A Pen by Paul Reny.

index.html

<article class="examples">

	<div class="intro">
		<h1>Ladda</h1>
		<p>
			A UI concept which merges loading indicators into the action that invoked them. Primarily intended for use with forms where 
			it gives users immediate feedback upon submit rather than leaving them wondering while the browser does its thing. For a 
      real-world example, check out any of the forms on <a href="http://slid.es" target="_blank">slid.es</a>. Also available at <a href="https://github.com/hakimel/Ladda" target="_blank">github.com/hakimel/Ladda</a>.
		</p>
	</div>
	
	<section>
		<h3>expand-left</h3>
		<button class="ladda-button green expand-left"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<section>
		<h3>expand-right</h3>
		<button class="ladda-button green expand-right"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>
  
	<section>
		<h3>expand-up</h3>
		<button class="ladda-button green expand-up"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<section>
		<h3>expand-down</h3>
		<button class="ladda-button green expand-down"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>


	<section>
		<h3>contract</h3>
		<button class="ladda-button orange contract"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<section>
		<h3>contract-overlay</h3>
		<button class="ladda-button orange contract-overlay" style="z-index: 10;"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<section>
		<h3>zoom-in</h3>
		<button class="ladda-button orange zoom-in"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<section>
		<h3>zoom-out</h3>
		<button class="ladda-button orange zoom-out"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>


	<section>
		<h3>slide-left</h3>
		<button class="ladda-button blue slide-left"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<section>
		<h3>slide-right</h3>
		<button class="ladda-button blue slide-right"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<section>
		<h3>slide-up</h3>
		<button class="ladda-button blue slide-up"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<section>
		<h3>slide-down</h3>
		<button class="ladda-button blue slide-down"><span class="label">Submit</span> <span class="spinner"></span></button>
	</section>

	<small class="outro">by <a href="http://hakim.se">Hakim El Hattab</a> / <a href="http://twitter.com/hakimel">@hakimel</a></small>

</article>

Ladda.markdown

Ladda

A UI concept which merges loading indicators into the action that invoked them.

A Pen by Paul Reny on CodePen.

License.

script.js

var buttons = document.querySelectorAll( '.ladda-button' );

Array.prototype.slice.call( buttons ).forEach( function( button ) {

	var resetTimeout;

	button.addEventListener( 'click', function() {
		
		if( typeof button.getAttribute( 'data-loading' ) === 'string' ) {
			button.removeAttribute( 'data-loading' );
		}
		else {
			button.setAttribute( 'data-loading', '' );
		}

		clearTimeout( resetTimeout );
		resetTimeout = setTimeout( function() {
			button.removeAttribute( 'data-loading' );			
		}, 2000 );

	}, false );

} );

style.css

body {
	background: #f5f5f5;
	font-family: monospace;
	font-size: 14px;
	color: #333333;
}

.examples {
	max-width: 670px;
	margin: 2em auto;
	padding: 4em;
	background: #fff;
	text-align: center
}
	.examples .intro {
		margin-bottom: 3em;
		line-height: 1.4em;
		font-size: 16px;
		text-align: left;
	}
		.examples .intro h1 {
			margin-top: 0;
			font-size: 18px;
		}

	.examples .outro {
		display: block;
		text-align: right;
		margin-top: 3em;
	}
	.examples section {
		display: inline-block;
		width: 24%;
		min-width: 160px;
		margin-bottom: 2em;
		text-align: center;
		vertical-align: top;
	}
	.examples section h3 {
		color: #bbb;
		font-weight: normal;
	}


/*************************************
 * BUTTON BASE
 */

.ladda-button {
	position: relative;
	background: none;
	border: 0;
	padding: 0.8em 1em;
	font-size: 1.3em;
	cursor: pointer;
  outline: 0;

	-webkit-appearance: none;
	-webkit-font-smoothing: antialiased;
	-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
	.ladda-button[data-loading] {
		cursor: default;
	}

/* Green button */
.ladda-button.green {
	background: #2aca76;
	color: #fff;
	border-radius: 2px;
	border: 1px solid transparent;
}
	.ladda-button.green:hover {
		border-color: rgba( 0, 0, 0, 0.07 );
		background-color: #2fe688;
	}
	.ladda-button.green[data-loading] {
		border-color: rgba( 0, 0, 0, 0.07 );
		background-color: #999;
	}

/* Blue button */
.ladda-button.blue {
	background: #53b5e6;
	color: #fff;
	border-radius: 2px;
	border: 1px solid transparent;
}
	.ladda-button.blue:hover {
		border-color: rgba( 0, 0, 0, 0.07 );
		background-color: #58c2f8;
	}
	.ladda-button.blue[data-loading] {
		border-color: rgba( 0, 0, 0, 0.07 );
		background-color: #999;
	}

/* Orange button */
.ladda-button.orange {
	background: #ea8557;
	color: #fff;
	border-radius: 2px;
	border: 1px solid transparent;
}
	.ladda-button.orange:hover {
		border-color: rgba( 0, 0, 0, 0.07 );
		background-color: #ffa96c;
	}
	.ladda-button.orange[data-loading] {
		border-color: rgba( 0, 0, 0, 0.07 );
		background-color: #999;
	}


/* Spinner animation */
.ladda-button .spinner {
	position: absolute;
	width: 32px;
	height: 32px;
	top: 50%;
	margin-top: -16px;
	opacity: 0;
	background-image: url( data:image/gif;base64,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);
}


/*************************************
 * EASING
 */

.ladda-button,
.ladda-button .spinner,
.ladda-button .label {
	-webkit-transition: 0.3s cubic-bezier(0.175, 0.885, 0.320, 1.275) all;
	   -moz-transition: 0.3s cubic-bezier(0.175, 0.885, 0.320, 1.275) all;
	    -ms-transition: 0.3s cubic-bezier(0.175, 0.885, 0.320, 1.275) all;
	        transition: 0.3s cubic-bezier(0.175, 0.885, 0.320, 1.275) all;
}

.ladda-button.zoom-in,
.ladda-button.zoom-in .spinner,
.ladda-button.zoom-in .label,
.ladda-button.zoom-out,
.ladda-button.zoom-out .spinner,
.ladda-button.zoom-out .label {
	-webkit-transition: 0.3s ease all;
	   -moz-transition: 0.3s ease all;
	    -ms-transition: 0.3s ease all;
	        transition: 0.3s ease all;
}


/*************************************
 * EXPAND LEFT
 */

.ladda-button.expand-right .spinner {
	right: 0.8em;
}

.ladda-button.expand-right[data-loading] {
	padding-right: 56px;
}
	.ladda-button.expand-right[data-loading] .spinner {
		opacity: 1;
	}


/*************************************
 * EXPAND RIGHT
 */

.ladda-button.expand-left .spinner {
	left: 0.8em;
}

.ladda-button.expand-left[data-loading] {
	padding-left: 56px;
}
	.ladda-button.expand-left[data-loading] .spinner {
		opacity: 1;
	}


/*************************************
 * EXPAND UP
 */

.ladda-button.expand-up {
	overflow: hidden;
}
	.ladda-button.expand-up .spinner {
		top: -32px;
		left: 50%;
		margin-left: -16px;
	}

.ladda-button.expand-up[data-loading] {
	padding-top: 3em;
}
	.ladda-button.expand-up[data-loading] .spinner {
		opacity: 1;
		top: 0.8em;
		margin-top: 0;
	}


/*************************************
 * EXPAND DOWN
 */

.ladda-button.expand-down {
	overflow: hidden;
}
	.ladda-button.expand-down .spinner {
		top: 3.3em;
		left: 50%;
		margin-left: -16px;
	}

.ladda-button.expand-down[data-loading] {
	padding-bottom: 3em;
}
	.ladda-button.expand-down[data-loading] .spinner {
		opacity: 1;
	}


/*************************************
 * SLIDE LEFT
 */
.ladda-button.slide-left {
	overflow: hidden;
}
	.ladda-button.slide-left .label {
		position: relative;
	}
	.ladda-button.slide-left .spinner {
		left: 100%;
		margin-left: -16px;
	}

.ladda-button.slide-left[data-loading] .label {
	opacity: 0;
	left: -100%;
}
.ladda-button.slide-left[data-loading] .spinner {
	opacity: 1;
	left: 50%;
}


/*************************************
 * SLIDE RIGHT
 */
.ladda-button.slide-right {
	overflow: hidden;
}
	.ladda-button.slide-right .label {
		position: relative;
	}
	.ladda-button.slide-right .spinner {
		right: 100%;
		margin-left: -16px;
	}

.ladda-button.slide-right[data-loading] .label {
	opacity: 0;
	left: 100%;
}
.ladda-button.slide-right[data-loading] .spinner {
	opacity: 1;
	left: 50%;
}


/*************************************
 * SLIDE UP
 */
.ladda-button.slide-up {
	overflow: hidden;
}
	.ladda-button.slide-up .label {
		position: relative;
	}
	.ladda-button.slide-up .spinner {
		left: 50%;
		margin-left: -16px;
		margin-top: 1em;
	}

.ladda-button.slide-up[data-loading] .label {
	opacity: 0;
	top: -1em;
}
.ladda-button.slide-up[data-loading] .spinner {
	opacity: 1;
	margin-top: -16px;
}


/*************************************
 * SLIDE DOWN
 */
.ladda-button.slide-down {
	overflow: hidden;
}
	.ladda-button.slide-down .label {
		position: relative;
	}
	.ladda-button.slide-down .spinner {
		left: 50%;
		margin-left: -16px;
		margin-top: -2em;
	}

.ladda-button.slide-down[data-loading] .label {
	opacity: 0;
	top: 1em;
}
.ladda-button.slide-down[data-loading] .spinner {
	opacity: 1;
	margin-top: -16px;
}


/*************************************
 * ZOOM-OUT
 */

.ladda-button.zoom-out {
	overflow: hidden;
}
	.ladda-button.zoom-out .spinner {
		left: 50%;
		margin-left: -16px;

		-webkit-transform: scale( 2.5 );
		   -moz-transform: scale( 2.5 );
		    -ms-transform: scale( 2.5 );
		        transform: scale( 2.5 );
	}
	.ladda-button.zoom-out .label {
		position: relative;
		display: inline-block;
	}

.ladda-button.zoom-out[data-loading] .label {
	opacity: 0;

	-webkit-transform: scale( 0.5 );
	   -moz-transform: scale( 0.5 );
	    -ms-transform: scale( 0.5 );
	        transform: scale( 0.5 );
}
.ladda-button.zoom-out[data-loading] .spinner {
	opacity: 1;

	-webkit-transform: none;
	   -moz-transform: none;
	    -ms-transform: none;
	        transform: none;
}


/*************************************
 * ZOOM-IN
 */

.ladda-button.zoom-in {
	overflow: hidden;
}
	.ladda-button.zoom-in .spinner {
		left: 50%;
		margin-left: -16px;

		-webkit-transform: scale( 0.2 );
		   -moz-transform: scale( 0.2 );
		    -ms-transform: scale( 0.2 );
		        transform: scale( 0.2 );
	}
	.ladda-button.zoom-in .label {
		position: relative;
		display: inline-block;
	}

.ladda-button.zoom-in[data-loading] .label {
	opacity: 0;

	-webkit-transform: scale( 2.2 );
	   -moz-transform: scale( 2.2 );
	    -ms-transform: scale( 2.2 );
	        transform: scale( 2.2 );
}
.ladda-button.zoom-in[data-loading] .spinner {
	opacity: 1;

	-webkit-transform: none;
	   -moz-transform: none;
	    -ms-transform: none;
	        transform: none;
}


/*************************************
 * CONTRACt
 */

.ladda-button.contract {
	overflow: hidden;
	width: 100px;
}
	.ladda-button.contract .spinner {
		left: 50%;
		margin-left: -16px;
	}

.ladda-button.contract[data-loading] {
	border-radius: 50%;
	width: 52px;
}
	.ladda-button.contract[data-loading] .label {
		opacity: 0;
	}
	.ladda-button.contract[data-loading] .spinner {
		opacity: 1;
	}



/*************************************
 * OVERLAY
 */

.ladda-button.contract-overlay {
	overflow: hidden;
	width: 100px;

	box-shadow: 0px 0px 0px 3000px rgba(0,0,0,0);
}
	.ladda-button.contract-overlay .spinner {
		left: 50%;
		margin-left: -16px;
	}

.ladda-button.contract-overlay[data-loading] {
	border-radius: 50%;
	width: 52px;

	/*outline: 10000px solid rgba( 0, 0, 0, 0.5 );*/
	box-shadow: 0px 0px 0px 3000px rgba(0,0,0,0.8);
}
	.ladda-button.contract-overlay[data-loading] .label {
		opacity: 0;
	}
	.ladda-button.contract-overlay[data-loading] .spinner {
		opacity: 1;
	}