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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <section class="btn-Group btn-Group-circle">
            <h1 class="btn-Group_Header">'Material design' inspired</h1>
            <button class="btn-Btn btn-Btn_Small" >
                <span class="btn-Btn_B">Hello</span>
            </button>
            <button class="btn-Btn btn-Btn_Small" aria-selected="false" >
                <span class="btn-Btn_Name">Sub</span>
                <span class="btn-Btn_B">Hello</span>
            </button>
            <button class="btn-Btn btn-Btn_Large" >
                <span class="btn-Btn_Name">Bigger text</span>
                <span class="btn-Btn_B">To fill this button</span>
            </button>
        </section>
            
          
!

CSS

            
              /*
App reset by Ben Frain @benfrain / benfrain.com

Latest: https://github.com/benfrain/app-reset

An opinionated set of resets suitable for building web applications.

## Accessibility Notes
These resets target HTML elements that typically receive styling defaults by User Agents that I always need to 'undo'.

Be aware that some of these resets have a negative impact on the default usability and accessibility of a web page. Therefore, ensure you add an equivalent accessible style back that matches your project aesthetic.

## You'll want to run this through Autoprefixer You'll typically need to run this through (https://github.com/postcss/autoprefixer) for production. Only essential prefixes are added here (e.g. proprietary property value/pairs) and you'll need to set prefixing relative to your desired browser support matrix.

*/

/*Hat tip to @thierrykoblentz for this approach: https://css-tricks.com/inheriting-box-sizing-probably-slightly-better-best-practice/ */
html {
    box-sizing: border-box;
    /* Nicer looking fonts for OS X and iOS */
    -webkit-font-smoothing: antialiased;
}

/*Yes, the universal selector. No, it isn't slow: https://benfrain.com/css-performance-revisited-selectors-bloat-expensive-styles/*/
* {
    /* Later browsers can be more easily reset with `all: unset`. It's commented out by default here as it's pretty heavy handed. However, further declarations on these elements follow for older browsers. If you uncomment this property/value REMEMBER accessibility for outlines etc. This undoes a LOT of default UA styling, use with EXTREME caution!! */
    /* all: unset; */
    /*This prevents users being able to select text. Stops long presses in iOS bringing up copy/paste UI for example. Note below we specifically switch user-select on for inputs for the sake of Safari. Bug here: https://bugs.webkit.org/show_bug.cgi?id=82692*/
    user-select: none;
    /*This gets -webkit specific prefix as it is a non W3C property*/
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
    /*Older Androids need this instead*/
    -webkit-tap-highlight-color: transparent;
    /* Most devs find border-box easier to reason about. However by inheriting we can mix box-sizing approaches.*/
    box-sizing: inherit;
}

*:before,
*:after {
    box-sizing: inherit;
}

/* Switching user-select on for inputs and contenteditable specifically for Safari (see bug link above)*/
input[type],
[contenteditable] {
    user-select: text;
}

body,
h1,
h2,
h3,
h4,
h5,
h6,
p {
    /*We will be adding our own margin to these elements as needed.*/
    margin: 0;
    /*You'll want to set font-size as needed.*/
    font-size: 1rem;
    /*No bold for h tags unless you want it*/
    font-weight: 400;
}

/* 
Thanks to L. David Baron for this:
https://twitter.com/davidbaron/status/794138427952222210 */
base,
basefont,
datalist,
head,
meta,
script,
style,
title,
noembed,
param,
template {
    display: none;
}

a {
    text-decoration: none;
    color: inherit;
}

/*No bold for b tags by default*/
b {
    font-weight: 400;
}

/*Prevent these elements having italics by default*/
em,
i {
    font-style: normal;
}

/*IMPORTANT: This removes the focus outline for most browsers. Be aware this is a backwards accessibilty step! Mozilla (i.e. Firefox) also adds a dotted outline around a tags and buttons when they receive tab focus which I haven't found an unhacky way of removing.*/
a:focus,
button:focus {
    outline: 0;
}

/* The button element tends to get a lot of default styles which we largely undo here. We set text-alignment (usually set to center by UA style sheet) and the font-family to inherit from your own styles instead. */
button {
    appearance: none;
    background-color: transparent;
    border: 0;
    padding: 0;
    text-align: inherit;
    font-family: inherit;
}

input,
fieldset {
    appearance: none;
    border: 0;
    padding: 0;
    margin: 0;
    /*inputs and fieldset defaults to having a min-width equal to its content in Chrome and Firefox (https://code.google.com/p/chromium/issues/detail?id=560762), we may not want that*/
    min-width: 0;
    /*Reset the font size and family*/
    font-size: 1rem;
    font-family: inherit;
}

/* For IE, we want to remove the default cross ('X') that appears in input fields when a user starts typing - Make sure you add your own! */
input::-ms-clear {
    display: none;
}

/*This switches the default outline off when an input receives focus (really important for users tabbing through with a keyboard) so ensure you put something decent in for your input focus instead!!*/
input:focus {
    outline: 0;
}

input[type="number"] {
    /*Mozilla shows the spinner UI on number inputs unless we use this:*/
    -moz-appearance: textfield;
}

/*Removes the little spinner controls for number type inputs (WebKit browsers/forks only)*/
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    appearance: none;
}

/*SVG defaults to display: inline which I dislike. Inline-block or inline-flex will render white space on SVG elements in HTML (where you would have defs and symbols) if the container isn't a flex box or the font-size set to 0 to crush the whitespace */
svg {
    display: block;
}

img {
    /*Make images behave responsively. Here they will scale up to 100% of their natural size*/
    max-width: 100%;
    /*Make images display as a block (UA default is usually inline)*/
    display: block;
}

/*Removes the default focusring that Mozilla places on select items. From: http://stackoverflow.com/a/18853002/1147859 
Ensure you set `#000` to the colour you want your text to appear */
select:-moz-focusring {
    color: transparent;
    text-shadow: 0 0 0 #000;
}

/* Switching on box-sizing: border-box by default; toggle this off if you want more granular control */
body {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
	margin: 50vh 0;
	background-color: #494949;
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", Tahoma, Roboto, Oxygen, Ubuntu,
        Cantarell, "Fira Sans", "Open Sans", sans-serif;
}


/* Styles relevant to this technique */

.btn-Group {
    max-width: 500px;
    margin: 20vh auto;
    font-size: 0;
    display: flex;
    flex-direction: column;
    background-color: #454545;
}

.btn-Group_Header {
    font-size: 1.3rem;
    color: #ddd;
    background-color: #444;
    padding: 10px;
}

.btn-Btn {
    display: inline-flex;
    padding: 0 10px;
    min-height: 80px;
    align-items: center;
    justify-content: start;
    position: relative;
    z-index: 1;
    margin: 0;
    overflow: hidden;
    transition: all 0.1s;
    background-color: #505050;
}
.btn-Btn:nth-of-type(1) {
    width: 25%;
}
.btn-Btn:nth-of-type(2) {
    width: 50%;
}
.btn-Btn:nth-of-type(3) {
    width: 100%;
}

.btn-Btn:before {
    content: "";
    position: absolute;
    top: calc(var(--y) - var(--width) / 2);
    left: calc(var(--x) - var(--width) / 2);
    transform-origin: 50% 50%;
    background-color: #d2d2d2;
    
    height: var(--width);
    width: var(--width);
    border-radius: 50%;
    z-index: -1;
    transform: scale(0);
    opacity: 0;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn-Group-circle .btn-Btn[aria-selected="true"]:before {
    transform: none;
    opacity: 1;
    transition: transform 0.2s ease, opacity 0.1s ease;
}


.btn-Btn_Name {
    font-size: 1.1rem;
    color: #d2d2d2;
    margin: 0 5px;
    transition: color 0.1s;
}

[aria-selected="true"] .btn-Btn_Name {
    color: #555;
}

.btn-Btn_B {
    font-size: 1.1rem;
    color: #f90;
    transition: color 0.1s;
}

[aria-selected="true"] .btn-Btn_B {
    color: #5948db;
}
            
          
!

JS

            
              document.body.addEventListener("pointerdown", e => {
    // Ignore anything that isn't the button or a child of it
    if (e.target.tagName !== "BUTTON" && e.target.parentNode.tagName !== "BUTTON") {
        return;
    }
    const theBtn = e.target.closest("button");
	const neededLeft = e.x - theBtn.getBoundingClientRect().left;
    const neededTop = e.y - theBtn.getBoundingClientRect().top;
    const biggestA = Math.max(neededLeft, theBtn.getBoundingClientRect().width - neededLeft);
    const biggestB = Math.max(neededTop, theBtn.getBoundingClientRect().height - neededTop);
    //const neededWidth = biggest * 2 + 25;
    //length of diagonal through rectangle is a2 + b2 = c2.
    const neededWidth = Math.sqrt(biggestA * biggestA + biggestB * biggestB) * 2;
    theBtn.style.setProperty("--x", `${neededLeft}px`);
    theBtn.style.setProperty("--y", `${neededTop}px`);
    theBtn.style.setProperty("--width", `${neededWidth}px`);
    theBtn.setAttribute("aria-selected", theBtn.getAttribute("aria-selected") === "true" ? "false" : "true");
});
            
          
!
999px

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