutes after posting:
Simply use onclick="event.stopPropagation();" to prevent the event bubbling.
So in the end I just add this to the dropdown container:
<div class="dropdown dropstart position-absolute top-0 end-0 " onclick="event.stopPropagation();">
<button type="button" class=" btn btn-outline-secondary fs-5 p-0 m-2 border-0"
data-bs-toggle="dropdown" aria-expanded="false">
<i class="bi bi-three-dots-vertical"></i>
</button>
<ul class="dropdown-menu">
<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>
And now I can click my menu button:
Important Edit:
In case you have issues with onclick="event.stopPropagation();" preventing the #onclick event of the inner button to be fired, one can use the following directly at the inner button:
<button type="button" #onclick="MyFunction"
#onclick:stopPropagation="true">
Button Text
</button>
This will call MyFunction when clicking the button, but prevents the event to be propagated to the parent elements.

Bootstrap Dropdown Button Changes Position

I was following the documentation found here: https://getbootstrap.com/docs/4.1/components/dropdowns/
and added the following dropdown button:
<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>
The issue I'm having is that when the button is clicked on to display the dropdown-menu, the button changes it's position. This happens with both dropdown buttons I have.
Buttons Without Dropdown Clicked
Dropdown Clicked & Button Changed Position Example 1
Dropdown Clicked & Button Changed Position Example 2
You can see example code of this issue occurring: https://codepen.io/danfuentes/pen/MWaYOgz
How can I get it so that the button stays in place with the menu items appearing below it?

Surround your elements in a parent div element with btn-grp class like so:
<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>

You will need to provide the HTML that surrounds the button element along with the css for all of those elements.
Can you update your question with this information so that we can see what's going on beyond just the button tag?
Update after seeing codepen:
You had a couple of div tags in the incorrect place, please see below for the solution:
<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 tesdt</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>
Basically you want to wrap all of your buttons within a single div with a class of "dropdown".
The dropdown class declares the css position:relative which will ensure the positioning is correct for the dropdowns to display correctly without shifting other elements on the page around.
Update 2: I've updated the HTML above to resolve the new problem you encountered. You will need to wrap the individual dropdowns in div's with the class of "dropdown" to ensure they can have individual links. To make sure they do not shift from their intended positions all of the buttons are now wrapped in a div with the class of "btn-group".
The "btn-group" class ensures the position is set to relative however by default it introduces a few other styling quirks such as removing the spacing between the buttons. In order to override this I've also added the following to the css:
button {
margin: 10px !important
}
The above grabs all buttons on the page and gives them an all-round margin of 10px.
If you want to overwrite any bootstrap class stylings you will need to set the !important property on those elements.
Codepen with the solution:
https://codepen.io/pen/pojvprg

Bootstrap dropdown not working when parent has a click event

I have a Bootstrap dropdown menu inside a container that triggers an event--the way I want it to work is, if you click the dropdown button, the menu items are displayed as normal. If you click anywhere else within the container, the parent event should be triggered (in this case displaying a Javascript alert). Instead, the event is being triggered even when I click the dropdown button.
Is there some way I can get the dropdown click event to "override" its parent event, so that if it's clicked its own evnet will be triggered the parent event won't?
<div class='main-container' onClick='alert("a thing was clicked!")'>
<div class="dropdown">
<button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Dropdown button
</button>
<div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
<a class="dropdown-item" href="#">Action 1</a>
<a class="dropdown-item" href="#">Action 2</a>
<a class="dropdown-item" href="#">Action 3</a>
</div>
</div>
</div>
http://jsfiddle.net/0fpbcy2L/12/

Bootstrap jQuery dynamic table edit/delete/view button not working

I'd appreciate any help on this. I have this DataTable with the last column being a button that spans various options such as Edit/Delete/View. Upon clicking that, it should delete the entire row. However, I'm not able to get the currently clicked element.
Here's my code
$('.dropdown-menu a').click(function(e){
console.log($(this).data('value'));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<td>
<span class="dropdown">
<button id="btnSearchDrop_{{ index }}" type="button" data-toggle="dropdown" aria-haspopup="true"
aria-expanded="true"
class="btn btn-primary dropdown-toggle dropdown-menu-right"><i
class="ft-settings"></i></button>
<span id='selected' aria-labelledby=btnSearchDrop_{{ index }}" class="dropdown-menu mt-1 dropdown-menu-right">
<i class="ft-edit-2"></i> Edit
<i class="ft-trash-2"></i> Delete
<i class="ft-plus-circle primary"></i> View
</span>
</span>
</td>
This should log the id of tag but it doesn't.

I am not sure which version of jquery you are using but .data() function works in versions 1.4.3 and above. I tested your code here with jquery-3.3.1, which worked fine. Another way to get what you want would be to use .attr() function instead of .data() like:
alert($(this).attr('data-value'));

Passing link-value from dropdown to another button

I'm currently working on an ordering system that allows the user to choose a specified vendor from a dropdown-menu and comfirm their selection by clicking a seperate button.
A perfect example would be the Fallout 4 store page, where the "Order"-button is disabled until an item has actually been selected from the dropdown menu. (In my case there is only one dropdown menu).
I've got the following HTML:
<div class="col-md-12">
<div class="productRow">
<div class="row">
<div class="col-md-1"></div>
<div class="col-md-5">
<div class="dropdownPositionLeft">
<div class="dropdown">
<button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
Choose your platform!
<span class="caret"></span>
</button>
<ul class="dropdown-menu" aria-labelledby="dropdownMenu1">
<!-- List of vendors -->
<li><a tabindex="-1">Item I</a></li>
<li><a tabindex="-1">Item II</a></li>
<li><a tabindex="-1">Item III</a></li>
</ul>
</div>
</div>
</div>
<div class="col-md-5">
<div class="dropdownPositionRight">
<!-- This is the button that confirms the selection and takes the user to the specified vendor from the dropdown menu -->
Order now!
</div>
</div>
</div>
</div>
And the following javascript that replaces the label of the dropdown-button:
$(".dropdown-menu li a").click(function(){
$(this).parents(".dropdown").find('.btn').html($(this).text() + ' <span class="caret"></span>');
$(this).parents(".dropdown").find('.btn').val($(this).data('value'));}
I want the "Ordner now"-button to be able to receive an external link to a vendor based on the dropdown menu. Meaning I would need to pass a variable to the button from the dropdown menu - So far I haven't managed to succeed in this.
I'm very new to both bootstrap and javascript and was hoping someone here might point me in the right direction as to how I should handle this.
I'm assuming I should be able to store an href-value with the items in the dropdown-menu and pass them on to the order-button when selected, but I've had no luck in trying to figure this out while at the same time not pointing the player directly to the vendor through the dropwdown-menu.
I've also experimented with forms without the desired effect. Obviously I'm doing something wrong, but not sure as to what it is.

Check out the information for using bootstrap buttons here: http://v4-alpha.getbootstrap.com/components/buttons/
I usually take the button and then wrap it in the tag like this:
<button type="button" class="btn btn-primary" disabled>Primary</button>
Notice how I made the button disabled by default, then you can use javascript/jquery to remove the disabled attribute when a certain action is performed on the page.
As far as setting it based on a different box being selected, you can also set the href="" attribute using jquery if you want it to live update without reloading the page, or if you're not worried about the page needing to be reloaded, you could use inside the href quotes.