Develop Reference

Set outline border on a focused element

My code loads various items on some button click event into the document.
I managed to set the focus properly on the first item from those freshly loaded items once there all have been displayed using the following code:
$(function () {
$("a.getfocus").focus();
});
This works but I would also like the browser's default outline to show up on this focused item.
Is there any easy solution to achieve this ?

With the :focus pesudoselector to the element and the outline property:
outline: [properties]
Say, you have a link which usually shows an outline on focus (yep, that's the default behaviour):
<a id="test" href="https://test.com">Test</a>
With CSS, you can do the following:
#test {
outline: 1px dotted red;
}
to get a red outline. Usually, you'd want to do:
a {
outline: none;
}
Back to your question, you can do:
a:focus {
...
// rules
...
}
You can see a small sample here.

CSS/JavaScript - Adding the :focus state when an element is hovered

So I have a navigation bar using standard Bootstrap 3 classes and structure, recently I wanted to see if you could open the drop down menus on hover.
I did some searching and found this snippet:
.dropdown:hover .dropdown-menu{
display: block;
}
This opens the menu on hover, which is great (without having to toggle .dropdown-toggle
My issue is that my .dropdown-toggle has a focus state, which only happens when focus is given to the element, so when I hover and the menu opens my hover state is never applied, as I do not have to click on the top menu item anymore.
So the question is: is there a way to force the :focus state when :hover is active?
I tried to do this:
.dropdown:hover #home .dropdown-toggle:focus{
background: #00aaff;
border: #00aaff 1px solid;
}
So basically on hover add styles to the focus, but I think what I actually need to do is add the :focus class on :hover so is this more a JavaScript thing?

$(".dropdown").hover(function(){
$('#home .dropdown-toggle').focus();
});
And in css
#home .dropdown-toggle:focus{
background: #00aaff;
border: #00aaff 1px solid;
}
when the focus is on, the css gets apply.

I see it as 'a JavaScript thing'. You can attach a 'mouseover' event to the menu, which, when triggered, will change the menu's CSS and the CSS of the .dropdown-toggle element.
I do not think it makes a lot of sense to trigger "focus" state for CSS modification if you are using JavaScript (in this particular example, I will use JQuery library).
A simple example: https://jsfiddle.net/matu2vd6/5/
HTML:
<div class='dropdown'>My dropdown element.</div>
<div class='dropdown-toggle'>My dropdown-toggle element.</div>
JS/JQUERY:
let dropDownEl = $(".dropdown");
let dropDownToggleEl = $(".dropdown-toggle");
dropDownEl.on("mouseover", function() {
dropDownToggleEl.css({"background": "#00aaff",
"border": "#00aaff 1px solid"});
});
dropDownEl.on("mouseout", function() {
dropDownToggleEl.css({"background": "transparent",
"border": "none"});
});

Why do Angular UI buttons have a different focus border in Chrome than they do in IE?

Can anyone tell me why button focus borders are rendered with a black dashed border by default in IE11 and with a blue solid border in Chrome? You can see this if you go to http://angular-ui.github.io/ and tab over the Site/Code buttons with IE11 and Chrome.
I've tried various overrides like -webkit-appearance:none etc to no avail. Is this an AngularUI bug, or a browser quirk everybody knows about and have been working around that I'll need to special-case if I want the look to be uniform?

When you tab over the button, you are applying the element's :focus styling. Looking at the stylesheet which is being used, I cannot see any custom styling for this, so the browser is providing it's default focus styling.
If you want to override this, then you can write your own focus style. So for this particular button, you can use:
a.btn.btn-primary.btn-large:focus{
outline: 0;
/* add other styling to it */
}
Or if you want to just target all anchors on the page, then use
a:focus{
outline: 0;
}

Angular is adding the dotted lines on this occasion - to remove, do this in your CSS;
.btn-group > .btn:hover, .btn-group > .btn:focus, .btn-group > .btn:active, .btn-group > .btn.active {
outline: 0;
}

Change background color via a checkbox when checked with Jquery

I'm trying to change the background color of a div with a checkbox in it. I've made this for reference. I'm trying to replace the parent <div> with the 'highlight' <div>, so I thought the toggle <div> would work. When the checkbox is deselected, I would like the background color to go back to normal (or remove the 'highlight' <div>). Any help is appreciated.

You are setting an inline background-color style for the divs. This takes precedence over any properties you set via a CSS rule.
Add !important to the background-color value of the checked class in your css file, like so: http://jsfiddle.net/KtsGs/1/

There are a few issues present in the jsFiddle.
The first one is that, despite having written jQuery code, you haven't selected jQuery as the framework on the left hand side. That's a small issue specific to the code on jsFiddle, and easily fixed, though.
The second issue is that you have inline styles on the <div> elements, including a background-color. That inline style will be used in preference to any background-color specified using a CSS class (unless it's specified as being !important), so even when your code correctly adds the checked class to the element, the background colour isn't going to change.
The simplest solution is to simply change your CSS declaration:
.checked {
background-color: #ff0000 !important;
}
Here is an updated version of your jsFiddle with the working functionality (using the suggestion above).
However, I'd suggest you instead move the inline styles and JavaScript event handlers to their own CSS declarations, so you don't have to specify !important. That would require the following changes:
#holder > div {
clear: both;
padding: 0.5%;
margin-bottom: 1px;
border-bottom: 1px solid #eee;
float: left;
width: 96%;
style: height: 16px;
cursor: pointer;
background-color: white; // added this to the existing CSS
}
#holder > div:hover { // this is new
background-color: #fafafa;
}
Then move the CSS declaration for .checked below those, so that it takes precedence for the background-color property.
Here is another updated version of your jsFiddle, using the CSS declarations instead.

Can we change the traversal identifier in HTML page from a dotted rectangle to a block?

When we traverse in an HTML page by pressing the tab key , a dotted rectangle appears , by which we can identify the position/element in the page. My question is can i make it a block i.e the selected elements(links , tabs) color and background will change at the time of traverse ?

You can override the browser's default style as described in this MDC article.
Basic example:
:focus {
background-color: #aaa;
outline: 1px solid red;
}
Demo: http://jsbin.com/otoco5
The :focus selector works in every browser you could expect, except IE 6 and 7.1,2

You can create a CSS rule using the :focus pseudo-class:
The :focus pseudo-class applies while an element has the focus (accepts keyboard events or other forms of text input).