Pen Settings

HTML

About HTML Preprocessors

HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

Learn more · Versions

Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

The resource you are linking to is using the 'http' protocol, which may not work when the browser is using https.

CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

Learn more · Versions

CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

Powered by Algolia
About External Resources

You can apply CSS to your Pen from any stylesheet on the web. Just put a URL to it here and we'll apply it, in the order you have them, before the CSS in the Pen itself.

You can also link to another Pen here (use the .css URL Extension) and we'll pull the CSS from that Pen and include it. If it's using a matching preprocessor, use the appropriate URL Extension and we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

Learn more · Versions

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

Powered by Algolia
About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

Learn more

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Powered by Algolia
About Packages

Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

If you're using React / ReactDOM, make sure to turn on Babel for the JSX processing.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML 

              
                .form#form
	.field.email
		.icon
		input.input#email(type="email" placeholder="Email" autocomplete="off")
	.field.password
		.icon
		input.input#password(type="password" placeholder="Password")
	button.button#submit LOGIN
		.side-top-bottom
		.side-left-right
	small Fill in the form
!

CSS 

              
                .form
	margin: auto
	width: 400px
	padding: 20px 30px
	background: #fff
	border: 1px solid #dfdfdf
	transform-style: preserve-3d
	perspective-origin: 50px center
	perspective: 2000px
	transition: transform 1s ease
	&::before, &::after
		content: ''
		position: absolute
		width: 100%
		left: 0
	&::before
		height: 100%
		top: 0
		transform: translateZ(-100px)
		background: #333
		opacity: 0.3
	&::after
		content: 'SUCCESS!'
		transform: translateY(-50%) translateZ(-101px) scaleX(-1)
		top: 50%
		color: #fff
		text-align: center
		font-weight: bold

.field
	position: relative
	background: #cfcfcf
	transform-style: preserve-3d
	& + & 
		margin-top: 10px

.icon
	width: 24px
	height: 24px
	position: absolute
	top: calc(50% - 12px)
	left: 12px
	transform: translateZ(50px)
	transform-style: preserve-3d
	&::before, &::after
		content: ''
		display: block
		width: 100%
		height: 100%
		position: absolute
		top: 0
		left: 0
	&::after
		transform: translateZ(-23px)
		opacity: 0.5

.input
	border: 1px solid #dfdfdf
	background: #fff
	height: 48px
	line-height: 48px
	padding: 0 10px 0 48px
	width: 100%
	transform: translateZ(26px)

.button
	display: block
	width: 100%
	border: 0
	text-align: center
	font-weight: bold
	color: #fff
	background: linear-gradient(45deg, #e53935, #e35d5b)
	margin-top: 20px
	padding: 14px
	position: relative
	transform-style: preserve-3d
	transform: translateZ(26px)
	transition: transform 0.3s ease
	cursor: pointer
	&:hover
		transform: translateZ(13px)

.side-top-bottom
	width: 100%
	&::before, &::after
		content: ''
		width: 100%
		height: 26px
		background: linear-gradient(45deg, darken(#e53935, 5%), darken(#e35d5b, 5%))
		position: absolute
		left: 0
	&::before
		transform-origin: center top
		transform: translateZ(-26px) rotateX(90deg)
		top: 0
	&::after
		transform-origin: center bottom
		transform: translateZ(-26px) rotateX(-90deg)
		bottom: 0
.side-left-right
	height: 100%
	&::before, &::after
		content: ''
		height: 100%
		width: 26px
		position: absolute
		top: 0
	&::before
		background: #e53935
		transform-origin: left center
		transform: rotateY(90deg)
		left: 0
	&::after
		background: #e35d5b
		transform-origin: right center
		transform: rotateY(-90deg)
		right: 0

.email .icon
	&::before, &::after
		background: url(https://image.flaticon.com/icons/svg/131/131040.svg) center/contain no-repeat

.password .icon
	&::before, &::after
		background: url(https://image.flaticon.com/icons/svg/130/130996.svg) center/contain no-repeat

	
.face-up-left
	transform: rotateY(-30deg) rotateX(30deg)
.face-up-right
	transform: rotateY(30deg) rotateX(30deg)
.face-down-left
	transform: rotateY(-30deg) rotateX(-30deg)
.face-down-right
	transform: rotateY(30deg) rotateX(-30deg)
.form-complete
	animation: formComplete 2s ease
.form-error
	animation: formError 2s ease

input, button
	&:active, &:focus
		outline: none
		border: 1px solid lighten(#e35d5b, 5%)

@keyframes formComplete
	50%, 55%
		transform: rotateX(30deg) rotateY(180deg)
	100%
		transform: rotateX(0deg) rotateY(1turn)

@keyframes formError
	0%, 100%
		transform: rotateX(0deg) rotateY(0deg)
	25%
		transform: rotateX(-25deg)
	33%
		transform: rotateX(-25deg) rotateY(45deg)
	66%
		transform: rotateX(-25deg) rotateY(-30deg)

small
	color: #999
	text-align: center
	display: block
	margin-top: 20px
	backface-visibility: hidden

html, body
	width: 100%
	height: 100%
	display: flex
	background: linear-gradient(45deg, #83a4d4, #b6fbff)

*, *::before, *::after
	box-sizing: border-box
!

JS 

              
                var formAnim = {
	$form: $('#form'),
	animClasses: ['face-up-left', 'face-up-right', 'face-down-left', 'face-down-right', 'form-complete', 'form-error'],
	resetClasses: function() {
		var $form = this.$form;
		
		$.each(this.animClasses, function(k, c) {
			$form.removeClass(c);
		});
	},
	faceDirection: function(d) {
		this.resetClasses();
		
		d = parseInt(d) < this.animClasses.length? d : -1;
		
		if(d >= 0) {
			this.$form.addClass(this.animClasses[d]);
		} 
	}
}

var $input = $('#email, #password'),
		$submit = $('#submit'),
		focused = false,
		completed = false;


$input.focus(function() {
	focused = true;
	
	if(completed) {
		formAnim.faceDirection(1);
	} else {
		formAnim.faceDirection(0);
	}
});

$input.blur(function() {
	formAnim.resetClasses();
});

$input.on('input paste keyup', function() {
	completed = true;
	
	$input.each(function() {
		if(this.value == '') {
			completed = false;
		}
	});
	
	if(completed) {
		formAnim.faceDirection(1);
	} else {
		formAnim.faceDirection(0);
	}
});

$submit.click(function() {
	focused = true;
	formAnim.resetClasses();
	
	if(completed) {
		$submit.css('pointer-events', 'none');
		setTimeout(function() {
			formAnim.faceDirection(4);
			$input.val('');
			completed = false;

			setTimeout(function() {
				$submit.css('pointer-events', '');
				formAnim.resetClasses();
			}, 2000);
		}, 1000);
	} else {
		setTimeout(function() {
			formAnim.faceDirection(5);

			setTimeout(function() {
				formAnim.resetClasses();
			}, 2000);
		}, 1000);
	}
});

$(function() {
	setTimeout(function() {
		if(!focused) {
			$input.eq(0).focus();
		}
	}, 2000);
})
!
999px

Console