Develop Reference

How do I create this hover button Using HTML, css and javascript

`
/* Button */
.button {
margin: 1em 0em;
}
.circle {
width: 50px;
height: 50px;
border-radius: 50%;
background: #1A718A;
position:relative;
}
.button h3{
position:relative;
top:3.4em;
left:.5em;
color: white;
font-weight: 400!important;
font-size:.9em!important;
z-index: 1;
}
.circle:hover {
position:relative;
top:1em;
left:3em;
}
<div class="button">
<div class="text"><h3>- View <span>Work</span></h3></div>
<div class="circle"></div>
</div> <!--button-->
`How do I create this hover button Using HTML, css and javascript.
The circle moves to the right(no effects) whilst the view turns grey and the work turns white(inverse).
Also a code newbie :)
Default State
Hover state
Thankyou

Recreation
HTML
We want to animate an element and its text "- View Work", so the simplest HTML we can have is:
<p>- View Work</p>
Styling
Default style
We can then style it as much as necessary. To place the line in the middle, we can trick a little by setting line-height to the element's height with a bit of JavaScript:
const p = document.querySelector('p');
p.style = '--height:' + getComputedStyle(p).getPropertyValue('height');
p {
position: relative;
border: 1px solid black;
color: black;
background-color: #f3f3f3;
width: 14rem;
height: 10rem;
font-weight: bold;
font-family: sans-serif;
text-align: center;
line-height: var(--height);
text-transform: uppercase
}
<p>- View Work</p>
With flashlight-effect
Now we want to add the circle, in which the text's color is different.
We could probably use mix-blend-mode in some way, however I don't understand it well enough to make it work with it.
Because of that, we fall back to using pseudo-elements (more specifically, ::after).
The pseudo-element needs to ...:
... have the same text in a different color, and have the texts overlap
... be big enough to fit the revealing circle in all its positions inside
... clip out the rest not inside the revealing circle
The first two bullet points are as simple as styling the pseudo-element and the parent mostly the same way.
To get the text, we can again use JavaScript by setting a custom data-attribute (e.g. data-text) to have the text. The pseudo-element can then display the text with content: attr(data-text).
For the revealing circle, we give the pseudo-element a background-color. Then, we use clip-path to cut out what should be "revealed".
And on hover, we transition between two different positions of the revealing circle.
const p = document.querySelector('p');
p.dataset.text = p.innerText;
p.style = '--height:' + getComputedStyle(p).getPropertyValue('height');
p {
position: relative;
border: 1px solid black;
color: black;
background-color: #f3f3f3;
}
p, p::after {
width: 14rem;
height: 10rem;
font-weight: bold;
font-family: sans-serif;
text-align: center;
line-height: var(--height);
text-transform: uppercase
}
p::after {
content: attr(data-text);
position: absolute;
top: 0;
left: 0;
color: white;
background-color: #1A718A;
clip-path: circle(3rem at 70px 55px);
transition: clip-path 0.15s;;
pointer-events: none;
}
p:hover::after {
clip-path: circle(3rem at 155px 100px);
}
<p>- View Work</p>
End note
This sample-code only works for one-liners, and requires the element to have a fixed size.
The effect can also be achieved by using mostly JavaScript, where one could mock-up such
a pseudo-element with actual HTML-elements, and then overlay said element over the original.

Why is scrollWidth not including a child element's right margin?

I'm trying to have a <div> slide open to the minimum size required to contain its content without anything overflowing.
Here's what I've got so far:
window.onload = function() {
setTimeout(() => {
var thing = document.getElementById('thing');
thing.style.maxWidth = thing.scrollWidth + "px";
thing.style.maxHeight = thing.scrollHeight + "px";
}, 1000);
}
body {
background-color: black;
}
p {
margin: 40px;
padding: 0;
color: yellow;
background-color: green;
font-family: monospace;
}
div.expander {
margin: 0;
padding: 0;
max-width: 0;
max-height: 0;
overflow: hidden;
transition:
max-width 1s,
max-height 1s;
border: 1px solid red;
}
hr {
margin: 0;
padding: 0;
border-top: 1px solid blue;
border-right: none;
border-bottom: none;
border-left: none;
}
<div id="thing" class="expander">
<p>Hello, world!</p>
<hr>
<p>Goodbye, world!</p>
</div>
See how neither <p> is wide enough to contain its text without overflowing? That's what I'm trying to prevent. Clearly, scrollHeight is doing what I expect. Why isn't scrollWidth?

This isn't the full picture, but margin-right (or margin-left) gets ignored in specific scenarios. This is intended block functionality in CSS. From the specs:
'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block
If all of the above have a computed value other than 'auto', the values are said to be "over-constrained" and one of the used values will have to be different from its computed value. If the 'direction' property of the containing block has the value 'ltr', the specified value of 'margin-right' is ignored and the value is calculated so as to make the equality true. If the value of 'direction' is 'rtl', this happens to 'margin-left' instead.
In my opinion, this isn't very intuitive behavior and I prefer to avoid margins for block layout where possible (for more reasons than just this). So, you could add a wrapper <div> around your <p> tags and use padding instead. This also enables you to use a border between items instead of adding <hr> to your content. I think the proper semantics could go either way, depending on your real-world usage of this. To quote the MDN docs:
The HTML <hr> element represents a thematic break between paragraph-level elements: for example, a change of scene in a story, or a shift of topic within a section.
Historically, this has been presented as a horizontal rule or line. While it may still be displayed as a horizontal rule in visual browsers, this element is now defined in semantic terms, rather than presentational terms, so if you wish to draw a horizontal line, you should do so using appropriate CSS.
But, while that fixes a few concerns, that doesn't fix everything. The calculated width of the <p> elements is still less than min-content. So, we can force this with min-width: min-content;, or by using a different display value (probably on expander). This changes which algorithms are used for calculating widths under the hood.
Last note before the full example code: max-width and max-height are a decent trick but are really only useful for this kind of thing if you're trying to avoid modifying styles from JS (think :hover or adding and removing an .open class from JS, instead of setting width and height, directly)
setTimeout(() => {
const expander = document.querySelector('.js-expander');
expander.style.width = expander.scrollWidth + "px";
expander.style.height = expander.scrollHeight + "px";
}, 1000);
body {
background-color: black;
}
.expander {
display: grid;
width: 0px;
height: 0px;
overflow: hidden;
border: 1px solid red;
transition:
width 1s,
height 1s;
}
.expander-item {
padding: 40px;
font-family: monospace;
border-bottom: 1px solid blue;
}
.expander-item:last-child { border-bottom: 0px; }
.expander-item > * {
color: yellow;
background-color: green;
}
.expander-item > :first-child { margin-top: 0; }
.expander-item > :last-child { margin-bottom: 0; }
<div class="expander js-expander">
<div class="expander-item">
<p>Hello, world!</p>
</div>
<div class="expander-item">
<p>Goodbye, world!</p>
</div>
</div>
UPDATE: Based on comments, I thought I might include how <hr/> might be added back in:
setTimeout(() => {
const expander = document.querySelector('.js-expander');
expander.style.width = expander.scrollWidth + "px";
expander.style.height = expander.scrollHeight + "px";
}, 1000);
body {
background-color: black;
}
.expander {
display: grid;
width: 0px;
height: 0px;
overflow: hidden;
border: 1px solid red;
transition:
width 1s,
height 1s;
}
.expander-group {
padding: 40px;
font-family: monospace;
}
.expander-group > * {
color: yellow;
background-color: green;
}
.expander-group > :first-child { margin-top: 0; }
.expander-group > :last-child { margin-bottom: 0; }
.expander > hr {
margin: 0;
padding: 0;
border-top: 1px solid blue;
border-right: none;
border-bottom: none;
border-left: none;
}
<div class="expander js-expander">
<div class="expander-group">
<p>Hello, world 1!</p>
<p>Hello, world 2!</p>
</div>
<hr>
<div class="expander-group">
<p>Goodbye, world!</p>
</div>
</div>

Display div upon hover

I am trying to make a div display when hovering over an a tag. I also want the div to not disappear when the mouse moves onto the displayed div. Although I want the div to disappear when you aren't hovering on the a tag text or the div itself.
This is being specifically used for a navigation bar that can display content on one of the tabs when hovering over it.
I have tried using the .div-name + .div-name2 {} method, but since I have content between these two divs, this solution does not work.
If there is a better way of doing this e.g. through some sort of bootstrap mechanic, that would be great to know as well as I am sure I am over-complicating this using javascript and jquery. Otherwise helping me with the javascript/jquery would be greatly appreciated.
$(".hover-btn").mouseenter(function() {
$(".hover-btn-section").stop().fadeIn(500);
});
$(".hover-btn").mouseleave(function() {
$(".hover-btn-section").stop().delay(500).fadeOut(500);
});
$(".hover-btn-section").mouseenter(function() {
$(".hover-btn-section").stop();
});
.hover-btn {
border: 1px solid red;
}
.hover-btn-section {
display: none;
width: 100%;
border: 1px solid green;
background-color: yellow;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<a href="#" class='hover-btn'>hover-btn</a>
<a href="#" class='link2'>link2</a>
<div class="hover-btn-section">
<p>Testing Area</p>
</div>

What you describe can be achieved using CSS only. Instead of the adjacent sibling selector + use the sibling selector ~:
.hover-btn {
border: 1px solid red;
}
.hover-btn:hover ~ .hover-btn-section {
opacity: 1;
pointer-events: all;
}
.hover-btn-section {
opacity: 0;
width: 100%;
border: 1px solid green;
background-color: yellow;
pointer-events: none;
transition: opacity .3s ease-in-out;
}
.hover-btn-section:hover {
opacity: 1;
pointer-events: all;
}
hover-btn
link2
<div class="hover-btn-section">
<p>Testing Area</p>
</div>

Blurring background in only a select area (behind text)

I'm creating a homepage using HTML/CSS/Javascript, on this page I have text floating on the top left portion of the screen. I have a number of backgrounds saved from Reddit and a script which randomly selects one upon start, my problem is that because this background can be any colour it is difficult for the text to be readable, so my idea was to blur the background around just the text in order to make it readable. Ideally, it would follow just the text and blur the outline of it but I tried placing it in a box, however, because it uses relative layout it was difficult to have the box fill and blur the minimum space possible.
How can I improve the readability of text by blurring the background just around the text? I'm also open to other suggestions to improve readability (remembering the background changes)

Try using the CSS3 filters: https://www.inserthtml.com/2012/06/css-filters/
The link above should have a guide on how to blur image and you should be able to modify this to fit your requirements.

You have chosen the difficult way. Simply use CSS text-shadow Property. For example if the text is in black, use white shadow color for it.
Example:
body {
background-image: url('https://images.template.net/wp-content/uploads/2015/09/01191816/Perfect-Summer-Background-Free-Download.png');
background-size: cover
}
.text {
color: #000;
font-size: 3em;
text-shadow: 0 0 10px #fff, 0 0 10px #fff, 0 0 10px #fff
}
<div class="text">Some Text</div>

It's a quick n dirty fix... but I usually just add a contrast background color to the text wrapper (like the first one in the example below). You can also use blur filter if you want. I referred to this article frosting glass css filter for the second one. But in the comment of that article, some say there's a trade off of performance.
#bg {
background: url(https://picsum.photos/500/400?image=0) center center no-repeat;
background-size: cover;
width: 500px;
height: 300px;
margin-bottom: 30px;
}
#text-wrap1 {
padding: 30px;
background-color: rgba(255,255,255,0.7);
text-shadow: 1px 1px 1px white;
width: 150px;
}
#text-wrap2 {
padding: 30px;
width: 150px;
position: relative;
}
#text-wrap2 p {
position: relative;
text-shadow: 1px 1px 1px white;
}
#text-wrap2:before {
content: '';
display: block;
width: 100%;
height: 100%;
background-color: white;
position: absolute;
left:0;
top:0;
-webkit-filter: url('#blur');
filter: url('#blur');
-webkit-filter: blur(5px);
filter: blur(5px);
background-size: cover;
opacity: 0.7;
}
<div id="container">
<div id="bg">
<div id="text-wrap1">
This is a random paragraph
</div>
</div>
<div id="bg">
<div id="text-wrap2">
<p>This is a random paragraph</p>
</div>
</div>
</div>

Adding a rounded similar to border-radius to outline [duplicate]

Is there any way of getting rounded corners on the outline of a div element, similar to border-radius?

I had an input field with rounded border and wanted to change colour of focus outline. I couldn't tame the horrid square outline to the input control.
So instead, I used box-shadow. I actually preferred the smooth look of the shadow, but the shadow can be hardened to simulate a rounded outline:
input, input:focus {
border: none;
border-radius: 2pt;
box-shadow: 0 0 0 1pt grey;
outline: none;
transition: .1s;
}
/* Smooth outline with box-shadow: */
.text1:focus {
box-shadow: 0 0 3pt 2pt cornflowerblue;
}
/* Hard "outline" with box-shadow: */
.text2:focus {
box-shadow: 0 0 0 2pt red;
}
<input class="text1">
<br>
<br>
<input type=text class="text2">

I usually accomplish this using the :after pseudo-element:
of course it depends on usage, this method allows control over individual borders, rather than using the hard shadow method.
you could also set -1px offsets and use a background linear gradient (no border) for a different effect once again.
body {
margin: 20px;
}
a {
background: #999;
padding: 10px 20px;
border-radius: 5px;
text-decoration: none;
color: #fff;
position: relative;
border: 2px solid #000;
}
a:after {
content: '';
display: block;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
border-radius: 5px;
border: 2px solid #ccc;
}
Button

Similar to Lea Hayes above, but here's how I did it:
div {
background: #999;
height: 100px;
width: 200px;
border: #999 solid 1px;
border-radius: 10px;
margin: 15px;
box-shadow: 0px 0px 0px 1px #fff inset;
}
<div></div>
No nesting of DIVs or jQuery necessary, Altho for brevity I have left out the -moz and -webkit variants of some of the CSS. You can see the result above

Use this one:
box-shadow: 0px 0px 0px 1px red;

I wanted some nice focus accessibility for dropdown menus in a Bootstrap navbar, and was pretty happy with this:
a.dropdown-toggle:focus {
display: inline-block;
box-shadow: 0 0 0 2px #88b8ff;
border-radius: 2px;
}
Visit Stackoverflow

We may see our wishes soonish by setting outline-style: auto It's on WebKits radar: http://trac.webkit.org/changeset/198062/webkit
See ya in 2030.

You're looking for something like this, I think.
div {
-webkit-border-radius: 10px;
-moz-border-radius: 10px;
border-radius: 10px;
border: 1px solid black;
background-color: #CCC;
height: 100px;
width: 160px;
}
Edit
There is a Firefox-only -moz-outline-radius properly, but that won't work on IE/Chrome/Safari/Opera/etc. So, it looks like the most cross-browser-compatible way* to get a curved line around a border is to use a wrapper div:
div.inner {
-webkit-border-radius: 10px;
-moz-border-radius: 10px;
border-radius: 10px;
border: 1px solid black;
background-color: #CCC;
height: 100px;
width: 160px;
}
div.outer {
display: inline-block;
-webkit-border-radius: 10px;
-moz-border-radius: 10px;
border-radius: 10px;
border: 1px solid red;
}
<div class="outer">
<div class="inner"></div>
</div>
*aside from using images

Firefox 88+: border-radius
From April 2021 you will be able to use a simple CSS for Firefox:
.actual {
outline: solid red;
border-radius: 10px;
}
.expected {
border: solid red;
border-radius: 10px;
}
In Firefox 88+,
<span class="actual">this outline</span>
should look like
<span class="expected">this border</span>
Current behaviour in Firefox 86.0:
Webkit: no solution
Using outline-style: auto will tell the «user agent to render a custom outline style»: see [MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/outline-style(.
Webkit-based browsers will then draw the outline over the border, when you use outline-style: auto. It's difficult to style it properly.
.actual {
outline: auto red;
border-radius: 10px;
}
.expected {
border: solid red;
border-radius: 10px;
}
In WebKit browsers (Chrome, Edge),
<span class="actual">this outline</span>
should look close to
<span class="expected">this border</span>
Current behaviour in Chrome 89.0:
More information
From Firefox 88 (to be released April 20 2021), outline will follow the shape of border-radius.
The current -moz-outline-radius will become redundant and will be removed.
See MDN's entry about -moz-outline-radius:
From Firefox 88 onwards, the standard outline property will follow the shape of border-radius, making -moz-outline-radius properties redundant. As such, this property will be removed.

(Feb 2023)
As far as I know, the Outline radius is only supported by Firefox and Firefox for android.
-moz-outline-radius: 1em;

I just found a great solution for this, and after looking at all the responses so far, I haven't seen it posted yet. So, here's what I did:
I created a CSS Rule for the class and used a pseudo-class of :focus for that rule. I set outline: none to get rid of that default light-blue non-border-radius-able 'outline' that Chrome uses by default. Then, in that same :focus pseudo-class, where that outline no longer exists, I added my radius and border properties. Leading to the following
outline: none;
border-radius: 5px;
border: 2px solid maroon;
to have a maroon-colored outline with a border radius that now appears when the element is tab-selected by the user.

If you want to get an embossed look you could do something like the following:
.embossed {
background: #e5e5e5;
height: 100px;
width: 200px;
border: #FFFFFF solid 1px;
outline: #d0d0d0 solid 1px;
margin: 15px;
}
.border-radius {
border-radius: 20px 20px 20px 20px;
-webkit-border-radius: 20px;
-moz-border-radius: 20px;
-khtml-border-radius: 20px;
}
.outline-radius {
-moz-outline-radius: 21px;
}
<div class="embossed"></div>
<div class="embossed border-radius"></div>
<div class="embossed border-radius outline-radius">-MOZ ONLY</div>
I have not found a work around to have this work in other browsers.
EDIT: The only other way you can do this is to use box-shadow, but then this wont work if you already have a box shadow on that element.

Chrome 94.0+
I tested it in chrome 94.0 and it seems that the outline property honors the border-radius now.
.outline {
outline: 2px solid red;
}
.border {
border: 2px solid red;
}
.outline-10 {
border-radius: 10px;
}
.border-2 {
border-radius: 2px;
}
.outline-2 {
border-radius: 2px;
}
.border-10 {
border-radius: 10px;
}
.outline-50 {
border-radius: 50%;
}
.border-50 {
border-radius: 50%;
}
.circle {
display: inline-block;
width:50px;
height: 50px;
}
<strong>Test this in chrome 94.0+</strong>
<br/><br/>
border-radius: 2px
<span class="outline outline-2">outline</span>
<span class="border border-2">border</span>
<br/><br/>
border-radius: 10px
<span class="outline outline-10">outline</span>
<span class="border border-10">border</span>
<br/><br/>
border-radius: 50%
<span class="outline outline-50">outline</span>
<span class="border border-50">border</span>
<span class="outline circle outline-50">outline</span>
<span class="border circle border-50">border</span>

As others have said, only firefox supports this. Here is a work around that does the same thing, and even works with dashed outlines.
.has-outline {
display: inline-block;
background: #51ab9f;
border-radius: 10px;
padding: 5px;
position: relative;
}
.has-outline:after {
border-radius: 10px;
padding: 5px;
border: 2px dashed #9dd5cf;
position: absolute;
content: '';
top: -2px;
left: -2px;
bottom: -2px;
right: -2px;
}
<div class="has-outline">
I can haz outline
</div>

No. Borders sit on the outside of the element and on the inside of the box-model margin area. Outlines sit on the inside of the element and the box-model padding area ignores it. It isn't intended for aesthetics. It's just to show the designer the outlines of the elements. In the early stages of developing an html document for example, a developer might need to quickly discern if they have put all of the skeletal divs in the correct place. Later on they may need to check if various buttons and forms are the correct number of pixels apart from each other.
Borders are aesthetic in nature. Unlike outlines they are actually apart of the box-model, which means they do not overlap text set to margin: 0; and each side of the border can be styled individually.
If you're trying to apply a corner radius to outline I assume you are using it the way most people use border. So if you don't mind me asking, what property of outline makes it desirable over border?

COMBINING BOX SHADOW AND OUTLINE.
A slight twist on Lea Hayes answer
I found
input[type=text]:focus {
box-shadow: 0 0 0 1pt red;
outline-width: 1px;
outline-color: red;
}
gets a really nice clean finish. No jumping in size which you get when using border-radius

There is the solution if you need only outline without border. It's not mine. I got if from Bootstrap css file. If you specify outline: 1px auto certain_color, you'll get thin outer line around div of certain color. In this case the specified width has no matter, even if you specify 10 px width, anyway it will be thin line. The key word in mentioned rule is "auto".
If you need outline with rounded corners and certain width, you may add css rule on border with needed width and same color. It makes outline thicker.

I was making custom radio buttons and the best customisable way i've found is using pseudo elements like this: Codepen
/*CSS is compiled from SCSS*/
.product-colors {
margin-bottom: 1em;
display: flex;
align-items: center;
}
.product-colors label {
position: relative;
width: 2.1em;
height: 2.1em;
margin-right: 0.8em;
cursor: pointer;
}
.product-colors label:before {
opacity: 0;
width: inherit;
height: inherit;
padding: 2px;
border: 2px solid red;
border-radius: 0.2em;
content: "";
position: absolute;
z-index: 1;
background: transparent;
top: -4px;
left: -4px;
}
.product-colors input {
position: absolute;
opacity: 0;
width: 0;
height: 0;
}
.product-colors input:checked + label:before, .product-colors input:focus + label:before {
opacity: 1;
}
<div class="product-colors">
<input type="radio" name="cs" id="cs1" value="black">
<label for="cs1" style="background:black"></label>
<input type="radio" name="cs" id="cs2" value="green">
<label for="cs2" style="background:green"></label>
<input type="radio" name="cs" id="cs3" value="blue">
<label for="cs3" style="background:blue"></label>
<input type="radio" name="cs" id="cs4" value="yellow">
<label for="cs4" style="background:yellow"></label>
</div>

clip-path: circle(100px at center);
This will actually make clickable only circle, while border-radius still makes a square, but looks as circle.

The simple answer to the basic question is no. The only cross-browser option is to create a hack that accomplishes what you want. This approach does carry with it certain potential issues when it comes to styling pre-existing content, but it provides for more customization of the outline (offset, width, line style) than many of the other solutions.
On a basic level, consider the following static example (run the snippent for demo):
.outline {
border: 2px dotted transparent;
border-radius: 5px;
display: inline-block;
padding: 2px;
margin: -4px;
}
/* :focus-within does not work in Edge or IE */
.outline:focus-within, .outline.edge {
border-color: blue;
}
br {
margin-bottom: 0.75rem;
}
<h3>Javascript-Free Demo</h3>
<div class="outline edge"><input type="text" placeholder="I always have an outline"/></div><br><div class="outline"><input type="text" placeholder="I have an outline when focused"/></div> *<i>Doesn't work in Edge or IE</i><br><input type="text" placeholder="I have never have an outline" />
<p>Note that the outline does not increase the spacing between the outlined input and other elements around it. The margin (-4px) compensates for the space that the outlines padding (-2px) and width (2px) take up, a total of 4px.</p>
Now, on a more advanced level, it would be possible to use JavaScript to bootstrap elements of a given type or class so that they are wrapped inside a div that simulates an outline on page load. Furthermore, event bindings could be established to show or hide the outline on user interactions like this (run the snippet below or open in JSFiddle):
h3 {
margin: 0;
}
div {
box-sizing: border-box;
}
.flex {
display: flex;
}
.clickable {
cursor: pointer;
}
.box {
background: red;
border: 1px solid black;
border-radius: 10px;
height: 5rem;
display: flex;
align-items: center;
text-align: center;
color: white;
font-weight: bold;
padding: 0.5rem;
margin: 1rem;
}
<h3>Javascript-Enabled Demo</h3>
<div class="flex">
<div class="box outline-me">I'm outlined because I contain<br>the "outline-me" class</div>
<div class="box clickable">Click me to toggle outline</div>
</div>
<hr>
<input type="text" placeholder="I'm outlined when focused" />
<script>
// Called on an element to wrap with an outline and passed a styleObject
// the styleObject can contain the following outline properties:
// style, width, color, offset, radius, bottomLeftRadius,
// bottomRightRadius, topLeftRadius, topRightRadius
// It then creates a new div with the properties specified and
// moves the calling element into the div
// The newly created wrapper div receives the class "simulated-outline"
Element.prototype.addOutline = function (styleObject, hideOutline = true) {
var element = this;
// create a div for simulating an outline
var outline = document.createElement('div');
// initialize css formatting
var css = 'display:inline-block;';
// transfer any element margin to the outline div
var margins = ['marginTop', 'marginBottom', 'marginLeft', 'marginRight'];
var marginPropertyNames = {
marginTop: 'margin-top',
marginBottom: 'margin-bottom',
marginLeft: 'margin-left',
marginRight: 'margin-right'
}
var outlineWidth = Number.parseInt(styleObject.width);
var outlineOffset = Number.parseInt(styleObject.offset);
for (var i = 0; i < margins.length; ++i) {
var computedMargin = Number.parseInt(getComputedStyle(element)[margins[i]]);
var margin = computedMargin - outlineWidth - outlineOffset;
css += marginPropertyNames[margins[i]] + ":" + margin + "px;";
}
element.style.cssText += 'margin:0px !important;';
// compute css border style for the outline div
var keys = Object.keys(styleObject);
for (var i = 0; i < keys.length; ++i) {
var key = keys[i];
var value = styleObject[key];
switch (key) {
case 'style':
var property = 'border-style';
break;
case 'width':
var property = 'border-width';
break;
case 'color':
var property = 'border-color';
break;
case 'offset':
var property = 'padding';
break;
case 'radius':
var property = 'border-radius';
break;
case 'bottomLeftRadius':
var property = 'border-bottom-left-radius';
break;
case 'bottomRightRadius':
var property = 'border-bottom-right-radius';
break;
case 'topLeftRadius':
var property = 'border-top-left-radius-style';
break;
case 'topRightRadius':
var property = 'border-top-right-radius';
break;
}
css += property + ":" + value + ';';
}
// apply the computed css to the outline div
outline.style.cssText = css;
// add a class in case we want to do something with elements
// receiving a simulated outline
outline.classList.add('simulated-outline');
// place the element inside the outline div
var parent = element.parentElement;
parent.insertBefore(outline, element);
outline.appendChild(element);
// determine whether outline should be hidden by default or not
if (hideOutline) element.hideOutline();
}
Element.prototype.showOutline = function () {
var element = this;
// get a reference to the outline element that wraps this element
var outline = element.getOutline();
// show the outline if one exists
if (outline) outline.classList.remove('hide-outline');
}
Element.prototype.hideOutline = function () {
var element = this;
// get a reference to the outline element that wraps this element
var outline = element.getOutline();
// hide the outline if one exists
if (outline) outline.classList.add('hide-outline');
}
// Determines if this element has an outline. If it does, it returns the outline
// element. If it doesn't have one, return null.
Element.prototype.getOutline = function() {
var element = this;
var parent = element.parentElement;
return (parent.classList.contains('simulated-outline')) ? parent : null;
}
// Determines the visiblity status of the outline, returning true if the outline is
// visible and false if it is not. If the element has no outline, null is returned.
Element.prototype.outlineStatus = function() {
var element = this;
var outline = element.getOutline();
if (outline === null) {
return null;
} else {
return !outline.classList.contains('hide-outline');
}
}
// this embeds a style element in the document head for handling outline visibility
var embeddedStyle = document.querySelector('#outline-styles');
if (!embeddedStyle) {
var style = document.createElement('style');
style.innerText = `
.simulated-outline.hide-outline {
border-color: transparent !important;
}
`;
document.head.append(style);
}
/*########################## example usage ##########################*/
// add outline to all elements with "outline-me" class
var outlineMeStyle = {
style: 'dashed',
width: '3px',
color: 'blue',
offset: '2px',
radius: '5px'
};
document.querySelectorAll('.outline-me').forEach((element)=>{
element.addOutline(outlineMeStyle, false);
});
// make clickable divs get outlines
var outlineStyle = {
style: 'double',
width: '4px',
offset: '3px',
color: 'red',
radius: '10px'
};
document.querySelectorAll('.clickable').forEach((element)=>{
element.addOutline(outlineStyle);
element.addEventListener('click', (evt)=>{
var element = evt.target;
(element.outlineStatus()) ? element.hideOutline() : element.showOutline();
});
});
// configure inputs to only have outline on focus
document.querySelectorAll('input').forEach((input)=>{
var outlineStyle = {
width: '2px',
offset: '2px',
color: 'black',
style: 'dotted',
radius: '10px'
}
input.addOutline(outlineStyle);
input.addEventListener('focus', (evt)=>{
var input = evt.target;
input.showOutline();
});
input.addEventListener('blur', (evt)=>{
var input = evt.target;
input.hideOutline();
});
});
</script>
In closing, let me reiterate, that implementing this approach may require more styling than what I have included in my demos, especially if you have already styled the element you want outlined.

outline-style: auto has had full browser support for ages now.
Shorthand is:
outline: auto blue;
This let's you set a custom color, but not a custom thickness, unfortunately (although I think the browser default thickness is a good default).
You can also set a custom outline-offset when using outline-style: auto.
outline: auto blue;
outline-offset: 0px;

you can use box-shadow instead of outline like this
box-shadow: 0 0 1px #000000;
border-radius: 50px;
outline: none;

Try using padding and a background color for the border, then a border for the outline:
.round_outline {
padding: 8px;
background-color: white;
border-radius: 50%;
border: 1px solid black;
}
Worked in my case.

I just set outline transparent.
input[type=text] {
outline: rgba(0, 0, 0, 0);
border-radius: 10px;
}
input[type=text]:focus {
border-color: #0079ff;
}

I like this way.
.circle:before {
content: "";
width: 14px;
height: 14px;
border: 3px solid #fff;
background-color: #ced4da;
border-radius: 7px;
display: inline-block;
margin-bottom: -2px;
margin-right: 7px;
box-shadow: 0px 0px 0px 1px #ced4da;
}
It will create gray circle with wit border around it and again 1px around border!