Safari: focus event doesn't work on button element

Question

The focus event works fine on all browsers but Safari when it has been clicked.

And it works fine on div[tabindex] element, but don't work on button or input:button element.

It also can get the focus event when I use $('.btn').focus().

Why does the focus event haven't triggered on click ?

Here is my code:

$(".btn").focus(function (e) {
	$(".result").append("<p>Event:"+e.type+", target:"+e.target+"</p>");
})

.result{min-height:200px;border:1px solid #000;}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<button class="btn">button 1</button>
<input type="button" class="btn" value="button 2"/>
<div class="btn" tabindex="0">div element</div>
<h1>
Result:
</h1>
<div class="result">

</div>

Answer 1

Documentation tells is not supported: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/button#Clicking_and_focus

Answer 2

Why does the focus event haven't triggered on click ?

We found through research that Safari and FireFox on Macs do not set focus on buttons when you click on them.

The way we fixed that was to add a click listener to our buttons and call focus() on the button that was clicked.

In Angular it looked like this:

<button (click)="myClickFunction(); $event.target.focus();>My Button</button>